This is a BIOS emulator, porting from SciTech for u-boot, mainly for

ATI video card BIOS. and can be used for x86 code emulation by some
modifications.

Signed-off-by: Jason Jin <Jason.jin@freescale.com>

6 files changed, 11578 insertions, 0 deletions

diff --git a/drivers/bios_emulator/x86emu/debug.c b/drivers/bios_emulator/x86emu/debug.c
new file mode 100644
index 0000000000..0f58a6963f
--- /dev/null
+++ b/drivers/bios_emulator/x86emu/debug.c
@@ -0,0 +1,461 @@
+/****************************************************************************
+*
+*                       Realmode X86 Emulator Library
+*
+*               Copyright (C) 1991-2004 SciTech Software, Inc.
+*                    Copyright (C) David Mosberger-Tang
+*                      Copyright (C) 1999 Egbert Eich
+*
+*  ========================================================================
+*
+*  Permission to use, copy, modify, distribute, and sell this software and
+*  its documentation for any purpose is hereby granted without fee,
+*  provided that the above copyright notice appear in all copies and that
+*  both that copyright notice and this permission notice appear in
+*  supporting documentation, and that the name of the authors not be used
+*  in advertising or publicity pertaining to distribution of the software
+*  without specific, written prior permission.  The authors makes no
+*  representations about the suitability of this software for any purpose.
+*  It is provided "as is" without express or implied warranty.
+*
+*  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+*  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+*  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+*  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+*  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+*  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+*  PERFORMANCE OF THIS SOFTWARE.
+*
+*  ========================================================================
+*
+* Language:     ANSI C
+* Environment:  Any
+* Developer:    Kendall Bennett
+*
+* Description:  This file contains the code to handle debugging of the
+*               emulator.
+*
+****************************************************************************/
+
+#include "x86emu/x86emui.h"
+#include <stdarg.h>
+
+/*----------------------------- Implementation ----------------------------*/
+
+#ifdef DEBUG
+
+static void print_encoded_bytes(u16 s, u16 o);
+static void print_decoded_instruction(void);
+static int parse_line(char *s, int *ps, int *n);
+
+/* should look something like debug's output. */
+void X86EMU_trace_regs(void)
+{
+	if (DEBUG_TRACE()) {
+		x86emu_dump_regs();
+	}
+	if (DEBUG_DECODE() && !DEBUG_DECODE_NOPRINT()) {
+		printk("%04x:%04x ", M.x86.saved_cs, M.x86.saved_ip);
+		print_encoded_bytes(M.x86.saved_cs, M.x86.saved_ip);
+		print_decoded_instruction();
+	}
+}
+
+void X86EMU_trace_xregs(void)
+{
+	if (DEBUG_TRACE()) {
+		x86emu_dump_xregs();
+	}
+}
+
+void x86emu_just_disassemble(void)
+{
+	/*
+	 * This routine called if the flag DEBUG_DISASSEMBLE is set kind
+	 * of a hack!
+	 */
+	printk("%04x:%04x ", M.x86.saved_cs, M.x86.saved_ip);
+	print_encoded_bytes(M.x86.saved_cs, M.x86.saved_ip);
+	print_decoded_instruction();
+}
+
+static void disassemble_forward(u16 seg, u16 off, int n)
+{
+	X86EMU_sysEnv tregs;
+	int i;
+	u8 op1;
+	/*
+	 * hack, hack, hack.  What we do is use the exact machinery set up
+	 * for execution, except that now there is an additional state
+	 * flag associated with the "execution", and we are using a copy
+	 * of the register struct.  All the major opcodes, once fully
+	 * decoded, have the following two steps: TRACE_REGS(r,m);
+	 * SINGLE_STEP(r,m); which disappear if DEBUG is not defined to
+	 * the preprocessor.  The TRACE_REGS macro expands to:
+	 *
+	 * if (debug&DEBUG_DISASSEMBLE)
+	 *     {just_disassemble(); goto EndOfInstruction;}
+	 *     if (debug&DEBUG_TRACE) trace_regs(r,m);
+	 *
+	 * ......  and at the last line of the routine.
+	 *
+	 * EndOfInstruction: end_instr();
+	 *
+	 * Up to the point where TRACE_REG is expanded, NO modifications
+	 * are done to any register EXCEPT the IP register, for fetch and
+	 * decoding purposes.
+	 *
+	 * This was done for an entirely different reason, but makes a
+	 * nice way to get the system to help debug codes.
+	 */
+	tregs = M;
+	tregs.x86.R_IP = off;
+	tregs.x86.R_CS = seg;
+
+	/* reset the decoding buffers */
+	tregs.x86.enc_str_pos = 0;
+	tregs.x86.enc_pos = 0;
+
+	/* turn on the "disassemble only, no execute" flag */
+	tregs.x86.debug |= DEBUG_DISASSEMBLE_F;
+
+	/* DUMP NEXT n instructions to screen in straight_line fashion */
+	/*
+	 * This looks like the regular instruction fetch stream, except
+	 * that when this occurs, each fetched opcode, upon seeing the
+	 * DEBUG_DISASSEMBLE flag set, exits immediately after decoding
+	 * the instruction.  XXX --- CHECK THAT MEM IS NOT AFFECTED!!!
+	 * Note the use of a copy of the register structure...
+	 */
+	for (i = 0; i < n; i++) {
+		op1 = (*sys_rdb) (((u32) M.x86.R_CS << 4) + (M.x86.R_IP++));
+		(x86emu_optab[op1]) (op1);
+	}
+	/* end major hack mode. */
+}
+
+void x86emu_check_ip_access(void)
+{
+	/* NULL as of now */
+}
+
+void x86emu_check_sp_access(void)
+{
+}
+
+void x86emu_check_mem_access(u32 dummy)
+{
+	/*  check bounds, etc */
+}
+
+void x86emu_check_data_access(uint dummy1, uint dummy2)
+{
+	/*  check bounds, etc */
+}
+
+void x86emu_inc_decoded_inst_len(int x)
+{
+	M.x86.enc_pos += x;
+}
+
+void x86emu_decode_printf(char *x)
+{
+	sprintf(M.x86.decoded_buf + M.x86.enc_str_pos, "%s", x);
+	M.x86.enc_str_pos += strlen(x);
+}
+
+void x86emu_decode_printf2(char *x, int y)
+{
+	char temp[100];
+	sprintf(temp, x, y);
+	sprintf(M.x86.decoded_buf + M.x86.enc_str_pos, "%s", temp);
+	M.x86.enc_str_pos += strlen(temp);
+}
+
+void x86emu_end_instr(void)
+{
+	M.x86.enc_str_pos = 0;
+	M.x86.enc_pos = 0;
+}
+
+static void print_encoded_bytes(u16 s, u16 o)
+{
+	int i;
+	char buf1[64];
+	for (i = 0; i < M.x86.enc_pos; i++) {
+		sprintf(buf1 + 2 * i, "%02x", fetch_data_byte_abs(s, o + i));
+	}
+	printk("%-20s", buf1);
+}
+
+static void print_decoded_instruction(void)
+{
+	printk("%s", M.x86.decoded_buf);
+}
+
+void x86emu_print_int_vect(u16 iv)
+{
+	u16 seg, off;
+
+	if (iv > 256)
+		return;
+	seg = fetch_data_word_abs(0, iv * 4);
+	off = fetch_data_word_abs(0, iv * 4 + 2);
+	printk("%04x:%04x ", seg, off);
+}
+
+void X86EMU_dump_memory(u16 seg, u16 off, u32 amt)
+{
+	u32 start = off & 0xfffffff0;
+	u32 end = (off + 16) & 0xfffffff0;
+	u32 i;
+	u32 current;
+
+	current = start;
+	while (end <= off + amt) {
+		printk("%04x:%04x ", seg, start);
+		for (i = start; i < off; i++)
+			printk("   ");
+		for (; i < end; i++)
+			printk("%02x ", fetch_data_byte_abs(seg, i));
+		printk("\n");
+		start = end;
+		end = start + 16;
+	}
+}
+
+void x86emu_single_step(void)
+{
+	char s[1024];
+	int ps[10];
+	int ntok;
+	int cmd;
+	int done;
+	int segment;
+	int offset;
+	static int breakpoint;
+	static int noDecode = 1;
+
+	char *p;
+
+	if (DEBUG_BREAK()) {
+		if (M.x86.saved_ip != breakpoint) {
+			return;
+		} else {
+			M.x86.debug &= ~DEBUG_DECODE_NOPRINT_F;
+			M.x86.debug |= DEBUG_TRACE_F;
+			M.x86.debug &= ~DEBUG_BREAK_F;
+			print_decoded_instruction();
+			X86EMU_trace_regs();
+		}
+	}
+	done = 0;
+	offset = M.x86.saved_ip;
+	while (!done) {
+		printk("-");
+		cmd = parse_line(s, ps, &ntok);
+		switch (cmd) {
+		case 'u':
+			disassemble_forward(M.x86.saved_cs, (u16) offset, 10);
+			break;
+		case 'd':
+			if (ntok == 2) {
+				segment = M.x86.saved_cs;
+				offset = ps[1];
+				X86EMU_dump_memory(segment, (u16) offset, 16);
+				offset += 16;
+			} else if (ntok == 3) {
+				segment = ps[1];
+				offset = ps[2];
+				X86EMU_dump_memory(segment, (u16) offset, 16);
+				offset += 16;
+			} else {
+				segment = M.x86.saved_cs;
+				X86EMU_dump_memory(segment, (u16) offset, 16);
+				offset += 16;
+			}
+			break;
+		case 'c':
+			M.x86.debug ^= DEBUG_TRACECALL_F;
+			break;
+		case 's':
+			M.x86.debug ^=
+			    DEBUG_SVC_F | DEBUG_SYS_F | DEBUG_SYSINT_F;
+			break;
+		case 'r':
+			X86EMU_trace_regs();
+			break;
+		case 'x':
+			X86EMU_trace_xregs();
+			break;
+		case 'g':
+			if (ntok == 2) {
+				breakpoint = ps[1];
+				if (noDecode) {
+					M.x86.debug |= DEBUG_DECODE_NOPRINT_F;
+				} else {
+					M.x86.debug &= ~DEBUG_DECODE_NOPRINT_F;
+				}
+				M.x86.debug &= ~DEBUG_TRACE_F;
+				M.x86.debug |= DEBUG_BREAK_F;
+				done = 1;
+			}
+			break;
+		case 'q':
+			M.x86.debug |= DEBUG_EXIT;
+			return;
+		case 'P':
+			noDecode = (noDecode) ? 0 : 1;
+			printk("Toggled decoding to %s\n",
+			       (noDecode) ? "FALSE" : "TRUE");
+			break;
+		case 't':
+		case 0:
+			done = 1;
+			break;
+		}
+	}
+}
+
+int X86EMU_trace_on(void)
+{
+	return M.x86.debug |= DEBUG_STEP_F | DEBUG_DECODE_F | DEBUG_TRACE_F;
+}
+
+int X86EMU_trace_off(void)
+{
+	return M.x86.debug &= ~(DEBUG_STEP_F | DEBUG_DECODE_F | DEBUG_TRACE_F);
+}
+
+static int parse_line(char *s, int *ps, int *n)
+{
+	int cmd;
+
+	*n = 0;
+	while (*s == ' ' || *s == '\t')
+		s++;
+	ps[*n] = *s;
+	switch (*s) {
+	case '\n':
+		*n += 1;
+		return 0;
+	default:
+		cmd = *s;
+		*n += 1;
+	}
+
+	while (1) {
+		while (*s != ' ' && *s != '\t' && *s != '\n')
+			s++;
+
+		if (*s == '\n')
+			return cmd;
+
+		while (*s == ' ' || *s == '\t')
+			s++;
+
+		*n += 1;
+	}
+}
+
+#endif				/* DEBUG */
+
+void x86emu_dump_regs(void)
+{
+	printk("\tAX=%04x  ", M.x86.R_AX);
+	printk("BX=%04x  ", M.x86.R_BX);
+	printk("CX=%04x  ", M.x86.R_CX);
+	printk("DX=%04x  ", M.x86.R_DX);
+	printk("SP=%04x  ", M.x86.R_SP);
+	printk("BP=%04x  ", M.x86.R_BP);
+	printk("SI=%04x  ", M.x86.R_SI);
+	printk("DI=%04x\n", M.x86.R_DI);
+	printk("\tDS=%04x  ", M.x86.R_DS);
+	printk("ES=%04x  ", M.x86.R_ES);
+	printk("SS=%04x  ", M.x86.R_SS);
+	printk("CS=%04x  ", M.x86.R_CS);
+	printk("IP=%04x   ", M.x86.R_IP);
+	if (ACCESS_FLAG(F_OF))
+		printk("OV ");	/* CHECKED... */
+	else
+		printk("NV ");
+	if (ACCESS_FLAG(F_DF))
+		printk("DN ");
+	else
+		printk("UP ");
+	if (ACCESS_FLAG(F_IF))
+		printk("EI ");
+	else
+		printk("DI ");
+	if (ACCESS_FLAG(F_SF))
+		printk("NG ");
+	else
+		printk("PL ");
+	if (ACCESS_FLAG(F_ZF))
+		printk("ZR ");
+	else
+		printk("NZ ");
+	if (ACCESS_FLAG(F_AF))
+		printk("AC ");
+	else
+		printk("NA ");
+	if (ACCESS_FLAG(F_PF))
+		printk("PE ");
+	else
+		printk("PO ");
+	if (ACCESS_FLAG(F_CF))
+		printk("CY ");
+	else
+		printk("NC ");
+	printk("\n");
+}
+
+void x86emu_dump_xregs(void)
+{
+	printk("\tEAX=%08x  ", M.x86.R_EAX);
+	printk("EBX=%08x  ", M.x86.R_EBX);
+	printk("ECX=%08x  ", M.x86.R_ECX);
+	printk("EDX=%08x  \n", M.x86.R_EDX);
+	printk("\tESP=%08x  ", M.x86.R_ESP);
+	printk("EBP=%08x  ", M.x86.R_EBP);
+	printk("ESI=%08x  ", M.x86.R_ESI);
+	printk("EDI=%08x\n", M.x86.R_EDI);
+	printk("\tDS=%04x  ", M.x86.R_DS);
+	printk("ES=%04x  ", M.x86.R_ES);
+	printk("SS=%04x  ", M.x86.R_SS);
+	printk("CS=%04x  ", M.x86.R_CS);
+	printk("EIP=%08x\n\t", M.x86.R_EIP);
+	if (ACCESS_FLAG(F_OF))
+		printk("OV ");	/* CHECKED... */
+	else
+		printk("NV ");
+	if (ACCESS_FLAG(F_DF))
+		printk("DN ");
+	else
+		printk("UP ");
+	if (ACCESS_FLAG(F_IF))
+		printk("EI ");
+	else
+		printk("DI ");
+	if (ACCESS_FLAG(F_SF))
+		printk("NG ");
+	else
+		printk("PL ");
+	if (ACCESS_FLAG(F_ZF))
+		printk("ZR ");
+	else
+		printk("NZ ");
+	if (ACCESS_FLAG(F_AF))
+		printk("AC ");
+	else
+		printk("NA ");
+	if (ACCESS_FLAG(F_PF))
+		printk("PE ");
+	else
+		printk("PO ");
+	if (ACCESS_FLAG(F_CF))
+		printk("CY ");
+	else
+		printk("NC ");
+	printk("\n");
+}
diff --git a/drivers/bios_emulator/x86emu/decode.c b/drivers/bios_emulator/x86emu/decode.c
new file mode 100644
index 0000000000..b4dbb20797
--- /dev/null
+++ b/drivers/bios_emulator/x86emu/decode.c
@@ -0,0 +1,1148 @@
+/****************************************************************************
+*
+*                       Realmode X86 Emulator Library
+*
+*               Copyright (C) 1991-2004 SciTech Software, Inc.
+*                    Copyright (C) David Mosberger-Tang
+*                      Copyright (C) 1999 Egbert Eich
+*
+*  ========================================================================
+*
+*  Permission to use, copy, modify, distribute, and sell this software and
+*  its documentation for any purpose is hereby granted without fee,
+*  provided that the above copyright notice appear in all copies and that
+*  both that copyright notice and this permission notice appear in
+*  supporting documentation, and that the name of the authors not be used
+*  in advertising or publicity pertaining to distribution of the software
+*  without specific, written prior permission.  The authors makes no
+*  representations about the suitability of this software for any purpose.
+*  It is provided "as is" without express or implied warranty.
+*
+*  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+*  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+*  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+*  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+*  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+*  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+*  PERFORMANCE OF THIS SOFTWARE.
+*
+*  ========================================================================
+*
+* Language:     ANSI C
+* Environment:  Any
+* Developer:    Kendall Bennett
+*
+* Description:  This file includes subroutines which are related to
+*               instruction decoding and accessess of immediate data via IP.  etc.
+*
+****************************************************************************/
+
+#include "x86emu/x86emui.h"
+
+/*----------------------------- Implementation ----------------------------*/
+
+/****************************************************************************
+REMARKS:
+Handles any pending asychronous interrupts.
+****************************************************************************/
+static void x86emu_intr_handle(void)
+{
+    u8  intno;
+
+    if (M.x86.intr & INTR_SYNCH) {
+        intno = M.x86.intno;
+        if (_X86EMU_intrTab[intno]) {
+            (*_X86EMU_intrTab[intno])(intno);
+        } else {
+            push_word((u16)M.x86.R_FLG);
+            CLEAR_FLAG(F_IF);
+            CLEAR_FLAG(F_TF);
+            push_word(M.x86.R_CS);
+            M.x86.R_CS = mem_access_word(intno * 4 + 2);
+            push_word(M.x86.R_IP);
+            M.x86.R_IP = mem_access_word(intno * 4);
+            M.x86.intr = 0;
+        }
+    }
+}
+
+/****************************************************************************
+PARAMETERS:
+intrnum - Interrupt number to raise
+
+REMARKS:
+Raise the specified interrupt to be handled before the execution of the
+next instruction.
+****************************************************************************/
+void x86emu_intr_raise(
+    u8 intrnum)
+{
+    M.x86.intno = intrnum;
+    M.x86.intr |= INTR_SYNCH;
+}
+
+/****************************************************************************
+REMARKS:
+Main execution loop for the emulator. We return from here when the system
+halts, which is normally caused by a stack fault when we return from the
+original real mode call.
+****************************************************************************/
+void X86EMU_exec(void)
+{
+    u8 op1;
+
+    M.x86.intr = 0;
+    DB(x86emu_end_instr();)
+
+    for (;;) {
+DB(     if (CHECK_IP_FETCH())
+            x86emu_check_ip_access();)
+        /* If debugging, save the IP and CS values. */
+        SAVE_IP_CS(M.x86.R_CS, M.x86.R_IP);
+        INC_DECODED_INST_LEN(1);
+        if (M.x86.intr) {
+            if (M.x86.intr & INTR_HALTED) {
+DB(             if (M.x86.R_SP != 0) {
+                    printk("halted\n");
+                    X86EMU_trace_regs();
+                    }
+                else {
+                    if (M.x86.debug)
+                        printk("Service completed successfully\n");
+                    })
+                return;
+            }
+            if (((M.x86.intr & INTR_SYNCH) && (M.x86.intno == 0 || M.x86.intno == 2)) ||
+                !ACCESS_FLAG(F_IF)) {
+                x86emu_intr_handle();
+            }
+        }
+        op1 = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
+        (*x86emu_optab[op1])(op1);
+        if (M.x86.debug & DEBUG_EXIT) {
+            M.x86.debug &= ~DEBUG_EXIT;
+            return;
+        }
+    }
+}
+
+/****************************************************************************
+REMARKS:
+Halts the system by setting the halted system flag.
+****************************************************************************/
+void X86EMU_halt_sys(void)
+{
+    M.x86.intr |= INTR_HALTED;
+}
+
+/****************************************************************************
+PARAMETERS:
+mod     - Mod value from decoded byte
+regh    - Reg h value from decoded byte
+regl    - Reg l value from decoded byte
+
+REMARKS:
+Raise the specified interrupt to be handled before the execution of the
+next instruction.
+
+NOTE: Do not inline this function, as (*sys_rdb) is already inline!
+****************************************************************************/
+void fetch_decode_modrm(
+    int *mod,
+    int *regh,
+    int *regl)
+{
+    int fetched;
+
+DB( if (CHECK_IP_FETCH())
+        x86emu_check_ip_access();)
+    fetched = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
+    INC_DECODED_INST_LEN(1);
+    *mod  = (fetched >> 6) & 0x03;
+    *regh = (fetched >> 3) & 0x07;
+    *regl = (fetched >> 0) & 0x07;
+}
+
+/****************************************************************************
+RETURNS:
+Immediate byte value read from instruction queue
+
+REMARKS:
+This function returns the immediate byte from the instruction queue, and
+moves the instruction pointer to the next value.
+
+NOTE: Do not inline this function, as (*sys_rdb) is already inline!
+****************************************************************************/
+u8 fetch_byte_imm(void)
+{
+    u8 fetched;
+
+DB( if (CHECK_IP_FETCH())
+        x86emu_check_ip_access();)
+    fetched = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
+    INC_DECODED_INST_LEN(1);
+    return fetched;
+}
+
+/****************************************************************************
+RETURNS:
+Immediate word value read from instruction queue
+
+REMARKS:
+This function returns the immediate byte from the instruction queue, and
+moves the instruction pointer to the next value.
+
+NOTE: Do not inline this function, as (*sys_rdw) is already inline!
+****************************************************************************/
+u16 fetch_word_imm(void)
+{
+    u16 fetched;
+
+DB( if (CHECK_IP_FETCH())
+        x86emu_check_ip_access();)
+    fetched = (*sys_rdw)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP));
+    M.x86.R_IP += 2;
+    INC_DECODED_INST_LEN(2);
+    return fetched;
+}
+
+/****************************************************************************
+RETURNS:
+Immediate lone value read from instruction queue
+
+REMARKS:
+This function returns the immediate byte from the instruction queue, and
+moves the instruction pointer to the next value.
+
+NOTE: Do not inline this function, as (*sys_rdw) is already inline!
+****************************************************************************/
+u32 fetch_long_imm(void)
+{
+    u32 fetched;
+
+DB( if (CHECK_IP_FETCH())
+        x86emu_check_ip_access();)
+    fetched = (*sys_rdl)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP));
+    M.x86.R_IP += 4;
+    INC_DECODED_INST_LEN(4);
+    return fetched;
+}
+
+/****************************************************************************
+RETURNS:
+Value of the default data segment
+
+REMARKS:
+Inline function that returns the default data segment for the current
+instruction.
+
+On the x86 processor, the default segment is not always DS if there is
+no segment override. Address modes such as -3[BP] or 10[BP+SI] all refer to
+addresses relative to SS (ie: on the stack). So, at the minimum, all
+decodings of addressing modes would have to set/clear a bit describing
+whether the access is relative to DS or SS.  That is the function of the
+cpu-state-varible M.x86.mode. There are several potential states:
+
+    repe prefix seen  (handled elsewhere)
+    repne prefix seen  (ditto)
+
+    cs segment override
+    ds segment override
+    es segment override
+    fs segment override
+    gs segment override
+    ss segment override
+
+    ds/ss select (in absense of override)
+
+Each of the above 7 items are handled with a bit in the mode field.
+****************************************************************************/
+_INLINE u32 get_data_segment(void)
+{
+#define GET_SEGMENT(segment)
+    switch (M.x86.mode & SYSMODE_SEGMASK) {
+      case 0:                   /* default case: use ds register */
+      case SYSMODE_SEGOVR_DS:
+      case SYSMODE_SEGOVR_DS | SYSMODE_SEG_DS_SS:
+        return  M.x86.R_DS;
+      case SYSMODE_SEG_DS_SS:   /* non-overridden, use ss register */
+        return  M.x86.R_SS;
+      case SYSMODE_SEGOVR_CS:
+      case SYSMODE_SEGOVR_CS | SYSMODE_SEG_DS_SS:
+        return  M.x86.R_CS;
+      case SYSMODE_SEGOVR_ES:
+      case SYSMODE_SEGOVR_ES | SYSMODE_SEG_DS_SS:
+        return  M.x86.R_ES;
+      case SYSMODE_SEGOVR_FS:
+      case SYSMODE_SEGOVR_FS | SYSMODE_SEG_DS_SS:
+        return  M.x86.R_FS;
+      case SYSMODE_SEGOVR_GS:
+      case SYSMODE_SEGOVR_GS | SYSMODE_SEG_DS_SS:
+        return  M.x86.R_GS;
+      case SYSMODE_SEGOVR_SS:
+      case SYSMODE_SEGOVR_SS | SYSMODE_SEG_DS_SS:
+        return  M.x86.R_SS;
+      default:
+#ifdef  DEBUG
+        printk("error: should not happen:  multiple overrides.\n");
+#endif
+        HALT_SYS();
+        return 0;
+    }
+}
+
+/****************************************************************************
+PARAMETERS:
+offset  - Offset to load data from
+
+RETURNS:
+Byte value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u8 fetch_data_byte(
+    uint offset)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+    return (*sys_rdb)((get_data_segment() << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+offset  - Offset to load data from
+
+RETURNS:
+Word value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u16 fetch_data_word(
+    uint offset)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+    return (*sys_rdw)((get_data_segment() << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+offset  - Offset to load data from
+
+RETURNS:
+Long value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u32 fetch_data_long(
+    uint offset)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+    return (*sys_rdl)((get_data_segment() << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to load data from
+offset  - Offset to load data from
+
+RETURNS:
+Byte value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u8 fetch_data_byte_abs(
+    uint segment,
+    uint offset)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access(segment, offset);
+#endif
+    return (*sys_rdb)(((u32)segment << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to load data from
+offset  - Offset to load data from
+
+RETURNS:
+Word value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u16 fetch_data_word_abs(
+    uint segment,
+    uint offset)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access(segment, offset);
+#endif
+    return (*sys_rdw)(((u32)segment << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to load data from
+offset  - Offset to load data from
+
+RETURNS:
+Long value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u32 fetch_data_long_abs(
+    uint segment,
+    uint offset)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access(segment, offset);
+#endif
+    return (*sys_rdl)(((u32)segment << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+offset  - Offset to store data at
+val     - Value to store
+
+REMARKS:
+Writes a word value to an segmented memory location. The segment used is
+the current 'default' segment, which may have been overridden.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_byte(
+    uint offset,
+    u8 val)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+    (*sys_wrb)((get_data_segment() << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+offset  - Offset to store data at
+val     - Value to store
+
+REMARKS:
+Writes a word value to an segmented memory location. The segment used is
+the current 'default' segment, which may have been overridden.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_word(
+    uint offset,
+    u16 val)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+    (*sys_wrw)((get_data_segment() << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+offset  - Offset to store data at
+val     - Value to store
+
+REMARKS:
+Writes a long value to an segmented memory location. The segment used is
+the current 'default' segment, which may have been overridden.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_long(
+    uint offset,
+    u32 val)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+    (*sys_wrl)((get_data_segment() << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to store data at
+offset  - Offset to store data at
+val     - Value to store
+
+REMARKS:
+Writes a byte value to an absolute memory location.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_byte_abs(
+    uint segment,
+    uint offset,
+    u8 val)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access(segment, offset);
+#endif
+    (*sys_wrb)(((u32)segment << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to store data at
+offset  - Offset to store data at
+val     - Value to store
+
+REMARKS:
+Writes a word value to an absolute memory location.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_word_abs(
+    uint segment,
+    uint offset,
+    u16 val)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access(segment, offset);
+#endif
+    (*sys_wrw)(((u32)segment << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to store data at
+offset  - Offset to store data at
+val     - Value to store
+
+REMARKS:
+Writes a long value to an absolute memory location.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_long_abs(
+    uint segment,
+    uint offset,
+    u32 val)
+{
+#ifdef DEBUG
+    if (CHECK_DATA_ACCESS())
+        x86emu_check_data_access(segment, offset);
+#endif
+    (*sys_wrl)(((u32)segment << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+reg - Register to decode
+
+RETURNS:
+Pointer to the appropriate register
+
+REMARKS:
+Return a pointer to the register given by the R/RM field of the
+modrm byte, for byte operands. Also enables the decoding of instructions.
+****************************************************************************/
+u8* decode_rm_byte_register(
+    int reg)
+{
+    switch (reg) {
+      case 0:
+        DECODE_PRINTF("AL");
+        return &M.x86.R_AL;
+      case 1:
+        DECODE_PRINTF("CL");
+        return &M.x86.R_CL;
+      case 2:
+        DECODE_PRINTF("DL");
+        return &M.x86.R_DL;
+      case 3:
+        DECODE_PRINTF("BL");
+        return &M.x86.R_BL;
+      case 4:
+        DECODE_PRINTF("AH");
+        return &M.x86.R_AH;
+      case 5:
+        DECODE_PRINTF("CH");
+        return &M.x86.R_CH;
+      case 6:
+        DECODE_PRINTF("DH");
+        return &M.x86.R_DH;
+      case 7:
+        DECODE_PRINTF("BH");
+        return &M.x86.R_BH;
+    }
+    HALT_SYS();
+    return NULL;                /* NOT REACHED OR REACHED ON ERROR */
+}
+
+/****************************************************************************
+PARAMETERS:
+reg - Register to decode
+
+RETURNS:
+Pointer to the appropriate register
+
+REMARKS:
+Return a pointer to the register given by the R/RM field of the
+modrm byte, for word operands.  Also enables the decoding of instructions.
+****************************************************************************/
+u16* decode_rm_word_register(
+    int reg)
+{
+    switch (reg) {
+      case 0:
+        DECODE_PRINTF("AX");
+        return &M.x86.R_AX;
+      case 1:
+        DECODE_PRINTF("CX");
+        return &M.x86.R_CX;
+      case 2:
+        DECODE_PRINTF("DX");
+        return &M.x86.R_DX;
+      case 3:
+        DECODE_PRINTF("BX");
+        return &M.x86.R_BX;
+      case 4:
+        DECODE_PRINTF("SP");
+        return &M.x86.R_SP;
+      case 5:
+        DECODE_PRINTF("BP");
+        return &M.x86.R_BP;
+      case 6:
+        DECODE_PRINTF("SI");
+        return &M.x86.R_SI;
+      case 7:
+        DECODE_PRINTF("DI");
+        return &M.x86.R_DI;
+    }
+    HALT_SYS();
+    return NULL;                /* NOTREACHED OR REACHED ON ERROR */
+}
+
+/****************************************************************************
+PARAMETERS:
+reg - Register to decode
+
+RETURNS:
+Pointer to the appropriate register
+
+REMARKS:
+Return a pointer to the register given by the R/RM field of the
+modrm byte, for dword operands.  Also enables the decoding of instructions.
+****************************************************************************/
+u32* decode_rm_long_register(
+    int reg)
+{
+    switch (reg) {
+      case 0:
+        DECODE_PRINTF("EAX");
+        return &M.x86.R_EAX;
+      case 1:
+        DECODE_PRINTF("ECX");
+        return &M.x86.R_ECX;
+      case 2:
+        DECODE_PRINTF("EDX");
+        return &M.x86.R_EDX;
+      case 3:
+        DECODE_PRINTF("EBX");
+        return &M.x86.R_EBX;
+      case 4:
+        DECODE_PRINTF("ESP");
+        return &M.x86.R_ESP;
+      case 5:
+        DECODE_PRINTF("EBP");
+        return &M.x86.R_EBP;
+      case 6:
+        DECODE_PRINTF("ESI");
+        return &M.x86.R_ESI;
+      case 7:
+        DECODE_PRINTF("EDI");
+        return &M.x86.R_EDI;
+    }
+    HALT_SYS();
+    return NULL;                /* NOTREACHED OR REACHED ON ERROR */
+}
+
+/****************************************************************************
+PARAMETERS:
+reg - Register to decode
+
+RETURNS:
+Pointer to the appropriate register
+
+REMARKS:
+Return a pointer to the register given by the R/RM field of the
+modrm byte, for word operands, modified from above for the weirdo
+special case of segreg operands.  Also enables the decoding of instructions.
+****************************************************************************/
+u16* decode_rm_seg_register(
+    int reg)
+{
+    switch (reg) {
+      case 0:
+        DECODE_PRINTF("ES");
+        return &M.x86.R_ES;
+      case 1:
+        DECODE_PRINTF("CS");
+        return &M.x86.R_CS;
+      case 2:
+        DECODE_PRINTF("SS");
+        return &M.x86.R_SS;
+      case 3:
+        DECODE_PRINTF("DS");
+        return &M.x86.R_DS;
+      case 4:
+        DECODE_PRINTF("FS");
+        return &M.x86.R_FS;
+      case 5:
+        DECODE_PRINTF("GS");
+        return &M.x86.R_GS;
+      case 6:
+      case 7:
+        DECODE_PRINTF("ILLEGAL SEGREG");
+        break;
+    }
+    HALT_SYS();
+    return NULL;                /* NOT REACHED OR REACHED ON ERROR */
+}
+
+/****************************************************************************
+PARAMETERS:
+scale - scale value of SIB byte
+index - index value of SIB byte
+
+RETURNS:
+Value of scale * index
+
+REMARKS:
+Decodes scale/index of SIB byte and returns relevant offset part of
+effective address.
+****************************************************************************/
+unsigned decode_sib_si(
+    int scale,
+    int index)
+{
+    scale = 1 << scale;
+    if (scale > 1) {
+        DECODE_PRINTF2("[%d*", scale);
+    } else {
+        DECODE_PRINTF("[");
+    }
+    switch (index) {
+      case 0:
+        DECODE_PRINTF("EAX]");
+        return M.x86.R_EAX * index;
+      case 1:
+        DECODE_PRINTF("ECX]");
+        return M.x86.R_ECX * index;
+      case 2:
+        DECODE_PRINTF("EDX]");
+        return M.x86.R_EDX * index;
+      case 3:
+        DECODE_PRINTF("EBX]");
+        return M.x86.R_EBX * index;
+      case 4:
+        DECODE_PRINTF("0]");
+        return 0;
+      case 5:
+        DECODE_PRINTF("EBP]");
+        return M.x86.R_EBP * index;
+      case 6:
+        DECODE_PRINTF("ESI]");
+        return M.x86.R_ESI * index;
+      case 7:
+        DECODE_PRINTF("EDI]");
+        return M.x86.R_EDI * index;
+    }
+    HALT_SYS();
+    return 0;                   /* NOT REACHED OR REACHED ON ERROR */
+}
+
+/****************************************************************************
+PARAMETERS:
+mod - MOD value of preceding ModR/M byte
+
+RETURNS:
+Offset in memory for the address decoding
+
+REMARKS:
+Decodes SIB addressing byte and returns calculated effective address.
+****************************************************************************/
+unsigned decode_sib_address(
+    int mod)
+{
+    int sib   = fetch_byte_imm();
+    int ss    = (sib >> 6) & 0x03;
+    int index = (sib >> 3) & 0x07;
+    int base  = sib & 0x07;
+    int offset = 0;
+    int displacement;
+
+    switch (base) {
+      case 0:
+        DECODE_PRINTF("[EAX]");
+        offset = M.x86.R_EAX;
+        break;
+      case 1:
+        DECODE_PRINTF("[ECX]");
+        offset = M.x86.R_ECX;
+        break;
+      case 2:
+        DECODE_PRINTF("[EDX]");
+        offset = M.x86.R_EDX;
+        break;
+      case 3:
+        DECODE_PRINTF("[EBX]");
+        offset = M.x86.R_EBX;
+        break;
+      case 4:
+        DECODE_PRINTF("[ESP]");
+        offset = M.x86.R_ESP;
+        break;
+      case 5:
+        switch (mod) {
+          case 0:
+            displacement = (s32)fetch_long_imm();
+            DECODE_PRINTF2("[%d]", displacement);
+            offset = displacement;
+            break;
+          case 1:
+            displacement = (s8)fetch_byte_imm();
+            DECODE_PRINTF2("[%d][EBP]", displacement);
+            offset = M.x86.R_EBP + displacement;
+            break;
+          case 2:
+            displacement = (s32)fetch_long_imm();
+            DECODE_PRINTF2("[%d][EBP]", displacement);
+            offset = M.x86.R_EBP + displacement;
+            break;
+          default:
+            HALT_SYS();
+        }
+        DECODE_PRINTF("[EAX]");
+        offset = M.x86.R_EAX;
+        break;
+      case 6:
+        DECODE_PRINTF("[ESI]");
+        offset = M.x86.R_ESI;
+        break;
+      case 7:
+        DECODE_PRINTF("[EDI]");
+        offset = M.x86.R_EDI;
+        break;
+      default:
+        HALT_SYS();
+    }
+    offset += decode_sib_si(ss, index);
+    return offset;
+
+}
+
+/****************************************************************************
+PARAMETERS:
+rm  - RM value to decode
+
+RETURNS:
+Offset in memory for the address decoding
+
+REMARKS:
+Return the offset given by mod=00 addressing.  Also enables the
+decoding of instructions.
+
+NOTE:   The code which specifies the corresponding segment (ds vs ss)
+        below in the case of [BP+..].  The assumption here is that at the
+        point that this subroutine is called, the bit corresponding to
+        SYSMODE_SEG_DS_SS will be zero.  After every instruction
+        except the segment override instructions, this bit (as well
+        as any bits indicating segment overrides) will be clear.  So
+        if a SS access is needed, set this bit.  Otherwise, DS access
+        occurs (unless any of the segment override bits are set).
+****************************************************************************/
+unsigned decode_rm00_address(
+    int rm)
+{
+    unsigned offset;
+
+    if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+        /* 32-bit addressing */
+        switch (rm) {
+          case 0:
+            DECODE_PRINTF("[EAX]");
+            return M.x86.R_EAX;
+          case 1:
+            DECODE_PRINTF("[ECX]");
+            return M.x86.R_ECX;
+          case 2:
+            DECODE_PRINTF("[EDX]");
+            return M.x86.R_EDX;
+          case 3:
+            DECODE_PRINTF("[EBX]");
+            return M.x86.R_EBX;
+          case 4:
+            return decode_sib_address(0);
+          case 5:
+            offset = fetch_long_imm();
+            DECODE_PRINTF2("[%08x]", offset);
+            return offset;
+          case 6:
+            DECODE_PRINTF("[ESI]");
+            return M.x86.R_ESI;
+          case 7:
+            DECODE_PRINTF("[EDI]");
+            return M.x86.R_EDI;
+        }
+    } else {
+        /* 16-bit addressing */
+        switch (rm) {
+          case 0:
+            DECODE_PRINTF("[BX+SI]");
+            return (M.x86.R_BX + M.x86.R_SI) & 0xffff;
+          case 1:
+            DECODE_PRINTF("[BX+DI]");
+            return (M.x86.R_BX + M.x86.R_DI) & 0xffff;
+          case 2:
+            DECODE_PRINTF("[BP+SI]");
+            M.x86.mode |= SYSMODE_SEG_DS_SS;
+            return (M.x86.R_BP + M.x86.R_SI) & 0xffff;
+          case 3:
+            DECODE_PRINTF("[BP+DI]");
+            M.x86.mode |= SYSMODE_SEG_DS_SS;
+            return (M.x86.R_BP + M.x86.R_DI) & 0xffff;
+          case 4:
+            DECODE_PRINTF("[SI]");
+            return M.x86.R_SI;
+          case 5:
+            DECODE_PRINTF("[DI]");
+            return M.x86.R_DI;
+          case 6:
+            offset = fetch_word_imm();
+            DECODE_PRINTF2("[%04x]", offset);
+            return offset;
+          case 7:
+            DECODE_PRINTF("[BX]");
+            return M.x86.R_BX;
+        }
+    }
+    HALT_SYS();
+    return 0;
+}
+
+/****************************************************************************
+PARAMETERS:
+rm  - RM value to decode
+
+RETURNS:
+Offset in memory for the address decoding
+
+REMARKS:
+Return the offset given by mod=01 addressing.  Also enables the
+decoding of instructions.
+****************************************************************************/
+unsigned decode_rm01_address(
+    int rm)
+{
+    int displacement;
+
+    if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+        /* 32-bit addressing */
+        if (rm != 4)
+            displacement = (s8)fetch_byte_imm();
+        else
+            displacement = 0;
+
+        switch (rm) {
+          case 0:
+            DECODE_PRINTF2("%d[EAX]", displacement);
+            return M.x86.R_EAX + displacement;
+          case 1:
+            DECODE_PRINTF2("%d[ECX]", displacement);
+            return M.x86.R_ECX + displacement;
+          case 2:
+            DECODE_PRINTF2("%d[EDX]", displacement);
+            return M.x86.R_EDX + displacement;
+          case 3:
+            DECODE_PRINTF2("%d[EBX]", displacement);
+            return M.x86.R_EBX + displacement;
+          case 4: {
+            int offset = decode_sib_address(1);
+            displacement = (s8)fetch_byte_imm();
+            DECODE_PRINTF2("[%d]", displacement);
+            return offset + displacement;
+          }
+          case 5:
+            DECODE_PRINTF2("%d[EBP]", displacement);
+            return M.x86.R_EBP + displacement;
+          case 6:
+            DECODE_PRINTF2("%d[ESI]", displacement);
+            return M.x86.R_ESI + displacement;
+          case 7:
+            DECODE_PRINTF2("%d[EDI]", displacement);
+            return M.x86.R_EDI + displacement;
+        }
+    } else {
+        /* 16-bit addressing */
+        displacement = (s8)fetch_byte_imm();
+        switch (rm) {
+          case 0:
+            DECODE_PRINTF2("%d[BX+SI]", displacement);
+            return (M.x86.R_BX + M.x86.R_SI + displacement) & 0xffff;
+          case 1:
+            DECODE_PRINTF2("%d[BX+DI]", displacement);
+            return (M.x86.R_BX + M.x86.R_DI + displacement) & 0xffff;
+          case 2:
+            DECODE_PRINTF2("%d[BP+SI]", displacement);
+            M.x86.mode |= SYSMODE_SEG_DS_SS;
+            return (M.x86.R_BP + M.x86.R_SI + displacement) & 0xffff;
+          case 3:
+            DECODE_PRINTF2("%d[BP+DI]", displacement);
+            M.x86.mode |= SYSMODE_SEG_DS_SS;
+            return (M.x86.R_BP + M.x86.R_DI + displacement) & 0xffff;
+          case 4:
+            DECODE_PRINTF2("%d[SI]", displacement);
+            return (M.x86.R_SI + displacement) & 0xffff;
+          case 5:
+            DECODE_PRINTF2("%d[DI]", displacement);
+            return (M.x86.R_DI + displacement) & 0xffff;
+          case 6:
+            DECODE_PRINTF2("%d[BP]", displacement);
+            M.x86.mode |= SYSMODE_SEG_DS_SS;
+            return (M.x86.R_BP + displacement) & 0xffff;
+          case 7:
+            DECODE_PRINTF2("%d[BX]", displacement);
+            return (M.x86.R_BX + displacement) & 0xffff;
+        }
+    }
+    HALT_SYS();
+    return 0;                   /* SHOULD NOT HAPPEN */
+}
+
+/****************************************************************************
+PARAMETERS:
+rm  - RM value to decode
+
+RETURNS:
+Offset in memory for the address decoding
+
+REMARKS:
+Return the offset given by mod=10 addressing.  Also enables the
+decoding of instructions.
+****************************************************************************/
+unsigned decode_rm10_address(
+    int rm)
+{
+    if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+        int displacement;
+
+        /* 32-bit addressing */
+        if (rm != 4)
+            displacement = (s32)fetch_long_imm();
+        else
+            displacement = 0;
+
+        switch (rm) {
+          case 0:
+            DECODE_PRINTF2("%d[EAX]", displacement);
+            return M.x86.R_EAX + displacement;
+          case 1:
+            DECODE_PRINTF2("%d[ECX]", displacement);
+            return M.x86.R_ECX + displacement;
+          case 2:
+            DECODE_PRINTF2("%d[EDX]", displacement);
+            return M.x86.R_EDX + displacement;
+          case 3:
+            DECODE_PRINTF2("%d[EBX]", displacement);
+            return M.x86.R_EBX + displacement;
+          case 4: {
+            int offset = decode_sib_address(2);
+            displacement = (s32)fetch_long_imm();
+            DECODE_PRINTF2("[%d]", displacement);
+            return offset + displacement;
+          }
+          case 5:
+            DECODE_PRINTF2("%d[EBP]", displacement);
+            return M.x86.R_EBP + displacement;
+          case 6:
+            DECODE_PRINTF2("%d[ESI]", displacement);
+            return M.x86.R_ESI + displacement;
+          case 7:
+            DECODE_PRINTF2("%d[EDI]", displacement);
+            return M.x86.R_EDI + displacement;
+        }
+    } else {
+        int displacement = (s16)fetch_word_imm();
+
+        /* 16-bit addressing */
+        switch (rm) {
+          case 0:
+            DECODE_PRINTF2("%d[BX+SI]", displacement);
+            return (M.x86.R_BX + M.x86.R_SI + displacement) & 0xffff;
+          case 1:
+            DECODE_PRINTF2("%d[BX+DI]", displacement);
+            return (M.x86.R_BX + M.x86.R_DI + displacement) & 0xffff;
+          case 2:
+            DECODE_PRINTF2("%d[BP+SI]", displacement);
+            M.x86.mode |= SYSMODE_SEG_DS_SS;
+            return (M.x86.R_BP + M.x86.R_SI + displacement) & 0xffff;
+          case 3:
+            DECODE_PRINTF2("%d[BP+DI]", displacement);
+            M.x86.mode |= SYSMODE_SEG_DS_SS;
+            return (M.x86.R_BP + M.x86.R_DI + displacement) & 0xffff;
+          case 4:
+            DECODE_PRINTF2("%d[SI]", displacement);
+            return (M.x86.R_SI + displacement) & 0xffff;
+          case 5:
+            DECODE_PRINTF2("%d[DI]", displacement);
+            return (M.x86.R_DI + displacement) & 0xffff;
+          case 6:
+            DECODE_PRINTF2("%d[BP]", displacement);
+            M.x86.mode |= SYSMODE_SEG_DS_SS;
+            return (M.x86.R_BP + displacement) & 0xffff;
+          case 7:
+            DECODE_PRINTF2("%d[BX]", displacement);
+            return (M.x86.R_BX + displacement) & 0xffff;
+        }
+    }
+    HALT_SYS();
+    return 0;                   /* SHOULD NOT HAPPEN */
+}
+
+
+/****************************************************************************
+PARAMETERS:
+mod - modifier
+rm  - RM value to decode
+
+RETURNS:
+Offset in memory for the address decoding, multiplexing calls to
+the decode_rmXX_address functions
+
+REMARKS:
+Return the offset given by "mod" addressing.
+****************************************************************************/
+
+unsigned decode_rmXX_address(int mod, int rm)
+{
+  if(mod == 0)
+    return decode_rm00_address(rm);
+  if(mod == 1)
+    return decode_rm01_address(rm);
+  return decode_rm10_address(rm);
+}
+
+
+
diff --git a/drivers/bios_emulator/x86emu/ops.c b/drivers/bios_emulator/x86emu/ops.c
new file mode 100644
index 0000000000..632979dd57
--- /dev/null
+++ b/drivers/bios_emulator/x86emu/ops.c
@@ -0,0 +1,5431 @@
+/****************************************************************************
+*			Realmode X86 Emulator Library
+*
+*  Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
+*  Jason Jin <Jason.jin@freescale.com>
+*
+*            	Copyright (C) 1991-2004 SciTech Software, Inc.
+* 				     Copyright (C) David Mosberger-Tang
+* 					   Copyright (C) 1999 Egbert Eich
+*
+*  ========================================================================
+*
+*  Permission to use, copy, modify, distribute, and sell this software and
+*  its documentation for any purpose is hereby granted without fee,
+*  provided that the above copyright notice appear in all copies and that
+*  both that copyright notice and this permission notice appear in
+*  supporting documentation, and that the name of the authors not be used
+*  in advertising or publicity pertaining to distribution of the software
+*  without specific, written prior permission.  The authors makes no
+*  representations about the suitability of this software for any purpose.
+*  It is provided "as is" without express or implied warranty.
+*
+*  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+*  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+*  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+*  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+*  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+*  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+*  PERFORMANCE OF THIS SOFTWARE.
+*
+*  ========================================================================
+*
+* Language:		ANSI C
+* Environment:	Any
+* Developer:    Kendall Bennett
+*
+* Description:  This file includes subroutines to implement the decoding
+*               and emulation of all the x86 processor instructions.
+*
+* There are approximately 250 subroutines in here, which correspond
+* to the 256 byte-"opcodes" found on the 8086.  The table which
+* dispatches this is found in the files optab.[ch].
+*
+* Each opcode proc has a comment preceeding it which gives it's table
+* address.  Several opcodes are missing (undefined) in the table.
+*
+* Each proc includes information for decoding (DECODE_PRINTF and
+* DECODE_PRINTF2), debugging (TRACE_REGS, SINGLE_STEP), and misc
+* functions (START_OF_INSTR, END_OF_INSTR).
+*
+* Many of the procedures are *VERY* similar in coding.  This has
+* allowed for a very large amount of code to be generated in a fairly
+* short amount of time (i.e. cut, paste, and modify).  The result is
+* that much of the code below could have been folded into subroutines
+* for a large reduction in size of this file.  The downside would be
+* that there would be a penalty in execution speed.  The file could
+* also have been *MUCH* larger by inlining certain functions which
+* were called.  This could have resulted even faster execution.  The
+* prime directive I used to decide whether to inline the code or to
+* modularize it, was basically: 1) no unnecessary subroutine calls,
+* 2) no routines more than about 200 lines in size, and 3) modularize
+* any code that I might not get right the first time.  The fetch_*
+* subroutines fall into the latter category.  The The decode_* fall
+* into the second category.  The coding of the "switch(mod){ .... }"
+* in many of the subroutines below falls into the first category.
+* Especially, the coding of {add,and,or,sub,...}_{byte,word}
+* subroutines are an especially glaring case of the third guideline.
+* Since so much of the code is cloned from other modules (compare
+* opcode #00 to opcode #01), making the basic operations subroutine
+* calls is especially important; otherwise mistakes in coding an
+* "add" would represent a nightmare in maintenance.
+*
+* Jason ported this file to u-boot. place all the function pointer in
+* the got2 sector. Removed some opcode.
+*
+****************************************************************************/
+
+#include "x86emu/x86emui.h"
+/*----------------------------- Implementation ----------------------------*/
+
+/* constant arrays to do several instructions in just one function */
+
+#ifdef DEBUG
+static char *x86emu_GenOpName[8] = {
+    "ADD", "OR", "ADC", "SBB", "AND", "SUB", "XOR", "CMP"};
+#endif
+
+/* used by several opcodes  */
+static u8 (*genop_byte_operation[])(u8 d, u8 s) __attribute__ ((section(".got2"))) =
+{
+    add_byte,           /* 00 */
+    or_byte,            /* 01 */
+    adc_byte,           /* 02 */
+    sbb_byte,           /* 03 */
+    and_byte,           /* 04 */
+    sub_byte,           /* 05 */
+    xor_byte,           /* 06 */
+    cmp_byte,           /* 07 */
+};
+
+static u16 (*genop_word_operation[])(u16 d, u16 s) __attribute__ ((section(".got2"))) =
+{
+    add_word,           /*00 */
+    or_word,            /*01 */
+    adc_word,           /*02 */
+    sbb_word,           /*03 */
+    and_word,           /*04 */
+    sub_word,           /*05 */
+    xor_word,           /*06 */
+    cmp_word,           /*07 */
+};
+
+static u32 (*genop_long_operation[])(u32 d, u32 s) __attribute__ ((section(".got2"))) =
+{
+    add_long,           /*00 */
+    or_long,            /*01 */
+    adc_long,           /*02 */
+    sbb_long,           /*03 */
+    and_long,           /*04 */
+    sub_long,           /*05 */
+    xor_long,           /*06 */
+    cmp_long,           /*07 */
+};
+
+/* used by opcodes 80, c0, d0, and d2. */
+static u8(*opcD0_byte_operation[])(u8 d, u8 s) __attribute__ ((section(".got2"))) =
+{
+    rol_byte,
+    ror_byte,
+    rcl_byte,
+    rcr_byte,
+    shl_byte,
+    shr_byte,
+    shl_byte,           /* sal_byte === shl_byte  by definition */
+    sar_byte,
+};
+
+/* used by opcodes c1, d1, and d3. */
+static u16(*opcD1_word_operation[])(u16 s, u8 d) __attribute__ ((section(".got2"))) =
+{
+    rol_word,
+    ror_word,
+    rcl_word,
+    rcr_word,
+    shl_word,
+    shr_word,
+    shl_word,           /* sal_byte === shl_byte  by definition */
+    sar_word,
+};
+
+/* used by opcodes c1, d1, and d3. */
+static u32 (*opcD1_long_operation[])(u32 s, u8 d) __attribute__ ((section(".got2"))) =
+{
+    rol_long,
+    ror_long,
+    rcl_long,
+    rcr_long,
+    shl_long,
+    shr_long,
+    shl_long,           /* sal_byte === shl_byte  by definition */
+    sar_long,
+};
+
+#ifdef DEBUG
+
+static char *opF6_names[8] =
+  { "TEST\t", "", "NOT\t", "NEG\t", "MUL\t", "IMUL\t", "DIV\t", "IDIV\t" };
+
+#endif
+
+/****************************************************************************
+PARAMETERS:
+op1 - Instruction op code
+
+REMARKS:
+Handles illegal opcodes.
+****************************************************************************/
+void x86emuOp_illegal_op(
+    u8 op1)
+{
+    START_OF_INSTR();
+    if (M.x86.R_SP != 0) {
+        DECODE_PRINTF("ILLEGAL X86 OPCODE\n");
+        TRACE_REGS();
+        DB( printk("%04x:%04x: %02X ILLEGAL X86 OPCODE!\n",
+            M.x86.R_CS, M.x86.R_IP-1,op1));
+        HALT_SYS();
+        }
+    else {
+        /* If we get here, it means the stack pointer is back to zero
+         * so we are just returning from an emulator service call
+         * so therte is no need to display an error message. We trap
+         * the emulator with an 0xF1 opcode to finish the service
+         * call.
+         */
+        X86EMU_halt_sys();
+        }
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x00, 0x08, 0x10, 0x18, 0x20, 0x28, 0x30, 0x38
+****************************************************************************/
+void x86emuOp_genop_byte_RM_R(u8 op1)
+{
+    int mod, rl, rh;
+    uint destoffset;
+    u8 *destreg, *srcreg;
+    u8 destval;
+
+    op1 = (op1 >> 3) & 0x7;
+
+    START_OF_INSTR();
+    DECODE_PRINTF(x86emu_GenOpName[op1]);
+    DECODE_PRINTF("\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if(mod<3)
+        { destoffset = decode_rmXX_address(mod,rl);
+        DECODE_PRINTF(",");
+        destval = fetch_data_byte(destoffset);
+        srcreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        destval = genop_byte_operation[op1](destval, *srcreg);
+        store_data_byte(destoffset, destval);
+        }
+    else
+        {                       /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        DECODE_PRINTF(",");
+        srcreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = genop_byte_operation[op1](*destreg, *srcreg);
+        }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x01, 0x09, 0x11, 0x19, 0x21, 0x29, 0x31, 0x39
+****************************************************************************/
+void x86emuOp_genop_word_RM_R(u8 op1)
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    op1 = (op1 >> 3) & 0x7;
+
+    START_OF_INSTR();
+    DECODE_PRINTF(x86emu_GenOpName[op1]);
+    DECODE_PRINTF("\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+
+    if(mod<3) {
+        destoffset = decode_rmXX_address(mod,rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval;
+            u32 *srcreg;
+
+            DECODE_PRINTF(",");
+            destval = fetch_data_long(destoffset);
+            srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            destval = genop_long_operation[op1](destval, *srcreg);
+            store_data_long(destoffset, destval);
+        } else {
+            u16 destval;
+            u16 *srcreg;
+
+            DECODE_PRINTF(",");
+            destval = fetch_data_word(destoffset);
+            srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            destval = genop_word_operation[op1](destval, *srcreg);
+            store_data_word(destoffset, destval);
+        }
+    } else {                    /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*srcreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = genop_long_operation[op1](*destreg, *srcreg);
+        } else {
+            u16 *destreg,*srcreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = genop_word_operation[op1](*destreg, *srcreg);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x02, 0x0a, 0x12, 0x1a, 0x22, 0x2a, 0x32, 0x3a
+****************************************************************************/
+void x86emuOp_genop_byte_R_RM(u8 op1)
+{
+    int mod, rl, rh;
+    u8 *destreg, *srcreg;
+    uint srcoffset;
+    u8 srcval;
+
+    op1 = (op1 >> 3) & 0x7;
+
+    START_OF_INSTR();
+    DECODE_PRINTF(x86emu_GenOpName[op1]);
+    DECODE_PRINTF("\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcoffset = decode_rmXX_address(mod,rl);
+        srcval = fetch_data_byte(srcoffset);
+    } else {     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcreg = DECODE_RM_BYTE_REGISTER(rl);
+        srcval = *srcreg;
+    }
+    DECODE_PRINTF("\n");
+    TRACE_AND_STEP();
+    *destreg = genop_byte_operation[op1](*destreg, srcval);
+
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x03, 0x0b, 0x13, 0x1b, 0x23, 0x2b, 0x33, 0x3b
+****************************************************************************/
+void x86emuOp_genop_word_R_RM(u8 op1)
+{
+    int mod, rl, rh;
+    uint srcoffset;
+    u32 *destreg32, srcval;
+    u16 *destreg;
+
+    op1 = (op1 >> 3) & 0x7;
+
+    START_OF_INSTR();
+    DECODE_PRINTF(x86emu_GenOpName[op1]);
+    DECODE_PRINTF("\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        srcoffset = decode_rmXX_address(mod,rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            destreg32 = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcval = fetch_data_long(srcoffset);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg32 = genop_long_operation[op1](*destreg32, srcval);
+        } else {
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcval = fetch_data_word(srcoffset);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = genop_word_operation[op1](*destreg, srcval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *srcreg;
+            destreg32 = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg32 = genop_long_operation[op1](*destreg32, *srcreg);
+        } else {
+            u16 *srcreg;
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = genop_word_operation[op1](*destreg, *srcreg);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x04, 0x0c, 0x14, 0x1c, 0x24, 0x2c, 0x34, 0x3c
+****************************************************************************/
+void x86emuOp_genop_byte_AL_IMM(u8 op1)
+{
+    u8 srcval;
+
+    op1 = (op1 >> 3) & 0x7;
+
+    START_OF_INSTR();
+    DECODE_PRINTF(x86emu_GenOpName[op1]);
+    DECODE_PRINTF("\tAL,");
+    srcval = fetch_byte_imm();
+    DECODE_PRINTF2("%x\n", srcval);
+    TRACE_AND_STEP();
+    M.x86.R_AL = genop_byte_operation[op1](M.x86.R_AL, srcval);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x05, 0x0d, 0x15, 0x1d, 0x25, 0x2d, 0x35, 0x3d
+****************************************************************************/
+void x86emuOp_genop_word_AX_IMM(u8 op1)
+{
+    u32 srcval;
+
+    op1 = (op1 >> 3) & 0x7;
+
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF(x86emu_GenOpName[op1]);
+        DECODE_PRINTF("\tEAX,");
+        srcval = fetch_long_imm();
+    } else {
+        DECODE_PRINTF(x86emu_GenOpName[op1]);
+        DECODE_PRINTF("\tAX,");
+        srcval = fetch_word_imm();
+    }
+    DECODE_PRINTF2("%x\n", srcval);
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        M.x86.R_EAX = genop_long_operation[op1](M.x86.R_EAX, srcval);
+    } else {
+        M.x86.R_AX = genop_word_operation[op1](M.x86.R_AX, (u16)srcval);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x06
+****************************************************************************/
+void x86emuOp_push_ES(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("PUSH\tES\n");
+    TRACE_AND_STEP();
+    push_word(M.x86.R_ES);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x07
+****************************************************************************/
+void x86emuOp_pop_ES(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("POP\tES\n");
+    TRACE_AND_STEP();
+    M.x86.R_ES = pop_word();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0e
+****************************************************************************/
+void x86emuOp_push_CS(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("PUSH\tCS\n");
+    TRACE_AND_STEP();
+    push_word(M.x86.R_CS);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f. Escape for two-byte opcode (286 or better)
+****************************************************************************/
+void x86emuOp_two_byte(u8 X86EMU_UNUSED(op1))
+{
+    u8 op2 = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
+    INC_DECODED_INST_LEN(1);
+    (*x86emu_optab2[op2])(op2);
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x16
+****************************************************************************/
+void x86emuOp_push_SS(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("PUSH\tSS\n");
+    TRACE_AND_STEP();
+    push_word(M.x86.R_SS);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x17
+****************************************************************************/
+void x86emuOp_pop_SS(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("POP\tSS\n");
+    TRACE_AND_STEP();
+    M.x86.R_SS = pop_word();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x1e
+****************************************************************************/
+void x86emuOp_push_DS(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("PUSH\tDS\n");
+    TRACE_AND_STEP();
+    push_word(M.x86.R_DS);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x1f
+****************************************************************************/
+void x86emuOp_pop_DS(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("POP\tDS\n");
+    TRACE_AND_STEP();
+    M.x86.R_DS = pop_word();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x26
+****************************************************************************/
+void x86emuOp_segovr_ES(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("ES:\n");
+    TRACE_AND_STEP();
+    M.x86.mode |= SYSMODE_SEGOVR_ES;
+    /*
+     * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
+     * opcode subroutines we do not want to do this.
+     */
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x27
+****************************************************************************/
+void x86emuOp_daa(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("DAA\n");
+    TRACE_AND_STEP();
+    M.x86.R_AL = daa_byte(M.x86.R_AL);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x2e
+****************************************************************************/
+void x86emuOp_segovr_CS(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("CS:\n");
+    TRACE_AND_STEP();
+    M.x86.mode |= SYSMODE_SEGOVR_CS;
+    /* note no DECODE_CLEAR_SEGOVR here. */
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x2f
+****************************************************************************/
+void x86emuOp_das(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("DAS\n");
+    TRACE_AND_STEP();
+    M.x86.R_AL = das_byte(M.x86.R_AL);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x36
+****************************************************************************/
+void x86emuOp_segovr_SS(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("SS:\n");
+    TRACE_AND_STEP();
+    M.x86.mode |= SYSMODE_SEGOVR_SS;
+    /* no DECODE_CLEAR_SEGOVR ! */
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x37
+****************************************************************************/
+void x86emuOp_aaa(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("AAA\n");
+    TRACE_AND_STEP();
+    M.x86.R_AX = aaa_word(M.x86.R_AX);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x3e
+****************************************************************************/
+void x86emuOp_segovr_DS(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("DS:\n");
+    TRACE_AND_STEP();
+    M.x86.mode |= SYSMODE_SEGOVR_DS;
+    /* NO DECODE_CLEAR_SEGOVR! */
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x3f
+****************************************************************************/
+void x86emuOp_aas(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("AAS\n");
+    TRACE_AND_STEP();
+    M.x86.R_AX = aas_word(M.x86.R_AX);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x40 - 0x47
+****************************************************************************/
+void x86emuOp_inc_register(u8 op1)
+{
+    START_OF_INSTR();
+    op1 &= 0x7;
+    DECODE_PRINTF("INC\t");
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        u32 *reg;
+        reg = DECODE_RM_LONG_REGISTER(op1);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *reg = inc_long(*reg);
+    } else {
+        u16 *reg;
+        reg = DECODE_RM_WORD_REGISTER(op1);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *reg = inc_word(*reg);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x48 - 0x4F
+****************************************************************************/
+void x86emuOp_dec_register(u8 op1)
+{
+    START_OF_INSTR();
+    op1 &= 0x7;
+    DECODE_PRINTF("DEC\t");
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        u32 *reg;
+        reg = DECODE_RM_LONG_REGISTER(op1);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *reg = dec_long(*reg);
+    } else {
+        u16 *reg;
+        reg = DECODE_RM_WORD_REGISTER(op1);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *reg = dec_word(*reg);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x50 - 0x57
+****************************************************************************/
+void x86emuOp_push_register(u8 op1)
+{
+    START_OF_INSTR();
+    op1 &= 0x7;
+    DECODE_PRINTF("PUSH\t");
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        u32 *reg;
+        reg = DECODE_RM_LONG_REGISTER(op1);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        push_long(*reg);
+    } else {
+        u16 *reg;
+        reg = DECODE_RM_WORD_REGISTER(op1);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        push_word(*reg);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x58 - 0x5F
+****************************************************************************/
+void x86emuOp_pop_register(u8 op1)
+{
+    START_OF_INSTR();
+    op1 &= 0x7;
+    DECODE_PRINTF("POP\t");
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        u32 *reg;
+        reg = DECODE_RM_LONG_REGISTER(op1);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *reg = pop_long();
+    } else {
+        u16 *reg;
+        reg = DECODE_RM_WORD_REGISTER(op1);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *reg = pop_word();
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x60
+****************************************************************************/
+void x86emuOp_push_all(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("PUSHAD\n");
+    } else {
+        DECODE_PRINTF("PUSHA\n");
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        u32 old_sp = M.x86.R_ESP;
+
+        push_long(M.x86.R_EAX);
+        push_long(M.x86.R_ECX);
+        push_long(M.x86.R_EDX);
+        push_long(M.x86.R_EBX);
+        push_long(old_sp);
+        push_long(M.x86.R_EBP);
+        push_long(M.x86.R_ESI);
+        push_long(M.x86.R_EDI);
+    } else {
+        u16 old_sp = M.x86.R_SP;
+
+        push_word(M.x86.R_AX);
+        push_word(M.x86.R_CX);
+        push_word(M.x86.R_DX);
+        push_word(M.x86.R_BX);
+        push_word(old_sp);
+        push_word(M.x86.R_BP);
+        push_word(M.x86.R_SI);
+        push_word(M.x86.R_DI);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x61
+****************************************************************************/
+void x86emuOp_pop_all(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("POPAD\n");
+    } else {
+        DECODE_PRINTF("POPA\n");
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        M.x86.R_EDI = pop_long();
+        M.x86.R_ESI = pop_long();
+        M.x86.R_EBP = pop_long();
+        M.x86.R_ESP += 4;              /* skip ESP */
+        M.x86.R_EBX = pop_long();
+        M.x86.R_EDX = pop_long();
+        M.x86.R_ECX = pop_long();
+        M.x86.R_EAX = pop_long();
+    } else {
+        M.x86.R_DI = pop_word();
+        M.x86.R_SI = pop_word();
+        M.x86.R_BP = pop_word();
+        M.x86.R_SP += 2;               /* skip SP */
+        M.x86.R_BX = pop_word();
+        M.x86.R_DX = pop_word();
+        M.x86.R_CX = pop_word();
+        M.x86.R_AX = pop_word();
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/*opcode 0x62   ILLEGAL OP, calls x86emuOp_illegal_op() */
+/*opcode 0x63   ILLEGAL OP, calls x86emuOp_illegal_op() */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x64
+****************************************************************************/
+void x86emuOp_segovr_FS(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("FS:\n");
+    TRACE_AND_STEP();
+    M.x86.mode |= SYSMODE_SEGOVR_FS;
+    /*
+     * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
+     * opcode subroutines we do not want to do this.
+     */
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x65
+****************************************************************************/
+void x86emuOp_segovr_GS(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("GS:\n");
+    TRACE_AND_STEP();
+    M.x86.mode |= SYSMODE_SEGOVR_GS;
+    /*
+     * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
+     * opcode subroutines we do not want to do this.
+     */
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x66 - prefix for 32-bit register
+****************************************************************************/
+void x86emuOp_prefix_data(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("DATA:\n");
+    TRACE_AND_STEP();
+    M.x86.mode |= SYSMODE_PREFIX_DATA;
+    /* note no DECODE_CLEAR_SEGOVR here. */
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x67 - prefix for 32-bit address
+****************************************************************************/
+void x86emuOp_prefix_addr(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("ADDR:\n");
+    TRACE_AND_STEP();
+    M.x86.mode |= SYSMODE_PREFIX_ADDR;
+    /* note no DECODE_CLEAR_SEGOVR here. */
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x68
+****************************************************************************/
+void x86emuOp_push_word_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u32 imm;
+
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        imm = fetch_long_imm();
+    } else {
+        imm = fetch_word_imm();
+    }
+    DECODE_PRINTF2("PUSH\t%x\n", imm);
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        push_long(imm);
+    } else {
+        push_word((u16)imm);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x69
+****************************************************************************/
+void x86emuOp_imul_word_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("IMUL\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        srcoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u32 srcval;
+            u32 res_lo,res_hi;
+            s32 imm;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcval = fetch_data_long(srcoffset);
+            imm = fetch_long_imm();
+            DECODE_PRINTF2(",%d\n", (s32)imm);
+            TRACE_AND_STEP();
+            imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm);
+            if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) ||
+                (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            } else {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            }
+            *destreg = (u32)res_lo;
+        } else {
+            u16 *destreg;
+            u16 srcval;
+            u32 res;
+            s16 imm;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcval = fetch_data_word(srcoffset);
+            imm = fetch_word_imm();
+            DECODE_PRINTF2(",%d\n", (s32)imm);
+            TRACE_AND_STEP();
+            res = (s16)srcval * (s16)imm;
+            if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) ||
+                (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            } else {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            }
+            *destreg = (u16)res;
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*srcreg;
+            u32 res_lo,res_hi;
+            s32 imm;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            imm = fetch_long_imm();
+            DECODE_PRINTF2(",%d\n", (s32)imm);
+            TRACE_AND_STEP();
+            imul_long_direct(&res_lo,&res_hi,(s32)*srcreg,(s32)imm);
+            if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) ||
+                (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            } else {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            }
+            *destreg = (u32)res_lo;
+        } else {
+            u16 *destreg,*srcreg;
+            u32 res;
+            s16 imm;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            imm = fetch_word_imm();
+            DECODE_PRINTF2(",%d\n", (s32)imm);
+            res = (s16)*srcreg * (s16)imm;
+            if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) ||
+                (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            } else {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            }
+            *destreg = (u16)res;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6a
+****************************************************************************/
+void x86emuOp_push_byte_IMM(u8 X86EMU_UNUSED(op1))
+{
+    s16 imm;
+
+    START_OF_INSTR();
+    imm = (s8)fetch_byte_imm();
+    DECODE_PRINTF2("PUSH\t%d\n", imm);
+    TRACE_AND_STEP();
+    push_word(imm);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6b
+****************************************************************************/
+void x86emuOp_imul_byte_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+    s8  imm;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("IMUL\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        srcoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u32 srcval;
+            u32 res_lo,res_hi;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcval = fetch_data_long(srcoffset);
+            imm = fetch_byte_imm();
+            DECODE_PRINTF2(",%d\n", (s32)imm);
+            TRACE_AND_STEP();
+            imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm);
+            if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) ||
+                (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            } else {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            }
+            *destreg = (u32)res_lo;
+        } else {
+            u16 *destreg;
+            u16 srcval;
+            u32 res;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcval = fetch_data_word(srcoffset);
+            imm = fetch_byte_imm();
+            DECODE_PRINTF2(",%d\n", (s32)imm);
+            TRACE_AND_STEP();
+            res = (s16)srcval * (s16)imm;
+            if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) ||
+                (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            } else {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            }
+            *destreg = (u16)res;
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*srcreg;
+            u32 res_lo,res_hi;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            imm = fetch_byte_imm();
+            DECODE_PRINTF2(",%d\n", (s32)imm);
+            TRACE_AND_STEP();
+            imul_long_direct(&res_lo,&res_hi,(s32)*srcreg,(s32)imm);
+            if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) ||
+                (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            } else {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            }
+            *destreg = (u32)res_lo;
+        } else {
+            u16 *destreg,*srcreg;
+            u32 res;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            imm = fetch_byte_imm();
+            DECODE_PRINTF2(",%d\n", (s32)imm);
+            TRACE_AND_STEP();
+            res = (s16)*srcreg * (s16)imm;
+            if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) ||
+                (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            } else {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            }
+            *destreg = (u16)res;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6c
+****************************************************************************/
+void x86emuOp_ins_byte(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("INSB\n");
+    ins(1);
+    TRACE_AND_STEP();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6d
+****************************************************************************/
+void x86emuOp_ins_word(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("INSD\n");
+        ins(4);
+    } else {
+        DECODE_PRINTF("INSW\n");
+        ins(2);
+    }
+    TRACE_AND_STEP();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6e
+****************************************************************************/
+void x86emuOp_outs_byte(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("OUTSB\n");
+    outs(1);
+    TRACE_AND_STEP();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6f
+****************************************************************************/
+void x86emuOp_outs_word(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("OUTSD\n");
+        outs(4);
+    } else {
+        DECODE_PRINTF("OUTSW\n");
+        outs(2);
+    }
+    TRACE_AND_STEP();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x70 - 0x7F
+****************************************************************************/
+int x86emu_check_jump_condition(u8 op);
+
+void x86emuOp_jump_near_cond(u8 op1)
+{
+    s8 offset;
+    u16 target;
+    int cond;
+
+    /* jump to byte offset if overflow flag is set */
+    START_OF_INSTR();
+    cond = x86emu_check_jump_condition(op1 & 0xF);
+    offset = (s8)fetch_byte_imm();
+    target = (u16)(M.x86.R_IP + (s16)offset);
+    DECODE_PRINTF2("%x\n", target);
+    TRACE_AND_STEP();
+    if (cond)
+        M.x86.R_IP = target;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x80
+****************************************************************************/
+void x86emuOp_opc80_byte_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg;
+    uint destoffset;
+    u8 imm;
+    u8 destval;
+
+    /*
+     * Weirdo special case instruction format.  Part of the opcode
+     * held below in "RH".  Doubly nested case would result, except
+     * that the decoded instruction
+     */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+
+        switch (rh) {
+        case 0:
+            DECODE_PRINTF("ADD\t");
+            break;
+        case 1:
+            DECODE_PRINTF("OR\t");
+            break;
+        case 2:
+            DECODE_PRINTF("ADC\t");
+            break;
+        case 3:
+            DECODE_PRINTF("SBB\t");
+            break;
+        case 4:
+            DECODE_PRINTF("AND\t");
+            break;
+        case 5:
+            DECODE_PRINTF("SUB\t");
+            break;
+        case 6:
+            DECODE_PRINTF("XOR\t");
+            break;
+        case 7:
+            DECODE_PRINTF("CMP\t");
+            break;
+        }
+    }
+#endif
+    /* know operation, decode the mod byte to find the addressing
+       mode. */
+    if (mod < 3) {
+        DECODE_PRINTF("BYTE PTR ");
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        destval = fetch_data_byte(destoffset);
+        imm = fetch_byte_imm();
+        DECODE_PRINTF2("%x\n", imm);
+        TRACE_AND_STEP();
+        destval = (*genop_byte_operation[rh]) (destval, imm);
+        if (rh != 7)
+            store_data_byte(destoffset, destval);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        DECODE_PRINTF(",");
+        imm = fetch_byte_imm();
+        DECODE_PRINTF2("%x\n", imm);
+        TRACE_AND_STEP();
+        destval = (*genop_byte_operation[rh]) (*destreg, imm);
+        if (rh != 7)
+            *destreg = destval;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x81
+****************************************************************************/
+void x86emuOp_opc81_word_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    /*
+     * Weirdo special case instruction format.  Part of the opcode
+     * held below in "RH".  Doubly nested case would result, except
+     * that the decoded instruction
+     */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+
+        switch (rh) {
+        case 0:
+            DECODE_PRINTF("ADD\t");
+            break;
+        case 1:
+            DECODE_PRINTF("OR\t");
+            break;
+        case 2:
+            DECODE_PRINTF("ADC\t");
+            break;
+        case 3:
+            DECODE_PRINTF("SBB\t");
+            break;
+        case 4:
+            DECODE_PRINTF("AND\t");
+            break;
+        case 5:
+            DECODE_PRINTF("SUB\t");
+            break;
+        case 6:
+            DECODE_PRINTF("XOR\t");
+            break;
+        case 7:
+            DECODE_PRINTF("CMP\t");
+            break;
+        }
+    }
+#endif
+    /*
+     * Know operation, decode the mod byte to find the addressing
+     * mode.
+     */
+    if (mod < 3) {
+        DECODE_PRINTF("DWORD PTR ");
+        destoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval,imm;
+
+            DECODE_PRINTF(",");
+            destval = fetch_data_long(destoffset);
+            imm = fetch_long_imm();
+            DECODE_PRINTF2("%x\n", imm);
+            TRACE_AND_STEP();
+            destval = (*genop_long_operation[rh]) (destval, imm);
+            if (rh != 7)
+                store_data_long(destoffset, destval);
+        } else {
+            u16 destval,imm;
+
+            DECODE_PRINTF(",");
+            destval = fetch_data_word(destoffset);
+            imm = fetch_word_imm();
+            DECODE_PRINTF2("%x\n", imm);
+            TRACE_AND_STEP();
+            destval = (*genop_word_operation[rh]) (destval, imm);
+            if (rh != 7)
+                store_data_word(destoffset, destval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u32 destval,imm;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            imm = fetch_long_imm();
+            DECODE_PRINTF2("%x\n", imm);
+            TRACE_AND_STEP();
+            destval = (*genop_long_operation[rh]) (*destreg, imm);
+            if (rh != 7)
+                *destreg = destval;
+        } else {
+            u16 *destreg;
+            u16 destval,imm;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            imm = fetch_word_imm();
+            DECODE_PRINTF2("%x\n", imm);
+            TRACE_AND_STEP();
+            destval = (*genop_word_operation[rh]) (*destreg, imm);
+            if (rh != 7)
+                *destreg = destval;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x82
+****************************************************************************/
+void x86emuOp_opc82_byte_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg;
+    uint destoffset;
+    u8 imm;
+    u8 destval;
+
+    /*
+     * Weirdo special case instruction format.  Part of the opcode
+     * held below in "RH".  Doubly nested case would result, except
+     * that the decoded instruction Similar to opcode 81, except that
+     * the immediate byte is sign extended to a word length.
+     */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+        switch (rh) {
+        case 0:
+            DECODE_PRINTF("ADD\t");
+            break;
+        case 1:
+            DECODE_PRINTF("OR\t");
+            break;
+        case 2:
+            DECODE_PRINTF("ADC\t");
+            break;
+        case 3:
+            DECODE_PRINTF("SBB\t");
+            break;
+        case 4:
+            DECODE_PRINTF("AND\t");
+            break;
+        case 5:
+            DECODE_PRINTF("SUB\t");
+            break;
+        case 6:
+            DECODE_PRINTF("XOR\t");
+            break;
+        case 7:
+            DECODE_PRINTF("CMP\t");
+            break;
+        }
+    }
+#endif
+    /* know operation, decode the mod byte to find the addressing
+       mode. */
+    if (mod < 3) {
+        DECODE_PRINTF("BYTE PTR ");
+        destoffset = decode_rmXX_address(mod, rl);
+        destval = fetch_data_byte(destoffset);
+        imm = fetch_byte_imm();
+        DECODE_PRINTF2(",%x\n", imm);
+        TRACE_AND_STEP();
+        destval = (*genop_byte_operation[rh]) (destval, imm);
+        if (rh != 7)
+            store_data_byte(destoffset, destval);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        imm = fetch_byte_imm();
+        DECODE_PRINTF2(",%x\n", imm);
+        TRACE_AND_STEP();
+        destval = (*genop_byte_operation[rh]) (*destreg, imm);
+        if (rh != 7)
+            *destreg = destval;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x83
+****************************************************************************/
+void x86emuOp_opc83_word_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    /*
+     * Weirdo special case instruction format.  Part of the opcode
+     * held below in "RH".  Doubly nested case would result, except
+     * that the decoded instruction Similar to opcode 81, except that
+     * the immediate byte is sign extended to a word length.
+     */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+       switch (rh) {
+        case 0:
+            DECODE_PRINTF("ADD\t");
+            break;
+        case 1:
+            DECODE_PRINTF("OR\t");
+            break;
+        case 2:
+            DECODE_PRINTF("ADC\t");
+            break;
+        case 3:
+            DECODE_PRINTF("SBB\t");
+            break;
+        case 4:
+            DECODE_PRINTF("AND\t");
+            break;
+        case 5:
+            DECODE_PRINTF("SUB\t");
+            break;
+        case 6:
+            DECODE_PRINTF("XOR\t");
+            break;
+        case 7:
+            DECODE_PRINTF("CMP\t");
+            break;
+        }
+    }
+#endif
+    /* know operation, decode the mod byte to find the addressing
+       mode. */
+    if (mod < 3) {
+        DECODE_PRINTF("DWORD PTR ");
+        destoffset = decode_rmXX_address(mod,rl);
+
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval,imm;
+
+            destval = fetch_data_long(destoffset);
+            imm = (s8) fetch_byte_imm();
+            DECODE_PRINTF2(",%x\n", imm);
+            TRACE_AND_STEP();
+            destval = (*genop_long_operation[rh]) (destval, imm);
+            if (rh != 7)
+                store_data_long(destoffset, destval);
+        } else {
+            u16 destval,imm;
+
+            destval = fetch_data_word(destoffset);
+            imm = (s8) fetch_byte_imm();
+            DECODE_PRINTF2(",%x\n", imm);
+            TRACE_AND_STEP();
+            destval = (*genop_word_operation[rh]) (destval, imm);
+            if (rh != 7)
+                store_data_word(destoffset, destval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u32 destval,imm;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            imm = (s8) fetch_byte_imm();
+            DECODE_PRINTF2(",%x\n", imm);
+            TRACE_AND_STEP();
+            destval = (*genop_long_operation[rh]) (*destreg, imm);
+            if (rh != 7)
+                *destreg = destval;
+        } else {
+            u16 *destreg;
+            u16 destval,imm;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            imm = (s8) fetch_byte_imm();
+            DECODE_PRINTF2(",%x\n", imm);
+            TRACE_AND_STEP();
+            destval = (*genop_word_operation[rh]) (*destreg, imm);
+            if (rh != 7)
+                *destreg = destval;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x84
+****************************************************************************/
+void x86emuOp_test_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg, *srcreg;
+    uint destoffset;
+    u8 destval;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("TEST\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        destval = fetch_data_byte(destoffset);
+        srcreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        test_byte(destval, *srcreg);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        DECODE_PRINTF(",");
+        srcreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        test_byte(*destreg, *srcreg);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x85
+****************************************************************************/
+void x86emuOp_test_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("TEST\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval;
+            u32 *srcreg;
+
+            DECODE_PRINTF(",");
+            destval = fetch_data_long(destoffset);
+            srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            test_long(destval, *srcreg);
+        } else {
+            u16 destval;
+            u16 *srcreg;
+
+            DECODE_PRINTF(",");
+            destval = fetch_data_word(destoffset);
+            srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            test_word(destval, *srcreg);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*srcreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            test_long(*destreg, *srcreg);
+        } else {
+            u16 *destreg,*srcreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            test_word(*destreg, *srcreg);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x86
+****************************************************************************/
+void x86emuOp_xchg_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg, *srcreg;
+    uint destoffset;
+    u8 destval;
+    u8 tmp;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("XCHG\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        destval = fetch_data_byte(destoffset);
+        srcreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        tmp = *srcreg;
+        *srcreg = destval;
+        destval = tmp;
+        store_data_byte(destoffset, destval);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        DECODE_PRINTF(",");
+        srcreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        tmp = *srcreg;
+        *srcreg = *destreg;
+        *destreg = tmp;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x87
+****************************************************************************/
+void x86emuOp_xchg_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("XCHG\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *srcreg;
+            u32 destval,tmp;
+
+            destval = fetch_data_long(destoffset);
+            srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            tmp = *srcreg;
+            *srcreg = destval;
+            destval = tmp;
+            store_data_long(destoffset, destval);
+        } else {
+            u16 *srcreg;
+            u16 destval,tmp;
+
+            destval = fetch_data_word(destoffset);
+            srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            tmp = *srcreg;
+            *srcreg = destval;
+            destval = tmp;
+            store_data_word(destoffset, destval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*srcreg;
+            u32 tmp;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            tmp = *srcreg;
+            *srcreg = *destreg;
+            *destreg = tmp;
+        } else {
+            u16 *destreg,*srcreg;
+            u16 tmp;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            tmp = *srcreg;
+            *srcreg = *destreg;
+            *destreg = tmp;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x88
+****************************************************************************/
+void x86emuOp_mov_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg, *srcreg;
+    uint destoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        srcreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        store_data_byte(destoffset, *srcreg);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        DECODE_PRINTF(",");
+        srcreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = *srcreg;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x89
+****************************************************************************/
+void x86emuOp_mov_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *srcreg;
+
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            store_data_long(destoffset, *srcreg);
+        } else {
+            u16 *srcreg;
+
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            store_data_word(destoffset, *srcreg);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*srcreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = *srcreg;
+        } else {
+            u16 *destreg,*srcreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = *srcreg;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8a
+****************************************************************************/
+void x86emuOp_mov_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg, *srcreg;
+    uint srcoffset;
+    u8 srcval;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcoffset = decode_rmXX_address(mod, rl);
+        srcval = fetch_data_byte(srcoffset);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = srcval;
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcreg = DECODE_RM_BYTE_REGISTER(rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = *srcreg;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8b
+****************************************************************************/
+void x86emuOp_mov_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u32 srcval;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcoffset = decode_rmXX_address(mod, rl);
+            srcval = fetch_data_long(srcoffset);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = srcval;
+        } else {
+            u16 *destreg;
+            u16 srcval;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcoffset = decode_rmXX_address(mod, rl);
+            srcval = fetch_data_word(srcoffset);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = srcval;
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg, *srcreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = *srcreg;
+        } else {
+            u16 *destreg, *srcreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = *srcreg;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8c
+****************************************************************************/
+void x86emuOp_mov_word_RM_SR(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u16 *destreg, *srcreg;
+    uint destoffset;
+    u16 destval;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        srcreg = decode_rm_seg_register(rh);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        destval = *srcreg;
+        store_data_word(destoffset, destval);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_WORD_REGISTER(rl);
+        DECODE_PRINTF(",");
+        srcreg = decode_rm_seg_register(rh);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = *srcreg;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8d
+****************************************************************************/
+void x86emuOp_lea_word_R_M(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u16 *srcreg;
+    uint destoffset;
+
+/*
+ * TODO: Need to handle address size prefix!
+ *
+ * lea  eax,[eax+ebx*2] ??
+ */
+
+    START_OF_INSTR();
+    DECODE_PRINTF("LEA\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        srcreg = DECODE_RM_WORD_REGISTER(rh);
+        DECODE_PRINTF(",");
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *srcreg = (u16)destoffset;
+        }
+    /* } else { undefined.  Do nothing. } */
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8e
+****************************************************************************/
+void x86emuOp_mov_word_SR_RM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u16 *destreg, *srcreg;
+    uint srcoffset;
+    u16 srcval;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destreg = decode_rm_seg_register(rh);
+        DECODE_PRINTF(",");
+        srcoffset = decode_rmXX_address(mod, rl);
+        srcval = fetch_data_word(srcoffset);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = srcval;
+    } else {                     /* register to register */
+        destreg = decode_rm_seg_register(rh);
+        DECODE_PRINTF(",");
+        srcreg = DECODE_RM_WORD_REGISTER(rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = *srcreg;
+    }
+    /*
+     * Clean up, and reset all the R_xSP pointers to the correct
+     * locations.  This is about 3x too much overhead (doing all the
+     * segreg ptrs when only one is needed, but this instruction
+     * *cannot* be that common, and this isn't too much work anyway.
+     */
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8f
+****************************************************************************/
+void x86emuOp_pop_RM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("POP\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (rh != 0) {
+        DECODE_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n");
+        HALT_SYS();
+    }
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval;
+
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            destval = pop_long();
+            store_data_long(destoffset, destval);
+        } else {
+            u16 destval;
+
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            destval = pop_word();
+            store_data_word(destoffset, destval);
+        }
+    } else {                    /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = pop_long();
+        } else {
+            u16 *destreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = pop_word();
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x90
+****************************************************************************/
+void x86emuOp_nop(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("NOP\n");
+    TRACE_AND_STEP();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x91-0x97
+****************************************************************************/
+void x86emuOp_xchg_word_AX_register(u8 X86EMU_UNUSED(op1))
+{
+    u32 tmp;
+
+    op1 &= 0x7;
+
+    START_OF_INSTR();
+
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        u32 *reg32;
+        DECODE_PRINTF("XCHG\tEAX,");
+        reg32 = DECODE_RM_LONG_REGISTER(op1);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        tmp = M.x86.R_EAX;
+        M.x86.R_EAX = *reg32;
+        *reg32 = tmp;
+    } else {
+        u16 *reg16;
+        DECODE_PRINTF("XCHG\tAX,");
+        reg16 = DECODE_RM_WORD_REGISTER(op1);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        tmp = M.x86.R_AX;
+        M.x86.R_EAX = *reg16;
+        *reg16 = (u16)tmp;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x98
+****************************************************************************/
+void x86emuOp_cbw(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("CWDE\n");
+    } else {
+        DECODE_PRINTF("CBW\n");
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        if (M.x86.R_AX & 0x8000) {
+            M.x86.R_EAX |= 0xffff0000;
+        } else {
+            M.x86.R_EAX &= 0x0000ffff;
+        }
+    } else {
+        if (M.x86.R_AL & 0x80) {
+            M.x86.R_AH = 0xff;
+        } else {
+            M.x86.R_AH = 0x0;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x99
+****************************************************************************/
+void x86emuOp_cwd(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("CDQ\n");
+    } else {
+        DECODE_PRINTF("CWD\n");
+    }
+    DECODE_PRINTF("CWD\n");
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        if (M.x86.R_EAX & 0x80000000) {
+            M.x86.R_EDX = 0xffffffff;
+        } else {
+            M.x86.R_EDX = 0x0;
+        }
+    } else {
+        if (M.x86.R_AX & 0x8000) {
+            M.x86.R_DX = 0xffff;
+        } else {
+            M.x86.R_DX = 0x0;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9a
+****************************************************************************/
+void x86emuOp_call_far_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u16 farseg, faroff;
+
+    START_OF_INSTR();
+	DECODE_PRINTF("CALL\t");
+	faroff = fetch_word_imm();
+	farseg = fetch_word_imm();
+	DECODE_PRINTF2("%04x:", farseg);
+	DECODE_PRINTF2("%04x\n", faroff);
+	CALL_TRACE(M.x86.saved_cs, M.x86.saved_ip, farseg, faroff, "FAR ");
+
+    /* XXX
+     *
+     * Hooked interrupt vectors calling into our "BIOS" will cause
+     * problems unless all intersegment stuff is checked for BIOS
+     * access.  Check needed here.  For moment, let it alone.
+     */
+    TRACE_AND_STEP();
+    push_word(M.x86.R_CS);
+    M.x86.R_CS = farseg;
+    push_word(M.x86.R_IP);
+    M.x86.R_IP = faroff;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9b
+****************************************************************************/
+void x86emuOp_wait(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("WAIT");
+    TRACE_AND_STEP();
+    /* NADA.  */
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9c
+****************************************************************************/
+void x86emuOp_pushf_word(u8 X86EMU_UNUSED(op1))
+{
+    u32 flags;
+
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("PUSHFD\n");
+    } else {
+        DECODE_PRINTF("PUSHF\n");
+    }
+    TRACE_AND_STEP();
+
+    /* clear out *all* bits not representing flags, and turn on real bits */
+    flags = (M.x86.R_EFLG & F_MSK) | F_ALWAYS_ON;
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        push_long(flags);
+    } else {
+        push_word((u16)flags);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9d
+****************************************************************************/
+void x86emuOp_popf_word(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("POPFD\n");
+    } else {
+        DECODE_PRINTF("POPF\n");
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        M.x86.R_EFLG = pop_long();
+    } else {
+        M.x86.R_FLG = pop_word();
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9e
+****************************************************************************/
+void x86emuOp_sahf(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("SAHF\n");
+    TRACE_AND_STEP();
+    /* clear the lower bits of the flag register */
+    M.x86.R_FLG &= 0xffffff00;
+    /* or in the AH register into the flags register */
+    M.x86.R_FLG |= M.x86.R_AH;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9f
+****************************************************************************/
+void x86emuOp_lahf(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("LAHF\n");
+    TRACE_AND_STEP();
+	M.x86.R_AH = (u8)(M.x86.R_FLG & 0xff);
+    /*undocumented TC++ behavior??? Nope.  It's documented, but
+       you have too look real hard to notice it. */
+    M.x86.R_AH |= 0x2;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa0
+****************************************************************************/
+void x86emuOp_mov_AL_M_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u16 offset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\tAL,");
+    offset = fetch_word_imm();
+    DECODE_PRINTF2("[%04x]\n", offset);
+    TRACE_AND_STEP();
+    M.x86.R_AL = fetch_data_byte(offset);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa1
+****************************************************************************/
+void x86emuOp_mov_AX_M_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u16 offset;
+
+    START_OF_INSTR();
+    offset = fetch_word_imm();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF2("MOV\tEAX,[%04x]\n", offset);
+    } else {
+        DECODE_PRINTF2("MOV\tAX,[%04x]\n", offset);
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        M.x86.R_EAX = fetch_data_long(offset);
+    } else {
+        M.x86.R_AX = fetch_data_word(offset);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa2
+****************************************************************************/
+void x86emuOp_mov_M_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u16 offset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    offset = fetch_word_imm();
+    DECODE_PRINTF2("[%04x],AL\n", offset);
+    TRACE_AND_STEP();
+    store_data_byte(offset, M.x86.R_AL);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa3
+****************************************************************************/
+void x86emuOp_mov_M_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u16 offset;
+
+    START_OF_INSTR();
+    offset = fetch_word_imm();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF2("MOV\t[%04x],EAX\n", offset);
+    } else {
+        DECODE_PRINTF2("MOV\t[%04x],AX\n", offset);
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        store_data_long(offset, M.x86.R_EAX);
+    } else {
+        store_data_word(offset, M.x86.R_AX);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa4
+****************************************************************************/
+void x86emuOp_movs_byte(u8 X86EMU_UNUSED(op1))
+{
+    u8  val;
+    u32 count;
+    int inc;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOVS\tBYTE\n");
+    if (ACCESS_FLAG(F_DF))   /* down */
+        inc = -1;
+    else
+        inc = 1;
+    TRACE_AND_STEP();
+    count = 1;
+    if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+        /* dont care whether REPE or REPNE */
+        /* move them until CX is ZERO. */
+        count = M.x86.R_CX;
+        M.x86.R_CX = 0;
+        M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+    }
+    while (count--) {
+        val = fetch_data_byte(M.x86.R_SI);
+        store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, val);
+        M.x86.R_SI += inc;
+        M.x86.R_DI += inc;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa5
+****************************************************************************/
+void x86emuOp_movs_word(u8 X86EMU_UNUSED(op1))
+{
+    u32 val;
+    int inc;
+    u32 count;
+
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("MOVS\tDWORD\n");
+        if (ACCESS_FLAG(F_DF))      /* down */
+            inc = -4;
+        else
+            inc = 4;
+    } else {
+        DECODE_PRINTF("MOVS\tWORD\n");
+        if (ACCESS_FLAG(F_DF))      /* down */
+            inc = -2;
+        else
+            inc = 2;
+    }
+    TRACE_AND_STEP();
+    count = 1;
+    if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+        /* dont care whether REPE or REPNE */
+        /* move them until CX is ZERO. */
+        count = M.x86.R_CX;
+        M.x86.R_CX = 0;
+        M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+    }
+    while (count--) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            val = fetch_data_long(M.x86.R_SI);
+            store_data_long_abs(M.x86.R_ES, M.x86.R_DI, val);
+        } else {
+            val = fetch_data_word(M.x86.R_SI);
+            store_data_word_abs(M.x86.R_ES, M.x86.R_DI, (u16)val);
+        }
+        M.x86.R_SI += inc;
+        M.x86.R_DI += inc;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa6
+****************************************************************************/
+void x86emuOp_cmps_byte(u8 X86EMU_UNUSED(op1))
+{
+    s8 val1, val2;
+    int inc;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("CMPS\tBYTE\n");
+    TRACE_AND_STEP();
+    if (ACCESS_FLAG(F_DF))   /* down */
+        inc = -1;
+    else
+        inc = 1;
+
+    if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+        /* REPE  */
+        /* move them until CX is ZERO. */
+        while (M.x86.R_CX != 0) {
+            val1 = fetch_data_byte(M.x86.R_SI);
+            val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+                     cmp_byte(val1, val2);
+            M.x86.R_CX -= 1;
+            M.x86.R_SI += inc;
+            M.x86.R_DI += inc;
+            if ( (M.x86.mode & SYSMODE_PREFIX_REPE) && (ACCESS_FLAG(F_ZF) == 0) ) break;
+            if ( (M.x86.mode & SYSMODE_PREFIX_REPNE) && ACCESS_FLAG(F_ZF) ) break;
+        }
+        M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+    } else {
+        val1 = fetch_data_byte(M.x86.R_SI);
+        val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+        cmp_byte(val1, val2);
+        M.x86.R_SI += inc;
+        M.x86.R_DI += inc;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa7
+****************************************************************************/
+void x86emuOp_cmps_word(u8 X86EMU_UNUSED(op1))
+{
+    u32 val1,val2;
+    int inc;
+
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("CMPS\tDWORD\n");
+        inc = 4;
+    } else {
+        DECODE_PRINTF("CMPS\tWORD\n");
+        inc = 2;
+    }
+    if (ACCESS_FLAG(F_DF))   /* down */
+        inc = -inc;
+
+    TRACE_AND_STEP();
+    if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+        /* REPE  */
+        /* move them until CX is ZERO. */
+        while (M.x86.R_CX != 0) {
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                val1 = fetch_data_long(M.x86.R_SI);
+                val2 = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+                cmp_long(val1, val2);
+            } else {
+                val1 = fetch_data_word(M.x86.R_SI);
+                val2 = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+                cmp_word((u16)val1, (u16)val2);
+            }
+            M.x86.R_CX -= 1;
+            M.x86.R_SI += inc;
+            M.x86.R_DI += inc;
+            if ( (M.x86.mode & SYSMODE_PREFIX_REPE) && ACCESS_FLAG(F_ZF) == 0 ) break;
+            if ( (M.x86.mode & SYSMODE_PREFIX_REPNE) && ACCESS_FLAG(F_ZF) ) break;
+        }
+        M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+    } else {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            val1 = fetch_data_long(M.x86.R_SI);
+            val2 = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+            cmp_long(val1, val2);
+        } else {
+            val1 = fetch_data_word(M.x86.R_SI);
+            val2 = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+            cmp_word((u16)val1, (u16)val2);
+        }
+        M.x86.R_SI += inc;
+        M.x86.R_DI += inc;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa8
+****************************************************************************/
+void x86emuOp_test_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int imm;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("TEST\tAL,");
+    imm = fetch_byte_imm();
+    DECODE_PRINTF2("%04x\n", imm);
+    TRACE_AND_STEP();
+	test_byte(M.x86.R_AL, (u8)imm);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa9
+****************************************************************************/
+void x86emuOp_test_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u32 srcval;
+
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("TEST\tEAX,");
+        srcval = fetch_long_imm();
+    } else {
+        DECODE_PRINTF("TEST\tAX,");
+        srcval = fetch_word_imm();
+    }
+    DECODE_PRINTF2("%x\n", srcval);
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        test_long(M.x86.R_EAX, srcval);
+    } else {
+        test_word(M.x86.R_AX, (u16)srcval);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xaa
+****************************************************************************/
+void x86emuOp_stos_byte(u8 X86EMU_UNUSED(op1))
+{
+    int inc;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("STOS\tBYTE\n");
+    if (ACCESS_FLAG(F_DF))   /* down */
+        inc = -1;
+    else
+        inc = 1;
+    TRACE_AND_STEP();
+    if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+        /* dont care whether REPE or REPNE */
+        /* move them until CX is ZERO. */
+        while (M.x86.R_CX != 0) {
+            store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AL);
+            M.x86.R_CX -= 1;
+            M.x86.R_DI += inc;
+        }
+        M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+    } else {
+        store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AL);
+        M.x86.R_DI += inc;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xab
+****************************************************************************/
+void x86emuOp_stos_word(u8 X86EMU_UNUSED(op1))
+{
+    int inc;
+    u32 count;
+
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("STOS\tDWORD\n");
+        if (ACCESS_FLAG(F_DF))   /* down */
+            inc = -4;
+        else
+            inc = 4;
+    } else {
+        DECODE_PRINTF("STOS\tWORD\n");
+        if (ACCESS_FLAG(F_DF))   /* down */
+            inc = -2;
+        else
+            inc = 2;
+    }
+    TRACE_AND_STEP();
+    count = 1;
+    if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+        /* dont care whether REPE or REPNE */
+        /* move them until CX is ZERO. */
+        count = M.x86.R_CX;
+        M.x86.R_CX = 0;
+        M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+    }
+    while (count--) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            store_data_long_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_EAX);
+        } else {
+            store_data_word_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AX);
+        }
+        M.x86.R_DI += inc;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xac
+****************************************************************************/
+void x86emuOp_lods_byte(u8 X86EMU_UNUSED(op1))
+{
+    int inc;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("LODS\tBYTE\n");
+    TRACE_AND_STEP();
+    if (ACCESS_FLAG(F_DF))   /* down */
+        inc = -1;
+    else
+        inc = 1;
+    if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+        /* dont care whether REPE or REPNE */
+        /* move them until CX is ZERO. */
+        while (M.x86.R_CX != 0) {
+            M.x86.R_AL = fetch_data_byte(M.x86.R_SI);
+            M.x86.R_CX -= 1;
+            M.x86.R_SI += inc;
+        }
+        M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+    } else {
+        M.x86.R_AL = fetch_data_byte(M.x86.R_SI);
+        M.x86.R_SI += inc;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xad
+****************************************************************************/
+void x86emuOp_lods_word(u8 X86EMU_UNUSED(op1))
+{
+    int inc;
+    u32 count;
+
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("LODS\tDWORD\n");
+        if (ACCESS_FLAG(F_DF))   /* down */
+            inc = -4;
+        else
+            inc = 4;
+    } else {
+        DECODE_PRINTF("LODS\tWORD\n");
+        if (ACCESS_FLAG(F_DF))   /* down */
+            inc = -2;
+        else
+            inc = 2;
+    }
+    TRACE_AND_STEP();
+    count = 1;
+    if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+        /* dont care whether REPE or REPNE */
+        /* move them until CX is ZERO. */
+        count = M.x86.R_CX;
+        M.x86.R_CX = 0;
+        M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+    }
+    while (count--) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            M.x86.R_EAX = fetch_data_long(M.x86.R_SI);
+        } else {
+            M.x86.R_AX = fetch_data_word(M.x86.R_SI);
+        }
+        M.x86.R_SI += inc;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xae
+****************************************************************************/
+void x86emuOp_scas_byte(u8 X86EMU_UNUSED(op1))
+{
+    s8 val2;
+    int inc;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("SCAS\tBYTE\n");
+    TRACE_AND_STEP();
+    if (ACCESS_FLAG(F_DF))   /* down */
+        inc = -1;
+    else
+        inc = 1;
+    if (M.x86.mode & SYSMODE_PREFIX_REPE) {
+        /* REPE  */
+        /* move them until CX is ZERO. */
+        while (M.x86.R_CX != 0) {
+            val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+            cmp_byte(M.x86.R_AL, val2);
+            M.x86.R_CX -= 1;
+            M.x86.R_DI += inc;
+            if (ACCESS_FLAG(F_ZF) == 0)
+                break;
+        }
+        M.x86.mode &= ~SYSMODE_PREFIX_REPE;
+    } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) {
+        /* REPNE  */
+        /* move them until CX is ZERO. */
+        while (M.x86.R_CX != 0) {
+            val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+            cmp_byte(M.x86.R_AL, val2);
+            M.x86.R_CX -= 1;
+            M.x86.R_DI += inc;
+            if (ACCESS_FLAG(F_ZF))
+                break;          /* zero flag set means equal */
+        }
+        M.x86.mode &= ~SYSMODE_PREFIX_REPNE;
+    } else {
+        val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+        cmp_byte(M.x86.R_AL, val2);
+        M.x86.R_DI += inc;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xaf
+****************************************************************************/
+void x86emuOp_scas_word(u8 X86EMU_UNUSED(op1))
+{
+    int inc;
+    u32 val;
+
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("SCAS\tDWORD\n");
+        if (ACCESS_FLAG(F_DF))   /* down */
+            inc = -4;
+        else
+            inc = 4;
+    } else {
+        DECODE_PRINTF("SCAS\tWORD\n");
+        if (ACCESS_FLAG(F_DF))   /* down */
+            inc = -2;
+        else
+            inc = 2;
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_REPE) {
+        /* REPE  */
+        /* move them until CX is ZERO. */
+        while (M.x86.R_CX != 0) {
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+                cmp_long(M.x86.R_EAX, val);
+            } else {
+                val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+                cmp_word(M.x86.R_AX, (u16)val);
+            }
+            M.x86.R_CX -= 1;
+            M.x86.R_DI += inc;
+            if (ACCESS_FLAG(F_ZF) == 0)
+                break;
+        }
+        M.x86.mode &= ~SYSMODE_PREFIX_REPE;
+    } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) {
+        /* REPNE  */
+        /* move them until CX is ZERO. */
+        while (M.x86.R_CX != 0) {
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+                cmp_long(M.x86.R_EAX, val);
+            } else {
+                val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+                cmp_word(M.x86.R_AX, (u16)val);
+            }
+            M.x86.R_CX -= 1;
+            M.x86.R_DI += inc;
+            if (ACCESS_FLAG(F_ZF))
+                break;          /* zero flag set means equal */
+        }
+        M.x86.mode &= ~SYSMODE_PREFIX_REPNE;
+    } else {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+            cmp_long(M.x86.R_EAX, val);
+        } else {
+            val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+            cmp_word(M.x86.R_AX, (u16)val);
+        }
+        M.x86.R_DI += inc;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb0 - 0xb7
+****************************************************************************/
+void x86emuOp_mov_byte_register_IMM(u8 op1)
+{
+    u8 imm, *ptr;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    ptr = DECODE_RM_BYTE_REGISTER(op1 & 0x7);
+    DECODE_PRINTF(",");
+    imm = fetch_byte_imm();
+    DECODE_PRINTF2("%x\n", imm);
+    TRACE_AND_STEP();
+    *ptr = imm;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb8 - 0xbf
+****************************************************************************/
+void x86emuOp_mov_word_register_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u32 srcval;
+
+    op1 &= 0x7;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        u32 *reg32;
+        reg32 = DECODE_RM_LONG_REGISTER(op1);
+        srcval = fetch_long_imm();
+        DECODE_PRINTF2(",%x\n", srcval);
+        TRACE_AND_STEP();
+        *reg32 = srcval;
+    } else {
+        u16 *reg16;
+        reg16 = DECODE_RM_WORD_REGISTER(op1);
+        srcval = fetch_word_imm();
+        DECODE_PRINTF2(",%x\n", srcval);
+        TRACE_AND_STEP();
+        *reg16 = (u16)srcval;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc0
+****************************************************************************/
+void x86emuOp_opcC0_byte_RM_MEM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg;
+    uint destoffset;
+    u8 destval;
+    u8 amt;
+
+    /*
+     * Yet another weirdo special case instruction format.  Part of
+     * the opcode held below in "RH".  Doubly nested case would
+     * result, except that the decoded instruction
+     */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+
+        switch (rh) {
+        case 0:
+            DECODE_PRINTF("ROL\t");
+            break;
+        case 1:
+            DECODE_PRINTF("ROR\t");
+            break;
+        case 2:
+            DECODE_PRINTF("RCL\t");
+            break;
+        case 3:
+            DECODE_PRINTF("RCR\t");
+            break;
+        case 4:
+            DECODE_PRINTF("SHL\t");
+            break;
+        case 5:
+            DECODE_PRINTF("SHR\t");
+            break;
+        case 6:
+            DECODE_PRINTF("SAL\t");
+            break;
+        case 7:
+            DECODE_PRINTF("SAR\t");
+            break;
+        }
+    }
+#endif
+    /* know operation, decode the mod byte to find the addressing
+       mode. */
+    if (mod < 3) {
+        DECODE_PRINTF("BYTE PTR ");
+        destoffset = decode_rmXX_address(mod, rl);
+        amt = fetch_byte_imm();
+        DECODE_PRINTF2(",%x\n", amt);
+        destval = fetch_data_byte(destoffset);
+        TRACE_AND_STEP();
+        destval = (*opcD0_byte_operation[rh]) (destval, amt);
+        store_data_byte(destoffset, destval);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        amt = fetch_byte_imm();
+        DECODE_PRINTF2(",%x\n", amt);
+        TRACE_AND_STEP();
+        destval = (*opcD0_byte_operation[rh]) (*destreg, amt);
+        *destreg = destval;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc1
+****************************************************************************/
+void x86emuOp_opcC1_word_RM_MEM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+    u8 amt;
+
+    /*
+     * Yet another weirdo special case instruction format.  Part of
+     * the opcode held below in "RH".  Doubly nested case would
+     * result, except that the decoded instruction
+     */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+
+        switch (rh) {
+        case 0:
+            DECODE_PRINTF("ROL\t");
+            break;
+        case 1:
+            DECODE_PRINTF("ROR\t");
+            break;
+        case 2:
+            DECODE_PRINTF("RCL\t");
+            break;
+        case 3:
+            DECODE_PRINTF("RCR\t");
+            break;
+        case 4:
+            DECODE_PRINTF("SHL\t");
+            break;
+        case 5:
+            DECODE_PRINTF("SHR\t");
+            break;
+        case 6:
+            DECODE_PRINTF("SAL\t");
+            break;
+        case 7:
+            DECODE_PRINTF("SAR\t");
+            break;
+        }
+    }
+#endif
+    /* know operation, decode the mod byte to find the addressing
+       mode. */
+    if (mod < 3) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval;
+
+            DECODE_PRINTF("DWORD PTR ");
+            destoffset = decode_rmXX_address(mod, rl);
+            amt = fetch_byte_imm();
+            DECODE_PRINTF2(",%x\n", amt);
+            destval = fetch_data_long(destoffset);
+            TRACE_AND_STEP();
+            destval = (*opcD1_long_operation[rh]) (destval, amt);
+            store_data_long(destoffset, destval);
+        } else {
+            u16 destval;
+
+            DECODE_PRINTF("WORD PTR ");
+            destoffset = decode_rmXX_address(mod, rl);
+            amt = fetch_byte_imm();
+            DECODE_PRINTF2(",%x\n", amt);
+            destval = fetch_data_word(destoffset);
+            TRACE_AND_STEP();
+            destval = (*opcD1_word_operation[rh]) (destval, amt);
+            store_data_word(destoffset, destval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            amt = fetch_byte_imm();
+            DECODE_PRINTF2(",%x\n", amt);
+            TRACE_AND_STEP();
+            *destreg = (*opcD1_long_operation[rh]) (*destreg, amt);
+        } else {
+            u16 *destreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            amt = fetch_byte_imm();
+            DECODE_PRINTF2(",%x\n", amt);
+            TRACE_AND_STEP();
+            *destreg = (*opcD1_word_operation[rh]) (*destreg, amt);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc2
+****************************************************************************/
+void x86emuOp_ret_near_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u16 imm;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("RET\t");
+    imm = fetch_word_imm();
+    DECODE_PRINTF2("%x\n", imm);
+	RETURN_TRACE("RET",M.x86.saved_cs,M.x86.saved_ip);
+	TRACE_AND_STEP();
+    M.x86.R_IP = pop_word();
+    M.x86.R_SP += imm;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc3
+****************************************************************************/
+void x86emuOp_ret_near(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("RET\n");
+	RETURN_TRACE("RET",M.x86.saved_cs,M.x86.saved_ip);
+	TRACE_AND_STEP();
+    M.x86.R_IP = pop_word();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc4
+****************************************************************************/
+void x86emuOp_les_R_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rh, rl;
+    u16 *dstreg;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("LES\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        dstreg = DECODE_RM_WORD_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *dstreg = fetch_data_word(srcoffset);
+        M.x86.R_ES = fetch_data_word(srcoffset + 2);
+    }
+    /* else UNDEFINED!                   register to register */
+
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc5
+****************************************************************************/
+void x86emuOp_lds_R_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rh, rl;
+    u16 *dstreg;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("LDS\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        dstreg = DECODE_RM_WORD_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *dstreg = fetch_data_word(srcoffset);
+        M.x86.R_DS = fetch_data_word(srcoffset + 2);
+    }
+    /* else UNDEFINED! */
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc6
+****************************************************************************/
+void x86emuOp_mov_byte_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg;
+    uint destoffset;
+    u8 imm;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (rh != 0) {
+        DECODE_PRINTF("ILLEGAL DECODE OF OPCODE c6\n");
+        HALT_SYS();
+    }
+    if (mod < 3) {
+        DECODE_PRINTF("BYTE PTR ");
+        destoffset = decode_rmXX_address(mod, rl);
+        imm = fetch_byte_imm();
+        DECODE_PRINTF2(",%2x\n", imm);
+        TRACE_AND_STEP();
+        store_data_byte(destoffset, imm);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        imm = fetch_byte_imm();
+        DECODE_PRINTF2(",%2x\n", imm);
+        TRACE_AND_STEP();
+        *destreg = imm;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc7
+****************************************************************************/
+void x86emuOp_mov_word_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOV\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (rh != 0) {
+        DECODE_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n");
+        HALT_SYS();
+    }
+    if (mod < 3) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 imm;
+
+            DECODE_PRINTF("DWORD PTR ");
+            destoffset = decode_rmXX_address(mod, rl);
+            imm = fetch_long_imm();
+            DECODE_PRINTF2(",%x\n", imm);
+            TRACE_AND_STEP();
+            store_data_long(destoffset, imm);
+        } else {
+            u16 imm;
+
+            DECODE_PRINTF("WORD PTR ");
+            destoffset = decode_rmXX_address(mod, rl);
+            imm = fetch_word_imm();
+            DECODE_PRINTF2(",%x\n", imm);
+            TRACE_AND_STEP();
+            store_data_word(destoffset, imm);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+			u32 *destreg;
+			u32 imm;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            imm = fetch_long_imm();
+            DECODE_PRINTF2(",%x\n", imm);
+            TRACE_AND_STEP();
+            *destreg = imm;
+        } else {
+			u16 *destreg;
+			u16 imm;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            imm = fetch_word_imm();
+            DECODE_PRINTF2(",%x\n", imm);
+            TRACE_AND_STEP();
+            *destreg = imm;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc8
+****************************************************************************/
+void x86emuOp_enter(u8 X86EMU_UNUSED(op1))
+{
+    u16 local,frame_pointer;
+    u8  nesting;
+    int i;
+
+    START_OF_INSTR();
+    local = fetch_word_imm();
+    nesting = fetch_byte_imm();
+    DECODE_PRINTF2("ENTER %x\n", local);
+    DECODE_PRINTF2(",%x\n", nesting);
+    TRACE_AND_STEP();
+    push_word(M.x86.R_BP);
+    frame_pointer = M.x86.R_SP;
+    if (nesting > 0) {
+        for (i = 1; i < nesting; i++) {
+            M.x86.R_BP -= 2;
+            push_word(fetch_data_word_abs(M.x86.R_SS, M.x86.R_BP));
+            }
+        push_word(frame_pointer);
+        }
+    M.x86.R_BP = frame_pointer;
+    M.x86.R_SP = (u16)(M.x86.R_SP - local);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc9
+****************************************************************************/
+void x86emuOp_leave(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("LEAVE\n");
+    TRACE_AND_STEP();
+    M.x86.R_SP = M.x86.R_BP;
+    M.x86.R_BP = pop_word();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xca
+****************************************************************************/
+void x86emuOp_ret_far_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u16 imm;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("RETF\t");
+    imm = fetch_word_imm();
+    DECODE_PRINTF2("%x\n", imm);
+	RETURN_TRACE("RETF",M.x86.saved_cs,M.x86.saved_ip);
+	TRACE_AND_STEP();
+    M.x86.R_IP = pop_word();
+    M.x86.R_CS = pop_word();
+    M.x86.R_SP += imm;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcb
+****************************************************************************/
+void x86emuOp_ret_far(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("RETF\n");
+	RETURN_TRACE("RETF",M.x86.saved_cs,M.x86.saved_ip);
+	TRACE_AND_STEP();
+    M.x86.R_IP = pop_word();
+    M.x86.R_CS = pop_word();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcc
+****************************************************************************/
+void x86emuOp_int3(u8 X86EMU_UNUSED(op1))
+{
+    u16 tmp;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("INT 3\n");
+    tmp = (u16) mem_access_word(3 * 4 + 2);
+    /* access the segment register */
+    TRACE_AND_STEP();
+	if (_X86EMU_intrTab[3]) {
+		(*_X86EMU_intrTab[3])(3);
+    } else {
+        push_word((u16)M.x86.R_FLG);
+        CLEAR_FLAG(F_IF);
+        CLEAR_FLAG(F_TF);
+        push_word(M.x86.R_CS);
+        M.x86.R_CS = mem_access_word(3 * 4 + 2);
+        push_word(M.x86.R_IP);
+        M.x86.R_IP = mem_access_word(3 * 4);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcd
+****************************************************************************/
+void x86emuOp_int_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u16 tmp;
+    u8 intnum;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("INT\t");
+    intnum = fetch_byte_imm();
+    DECODE_PRINTF2("%x\n", intnum);
+    tmp = mem_access_word(intnum * 4 + 2);
+    TRACE_AND_STEP();
+	if (_X86EMU_intrTab[intnum]) {
+		(*_X86EMU_intrTab[intnum])(intnum);
+    } else {
+        push_word((u16)M.x86.R_FLG);
+        CLEAR_FLAG(F_IF);
+        CLEAR_FLAG(F_TF);
+        push_word(M.x86.R_CS);
+        M.x86.R_CS = mem_access_word(intnum * 4 + 2);
+        push_word(M.x86.R_IP);
+        M.x86.R_IP = mem_access_word(intnum * 4);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xce
+****************************************************************************/
+void x86emuOp_into(u8 X86EMU_UNUSED(op1))
+{
+    u16 tmp;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("INTO\n");
+    TRACE_AND_STEP();
+    if (ACCESS_FLAG(F_OF)) {
+        tmp = mem_access_word(4 * 4 + 2);
+		if (_X86EMU_intrTab[4]) {
+			(*_X86EMU_intrTab[4])(4);
+        } else {
+            push_word((u16)M.x86.R_FLG);
+            CLEAR_FLAG(F_IF);
+            CLEAR_FLAG(F_TF);
+            push_word(M.x86.R_CS);
+            M.x86.R_CS = mem_access_word(4 * 4 + 2);
+            push_word(M.x86.R_IP);
+            M.x86.R_IP = mem_access_word(4 * 4);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcf
+****************************************************************************/
+void x86emuOp_iret(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("IRET\n");
+
+    TRACE_AND_STEP();
+
+    M.x86.R_IP = pop_word();
+    M.x86.R_CS = pop_word();
+    M.x86.R_FLG = pop_word();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd0
+****************************************************************************/
+void x86emuOp_opcD0_byte_RM_1(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg;
+    uint destoffset;
+    u8 destval;
+
+    /*
+     * Yet another weirdo special case instruction format.  Part of
+     * the opcode held below in "RH".  Doubly nested case would
+     * result, except that the decoded instruction
+     */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+        switch (rh) {
+        case 0:
+            DECODE_PRINTF("ROL\t");
+            break;
+        case 1:
+            DECODE_PRINTF("ROR\t");
+            break;
+        case 2:
+            DECODE_PRINTF("RCL\t");
+            break;
+        case 3:
+            DECODE_PRINTF("RCR\t");
+            break;
+        case 4:
+            DECODE_PRINTF("SHL\t");
+            break;
+        case 5:
+            DECODE_PRINTF("SHR\t");
+            break;
+        case 6:
+            DECODE_PRINTF("SAL\t");
+            break;
+        case 7:
+            DECODE_PRINTF("SAR\t");
+            break;
+        }
+    }
+#endif
+    /* know operation, decode the mod byte to find the addressing
+       mode. */
+    if (mod < 3) {
+        DECODE_PRINTF("BYTE PTR ");
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",1\n");
+        destval = fetch_data_byte(destoffset);
+        TRACE_AND_STEP();
+        destval = (*opcD0_byte_operation[rh]) (destval, 1);
+        store_data_byte(destoffset, destval);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        DECODE_PRINTF(",1\n");
+        TRACE_AND_STEP();
+        destval = (*opcD0_byte_operation[rh]) (*destreg, 1);
+        *destreg = destval;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd1
+****************************************************************************/
+void x86emuOp_opcD1_word_RM_1(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    /*
+     * Yet another weirdo special case instruction format.  Part of
+     * the opcode held below in "RH".  Doubly nested case would
+     * result, except that the decoded instruction
+     */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+        switch (rh) {
+        case 0:
+            DECODE_PRINTF("ROL\t");
+            break;
+        case 1:
+            DECODE_PRINTF("ROR\t");
+            break;
+        case 2:
+            DECODE_PRINTF("RCL\t");
+            break;
+        case 3:
+            DECODE_PRINTF("RCR\t");
+            break;
+        case 4:
+            DECODE_PRINTF("SHL\t");
+            break;
+        case 5:
+            DECODE_PRINTF("SHR\t");
+            break;
+        case 6:
+            DECODE_PRINTF("SAL\t");
+            break;
+        case 7:
+            DECODE_PRINTF("SAR\t");
+            break;
+        }
+    }
+#endif
+    /* know operation, decode the mod byte to find the addressing
+       mode. */
+    if (mod < 3) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval;
+
+            DECODE_PRINTF("DWORD PTR ");
+            destoffset = decode_rmXX_address(mod, rl);
+            DECODE_PRINTF(",1\n");
+            destval = fetch_data_long(destoffset);
+            TRACE_AND_STEP();
+            destval = (*opcD1_long_operation[rh]) (destval, 1);
+            store_data_long(destoffset, destval);
+        } else {
+            u16 destval;
+
+            DECODE_PRINTF("WORD PTR ");
+            destoffset = decode_rmXX_address(mod, rl);
+            DECODE_PRINTF(",1\n");
+            destval = fetch_data_word(destoffset);
+            TRACE_AND_STEP();
+            destval = (*opcD1_word_operation[rh]) (destval, 1);
+            store_data_word(destoffset, destval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+			u32 destval;
+			u32 *destreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",1\n");
+            TRACE_AND_STEP();
+            destval = (*opcD1_long_operation[rh]) (*destreg, 1);
+            *destreg = destval;
+        } else {
+			u16 destval;
+			u16 *destreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",1\n");
+            TRACE_AND_STEP();
+            destval = (*opcD1_word_operation[rh]) (*destreg, 1);
+            *destreg = destval;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd2
+****************************************************************************/
+void x86emuOp_opcD2_byte_RM_CL(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg;
+    uint destoffset;
+    u8 destval;
+    u8 amt;
+
+    /*
+     * Yet another weirdo special case instruction format.  Part of
+     * the opcode held below in "RH".  Doubly nested case would
+     * result, except that the decoded instruction
+     */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+        switch (rh) {
+        case 0:
+            DECODE_PRINTF("ROL\t");
+            break;
+        case 1:
+            DECODE_PRINTF("ROR\t");
+            break;
+        case 2:
+            DECODE_PRINTF("RCL\t");
+            break;
+        case 3:
+            DECODE_PRINTF("RCR\t");
+            break;
+        case 4:
+            DECODE_PRINTF("SHL\t");
+            break;
+        case 5:
+            DECODE_PRINTF("SHR\t");
+            break;
+        case 6:
+            DECODE_PRINTF("SAL\t");
+            break;
+        case 7:
+            DECODE_PRINTF("SAR\t");
+            break;
+        }
+    }
+#endif
+    /* know operation, decode the mod byte to find the addressing
+       mode. */
+    amt = M.x86.R_CL;
+    if (mod < 3) {
+        DECODE_PRINTF("BYTE PTR ");
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",CL\n");
+        destval = fetch_data_byte(destoffset);
+        TRACE_AND_STEP();
+        destval = (*opcD0_byte_operation[rh]) (destval, amt);
+        store_data_byte(destoffset, destval);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        DECODE_PRINTF(",CL\n");
+        TRACE_AND_STEP();
+        destval = (*opcD0_byte_operation[rh]) (*destreg, amt);
+        *destreg = destval;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd3
+****************************************************************************/
+void x86emuOp_opcD3_word_RM_CL(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+    u8 amt;
+
+    /*
+     * Yet another weirdo special case instruction format.  Part of
+     * the opcode held below in "RH".  Doubly nested case would
+     * result, except that the decoded instruction
+     */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+        switch (rh) {
+        case 0:
+            DECODE_PRINTF("ROL\t");
+            break;
+        case 1:
+            DECODE_PRINTF("ROR\t");
+            break;
+        case 2:
+            DECODE_PRINTF("RCL\t");
+            break;
+        case 3:
+            DECODE_PRINTF("RCR\t");
+            break;
+        case 4:
+            DECODE_PRINTF("SHL\t");
+            break;
+        case 5:
+            DECODE_PRINTF("SHR\t");
+            break;
+        case 6:
+            DECODE_PRINTF("SAL\t");
+            break;
+        case 7:
+            DECODE_PRINTF("SAR\t");
+            break;
+        }
+    }
+#endif
+    /* know operation, decode the mod byte to find the addressing
+       mode. */
+    amt = M.x86.R_CL;
+    if (mod < 3) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval;
+
+            DECODE_PRINTF("DWORD PTR ");
+            destoffset = decode_rmXX_address(mod, rl);
+            DECODE_PRINTF(",CL\n");
+            destval = fetch_data_long(destoffset);
+            TRACE_AND_STEP();
+            destval = (*opcD1_long_operation[rh]) (destval, amt);
+            store_data_long(destoffset, destval);
+        } else {
+            u16 destval;
+
+            DECODE_PRINTF("WORD PTR ");
+            destoffset = decode_rmXX_address(mod, rl);
+            DECODE_PRINTF(",CL\n");
+            destval = fetch_data_word(destoffset);
+            TRACE_AND_STEP();
+            destval = (*opcD1_word_operation[rh]) (destval, amt);
+            store_data_word(destoffset, destval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",CL\n");
+            TRACE_AND_STEP();
+            *destreg = (*opcD1_long_operation[rh]) (*destreg, amt);
+        } else {
+            u16 *destreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",CL\n");
+            TRACE_AND_STEP();
+            *destreg = (*opcD1_word_operation[rh]) (*destreg, amt);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd4
+****************************************************************************/
+void x86emuOp_aam(u8 X86EMU_UNUSED(op1))
+{
+    u8 a;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("AAM\n");
+    a = fetch_byte_imm();      /* this is a stupid encoding. */
+    if (a != 10) {
+        DECODE_PRINTF("ERROR DECODING AAM\n");
+        TRACE_REGS();
+        HALT_SYS();
+    }
+    TRACE_AND_STEP();
+    /* note the type change here --- returning AL and AH in AX. */
+    M.x86.R_AX = aam_word(M.x86.R_AL);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd5
+****************************************************************************/
+void x86emuOp_aad(u8 X86EMU_UNUSED(op1))
+{
+    u8 a;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("AAD\n");
+    a = fetch_byte_imm();
+    TRACE_AND_STEP();
+    M.x86.R_AX = aad_word(M.x86.R_AX);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/* opcode 0xd6 ILLEGAL OPCODE */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd7
+****************************************************************************/
+void x86emuOp_xlat(u8 X86EMU_UNUSED(op1))
+{
+    u16 addr;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("XLAT\n");
+    TRACE_AND_STEP();
+	addr = (u16)(M.x86.R_BX + (u8)M.x86.R_AL);
+    M.x86.R_AL = fetch_data_byte(addr);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/* instuctions  D8 .. DF are in i87_ops.c */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe0
+****************************************************************************/
+void x86emuOp_loopne(u8 X86EMU_UNUSED(op1))
+{
+    s16 ip;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("LOOPNE\t");
+    ip = (s8) fetch_byte_imm();
+    ip += (s16) M.x86.R_IP;
+    DECODE_PRINTF2("%04x\n", ip);
+    TRACE_AND_STEP();
+    M.x86.R_CX -= 1;
+    if (M.x86.R_CX != 0 && !ACCESS_FLAG(F_ZF))      /* CX != 0 and !ZF */
+        M.x86.R_IP = ip;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe1
+****************************************************************************/
+void x86emuOp_loope(u8 X86EMU_UNUSED(op1))
+{
+    s16 ip;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("LOOPE\t");
+    ip = (s8) fetch_byte_imm();
+    ip += (s16) M.x86.R_IP;
+    DECODE_PRINTF2("%04x\n", ip);
+    TRACE_AND_STEP();
+    M.x86.R_CX -= 1;
+    if (M.x86.R_CX != 0 && ACCESS_FLAG(F_ZF))       /* CX != 0 and ZF */
+        M.x86.R_IP = ip;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe2
+****************************************************************************/
+void x86emuOp_loop(u8 X86EMU_UNUSED(op1))
+{
+    s16 ip;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("LOOP\t");
+    ip = (s8) fetch_byte_imm();
+    ip += (s16) M.x86.R_IP;
+    DECODE_PRINTF2("%04x\n", ip);
+    TRACE_AND_STEP();
+    M.x86.R_CX -= 1;
+    if (M.x86.R_CX != 0)
+        M.x86.R_IP = ip;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe3
+****************************************************************************/
+void x86emuOp_jcxz(u8 X86EMU_UNUSED(op1))
+{
+    u16 target;
+    s8  offset;
+
+    /* jump to byte offset if overflow flag is set */
+    START_OF_INSTR();
+    DECODE_PRINTF("JCXZ\t");
+    offset = (s8)fetch_byte_imm();
+    target = (u16)(M.x86.R_IP + offset);
+    DECODE_PRINTF2("%x\n", target);
+    TRACE_AND_STEP();
+    if (M.x86.R_CX == 0)
+        M.x86.R_IP = target;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe4
+****************************************************************************/
+void x86emuOp_in_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u8 port;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("IN\t");
+	port = (u8) fetch_byte_imm();
+    DECODE_PRINTF2("%x,AL\n", port);
+    TRACE_AND_STEP();
+    M.x86.R_AL = (*sys_inb)(port);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe5
+****************************************************************************/
+void x86emuOp_in_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u8 port;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("IN\t");
+	port = (u8) fetch_byte_imm();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF2("EAX,%x\n", port);
+    } else {
+        DECODE_PRINTF2("AX,%x\n", port);
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        M.x86.R_EAX = (*sys_inl)(port);
+    } else {
+        M.x86.R_AX = (*sys_inw)(port);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe6
+****************************************************************************/
+void x86emuOp_out_byte_IMM_AL(u8 X86EMU_UNUSED(op1))
+{
+    u8 port;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("OUT\t");
+	port = (u8) fetch_byte_imm();
+    DECODE_PRINTF2("%x,AL\n", port);
+    TRACE_AND_STEP();
+    (*sys_outb)(port, M.x86.R_AL);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe7
+****************************************************************************/
+void x86emuOp_out_word_IMM_AX(u8 X86EMU_UNUSED(op1))
+{
+    u8 port;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("OUT\t");
+	port = (u8) fetch_byte_imm();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF2("%x,EAX\n", port);
+    } else {
+        DECODE_PRINTF2("%x,AX\n", port);
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        (*sys_outl)(port, M.x86.R_EAX);
+    } else {
+        (*sys_outw)(port, M.x86.R_AX);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe8
+****************************************************************************/
+void x86emuOp_call_near_IMM(u8 X86EMU_UNUSED(op1))
+{
+    s16 ip;
+
+    START_OF_INSTR();
+	DECODE_PRINTF("CALL\t");
+	ip = (s16) fetch_word_imm();
+	ip += (s16) M.x86.R_IP;    /* CHECK SIGN */
+	DECODE_PRINTF2("%04x\n", ip);
+	CALL_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, ip, "");
+    TRACE_AND_STEP();
+    push_word(M.x86.R_IP);
+    M.x86.R_IP = ip;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe9
+****************************************************************************/
+void x86emuOp_jump_near_IMM(u8 X86EMU_UNUSED(op1))
+{
+    int ip;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("JMP\t");
+    ip = (s16)fetch_word_imm();
+    ip += (s16)M.x86.R_IP;
+    DECODE_PRINTF2("%04x\n", ip);
+    TRACE_AND_STEP();
+    M.x86.R_IP = (u16)ip;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xea
+****************************************************************************/
+void x86emuOp_jump_far_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u16 cs, ip;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("JMP\tFAR ");
+    ip = fetch_word_imm();
+    cs = fetch_word_imm();
+    DECODE_PRINTF2("%04x:", cs);
+    DECODE_PRINTF2("%04x\n", ip);
+    TRACE_AND_STEP();
+    M.x86.R_IP = ip;
+    M.x86.R_CS = cs;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xeb
+****************************************************************************/
+void x86emuOp_jump_byte_IMM(u8 X86EMU_UNUSED(op1))
+{
+    u16 target;
+    s8 offset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("JMP\t");
+    offset = (s8)fetch_byte_imm();
+    target = (u16)(M.x86.R_IP + offset);
+    DECODE_PRINTF2("%x\n", target);
+    TRACE_AND_STEP();
+    M.x86.R_IP = target;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xec
+****************************************************************************/
+void x86emuOp_in_byte_AL_DX(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("IN\tAL,DX\n");
+    TRACE_AND_STEP();
+    M.x86.R_AL = (*sys_inb)(M.x86.R_DX);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xed
+****************************************************************************/
+void x86emuOp_in_word_AX_DX(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("IN\tEAX,DX\n");
+    } else {
+        DECODE_PRINTF("IN\tAX,DX\n");
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        M.x86.R_EAX = (*sys_inl)(M.x86.R_DX);
+    } else {
+        M.x86.R_AX = (*sys_inw)(M.x86.R_DX);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xee
+****************************************************************************/
+void x86emuOp_out_byte_DX_AL(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("OUT\tDX,AL\n");
+    TRACE_AND_STEP();
+    (*sys_outb)(M.x86.R_DX, M.x86.R_AL);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xef
+****************************************************************************/
+void x86emuOp_out_word_DX_AX(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        DECODE_PRINTF("OUT\tDX,EAX\n");
+    } else {
+        DECODE_PRINTF("OUT\tDX,AX\n");
+    }
+    TRACE_AND_STEP();
+    if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+        (*sys_outl)(M.x86.R_DX, M.x86.R_EAX);
+    } else {
+        (*sys_outw)(M.x86.R_DX, M.x86.R_AX);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf0
+****************************************************************************/
+void x86emuOp_lock(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("LOCK:\n");
+    TRACE_AND_STEP();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/*opcode 0xf1 ILLEGAL OPERATION */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf2
+****************************************************************************/
+void x86emuOp_repne(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("REPNE\n");
+    TRACE_AND_STEP();
+    M.x86.mode |= SYSMODE_PREFIX_REPNE;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf3
+****************************************************************************/
+void x86emuOp_repe(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("REPE\n");
+    TRACE_AND_STEP();
+    M.x86.mode |= SYSMODE_PREFIX_REPE;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf4
+****************************************************************************/
+void x86emuOp_halt(u8 X86EMU_UNUSED(op1))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("HALT\n");
+    TRACE_AND_STEP();
+    HALT_SYS();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf5
+****************************************************************************/
+void x86emuOp_cmc(u8 X86EMU_UNUSED(op1))
+{
+    /* complement the carry flag. */
+    START_OF_INSTR();
+    DECODE_PRINTF("CMC\n");
+    TRACE_AND_STEP();
+    TOGGLE_FLAG(F_CF);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf6
+****************************************************************************/
+void x86emuOp_opcF6_byte_RM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    u8 *destreg;
+    uint destoffset;
+    u8 destval, srcval;
+
+    /* long, drawn out code follows.  Double switch for a total
+       of 32 cases.  */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    DECODE_PRINTF(opF6_names[rh]);
+    if (mod < 3) {
+        DECODE_PRINTF("BYTE PTR ");
+        destoffset = decode_rmXX_address(mod, rl);
+        destval = fetch_data_byte(destoffset);
+
+        switch (rh) {
+        case 0:         /* test byte imm */
+            DECODE_PRINTF(",");
+            srcval = fetch_byte_imm();
+            DECODE_PRINTF2("%02x\n", srcval);
+            TRACE_AND_STEP();
+            test_byte(destval, srcval);
+            break;
+        case 1:
+            DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+            HALT_SYS();
+            break;
+        case 2:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            destval = not_byte(destval);
+            store_data_byte(destoffset, destval);
+            break;
+        case 3:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            destval = neg_byte(destval);
+            store_data_byte(destoffset, destval);
+            break;
+        case 4:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            mul_byte(destval);
+            break;
+        case 5:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            imul_byte(destval);
+            break;
+        case 6:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            div_byte(destval);
+            break;
+        default:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            idiv_byte(destval);
+            break;
+        }
+    } else {                     /* mod=11 */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        switch (rh) {
+        case 0:         /* test byte imm */
+            DECODE_PRINTF(",");
+            srcval = fetch_byte_imm();
+            DECODE_PRINTF2("%02x\n", srcval);
+            TRACE_AND_STEP();
+            test_byte(*destreg, srcval);
+            break;
+        case 1:
+            DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+            HALT_SYS();
+            break;
+        case 2:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = not_byte(*destreg);
+            break;
+        case 3:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = neg_byte(*destreg);
+            break;
+        case 4:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            mul_byte(*destreg);      /*!!!  */
+            break;
+        case 5:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            imul_byte(*destreg);
+            break;
+        case 6:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            div_byte(*destreg);
+            break;
+        default:
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            idiv_byte(*destreg);
+            break;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf7
+****************************************************************************/
+void x86emuOp_opcF7_word_RM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    DECODE_PRINTF(opF6_names[rh]);
+    if (mod < 3) {
+
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval, srcval;
+
+            DECODE_PRINTF("DWORD PTR ");
+            destoffset = decode_rmXX_address(mod, rl);
+            destval = fetch_data_long(destoffset);
+
+            switch (rh) {
+            case 0:
+                DECODE_PRINTF(",");
+                srcval = fetch_long_imm();
+                DECODE_PRINTF2("%x\n", srcval);
+                TRACE_AND_STEP();
+                test_long(destval, srcval);
+                break;
+            case 1:
+                DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n");
+                HALT_SYS();
+                break;
+            case 2:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                destval = not_long(destval);
+                store_data_long(destoffset, destval);
+                break;
+            case 3:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                destval = neg_long(destval);
+                store_data_long(destoffset, destval);
+                break;
+            case 4:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                mul_long(destval);
+                break;
+            case 5:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                imul_long(destval);
+                break;
+            case 6:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                div_long(destval);
+                break;
+            case 7:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                idiv_long(destval);
+                break;
+            }
+        } else {
+            u16 destval, srcval;
+
+            DECODE_PRINTF("WORD PTR ");
+            destoffset = decode_rmXX_address(mod, rl);
+            destval = fetch_data_word(destoffset);
+
+            switch (rh) {
+            case 0:         /* test word imm */
+                DECODE_PRINTF(",");
+                srcval = fetch_word_imm();
+                DECODE_PRINTF2("%x\n", srcval);
+                TRACE_AND_STEP();
+                test_word(destval, srcval);
+                break;
+            case 1:
+                DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n");
+                HALT_SYS();
+                break;
+            case 2:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                destval = not_word(destval);
+                store_data_word(destoffset, destval);
+                break;
+            case 3:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                destval = neg_word(destval);
+                store_data_word(destoffset, destval);
+                break;
+            case 4:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                mul_word(destval);
+                break;
+            case 5:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                imul_word(destval);
+                break;
+            case 6:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                div_word(destval);
+                break;
+            case 7:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                idiv_word(destval);
+                break;
+            }
+        }
+
+    } else {                     /* mod=11 */
+
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u32 srcval;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+
+            switch (rh) {
+            case 0:         /* test word imm */
+                DECODE_PRINTF(",");
+                srcval = fetch_long_imm();
+                DECODE_PRINTF2("%x\n", srcval);
+                TRACE_AND_STEP();
+                test_long(*destreg, srcval);
+                break;
+            case 1:
+                DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+                HALT_SYS();
+                break;
+            case 2:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                *destreg = not_long(*destreg);
+                break;
+            case 3:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                *destreg = neg_long(*destreg);
+                break;
+            case 4:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                mul_long(*destreg);      /*!!!  */
+                break;
+            case 5:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                imul_long(*destreg);
+                break;
+            case 6:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                div_long(*destreg);
+                break;
+            case 7:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                idiv_long(*destreg);
+                break;
+            }
+        } else {
+            u16 *destreg;
+            u16 srcval;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+
+            switch (rh) {
+            case 0:         /* test word imm */
+                DECODE_PRINTF(",");
+                srcval = fetch_word_imm();
+                DECODE_PRINTF2("%x\n", srcval);
+                TRACE_AND_STEP();
+                test_word(*destreg, srcval);
+                break;
+            case 1:
+                DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+                HALT_SYS();
+                break;
+            case 2:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                *destreg = not_word(*destreg);
+                break;
+            case 3:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                *destreg = neg_word(*destreg);
+                break;
+            case 4:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                mul_word(*destreg);      /*!!!  */
+                break;
+            case 5:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                imul_word(*destreg);
+                break;
+            case 6:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                div_word(*destreg);
+                break;
+            case 7:
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                idiv_word(*destreg);
+                break;
+            }
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf8
+****************************************************************************/
+void x86emuOp_clc(u8 X86EMU_UNUSED(op1))
+{
+    /* clear the carry flag. */
+    START_OF_INSTR();
+    DECODE_PRINTF("CLC\n");
+    TRACE_AND_STEP();
+    CLEAR_FLAG(F_CF);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf9
+****************************************************************************/
+void x86emuOp_stc(u8 X86EMU_UNUSED(op1))
+{
+    /* set the carry flag. */
+    START_OF_INSTR();
+    DECODE_PRINTF("STC\n");
+    TRACE_AND_STEP();
+    SET_FLAG(F_CF);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfa
+****************************************************************************/
+void x86emuOp_cli(u8 X86EMU_UNUSED(op1))
+{
+    /* clear interrupts. */
+    START_OF_INSTR();
+    DECODE_PRINTF("CLI\n");
+    TRACE_AND_STEP();
+    CLEAR_FLAG(F_IF);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfb
+****************************************************************************/
+void x86emuOp_sti(u8 X86EMU_UNUSED(op1))
+{
+    /* enable  interrupts. */
+    START_OF_INSTR();
+    DECODE_PRINTF("STI\n");
+    TRACE_AND_STEP();
+    SET_FLAG(F_IF);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfc
+****************************************************************************/
+void x86emuOp_cld(u8 X86EMU_UNUSED(op1))
+{
+    /* clear interrupts. */
+    START_OF_INSTR();
+    DECODE_PRINTF("CLD\n");
+    TRACE_AND_STEP();
+    CLEAR_FLAG(F_DF);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfd
+****************************************************************************/
+void x86emuOp_std(u8 X86EMU_UNUSED(op1))
+{
+    /* clear interrupts. */
+    START_OF_INSTR();
+    DECODE_PRINTF("STD\n");
+    TRACE_AND_STEP();
+    SET_FLAG(F_DF);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfe
+****************************************************************************/
+void x86emuOp_opcFE_byte_RM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rh, rl;
+    u8 destval;
+    uint destoffset;
+    u8 *destreg;
+
+    /* Yet another special case instruction. */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+
+        switch (rh) {
+        case 0:
+            DECODE_PRINTF("INC\t");
+            break;
+        case 1:
+            DECODE_PRINTF("DEC\t");
+            break;
+        case 2:
+        case 3:
+        case 4:
+        case 5:
+        case 6:
+        case 7:
+            DECODE_PRINTF2("ILLEGAL OP MAJOR OP 0xFE MINOR OP %x \n", mod);
+            HALT_SYS();
+            break;
+        }
+    }
+#endif
+    if (mod < 3) {
+        DECODE_PRINTF("BYTE PTR ");
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF("\n");
+        destval = fetch_data_byte(destoffset);
+        TRACE_AND_STEP();
+        if (rh == 0)
+          destval = inc_byte(destval);
+        else
+          destval = dec_byte(destval);
+        store_data_byte(destoffset, destval);
+    } else {
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        if (rh == 0)
+          *destreg = inc_byte(*destreg);
+        else
+          *destreg = dec_byte(*destreg);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xff
+****************************************************************************/
+void x86emuOp_opcFF_word_RM(u8 X86EMU_UNUSED(op1))
+{
+    int mod, rh, rl;
+    uint destoffset = 0;
+	u16 *destreg;
+	u16 destval,destval2;
+
+    /* Yet another special case instruction. */
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+    if (DEBUG_DECODE()) {
+        /* XXX DECODE_PRINTF may be changed to something more
+           general, so that it is important to leave the strings
+           in the same format, even though the result is that the
+           above test is done twice. */
+
+        switch (rh) {
+        case 0:
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                DECODE_PRINTF("INC\tDWORD PTR ");
+            } else {
+                DECODE_PRINTF("INC\tWORD PTR ");
+            }
+            break;
+        case 1:
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                DECODE_PRINTF("DEC\tDWORD PTR ");
+            } else {
+                DECODE_PRINTF("DEC\tWORD PTR ");
+            }
+            break;
+        case 2:
+            DECODE_PRINTF("CALL\t ");
+            break;
+        case 3:
+            DECODE_PRINTF("CALL\tFAR ");
+            break;
+        case 4:
+            DECODE_PRINTF("JMP\t");
+            break;
+        case 5:
+            DECODE_PRINTF("JMP\tFAR ");
+            break;
+        case 6:
+            DECODE_PRINTF("PUSH\t");
+            break;
+        case 7:
+            DECODE_PRINTF("ILLEGAL DECODING OF OPCODE FF\t");
+            HALT_SYS();
+            break;
+        }
+    }
+#endif
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF("\n");
+        switch (rh) {
+        case 0:         /* inc word ptr ... */
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                u32 destval;
+
+                destval = fetch_data_long(destoffset);
+                TRACE_AND_STEP();
+                destval = inc_long(destval);
+                store_data_long(destoffset, destval);
+            } else {
+                u16 destval;
+
+                destval = fetch_data_word(destoffset);
+                TRACE_AND_STEP();
+                destval = inc_word(destval);
+                store_data_word(destoffset, destval);
+            }
+            break;
+        case 1:         /* dec word ptr ... */
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                u32 destval;
+
+                destval = fetch_data_long(destoffset);
+                TRACE_AND_STEP();
+                destval = dec_long(destval);
+                store_data_long(destoffset, destval);
+            } else {
+                u16 destval;
+
+                destval = fetch_data_word(destoffset);
+                TRACE_AND_STEP();
+                destval = dec_word(destval);
+                store_data_word(destoffset, destval);
+            }
+            break;
+        case 2:         /* call word ptr ... */
+            destval = fetch_data_word(destoffset);
+            TRACE_AND_STEP();
+            push_word(M.x86.R_IP);
+            M.x86.R_IP = destval;
+            break;
+        case 3:         /* call far ptr ... */
+            destval = fetch_data_word(destoffset);
+            destval2 = fetch_data_word(destoffset + 2);
+            TRACE_AND_STEP();
+            push_word(M.x86.R_CS);
+            M.x86.R_CS = destval2;
+            push_word(M.x86.R_IP);
+            M.x86.R_IP = destval;
+            break;
+        case 4:         /* jmp word ptr ... */
+            destval = fetch_data_word(destoffset);
+            TRACE_AND_STEP();
+            M.x86.R_IP = destval;
+            break;
+        case 5:         /* jmp far ptr ... */
+            destval = fetch_data_word(destoffset);
+            destval2 = fetch_data_word(destoffset + 2);
+            TRACE_AND_STEP();
+            M.x86.R_IP = destval;
+            M.x86.R_CS = destval2;
+            break;
+        case 6:         /*  push word ptr ... */
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                u32 destval;
+
+                destval = fetch_data_long(destoffset);
+                TRACE_AND_STEP();
+                push_long(destval);
+            } else {
+                u16 destval;
+
+                destval = fetch_data_word(destoffset);
+                TRACE_AND_STEP();
+                push_word(destval);
+            }
+            break;
+        }
+    } else {
+        switch (rh) {
+        case 0:
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                u32 *destreg;
+
+                destreg = DECODE_RM_LONG_REGISTER(rl);
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                *destreg = inc_long(*destreg);
+            } else {
+                u16 *destreg;
+
+                destreg = DECODE_RM_WORD_REGISTER(rl);
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                *destreg = inc_word(*destreg);
+            }
+            break;
+        case 1:
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                u32 *destreg;
+
+                destreg = DECODE_RM_LONG_REGISTER(rl);
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                *destreg = dec_long(*destreg);
+            } else {
+                u16 *destreg;
+
+                destreg = DECODE_RM_WORD_REGISTER(rl);
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                *destreg = dec_word(*destreg);
+            }
+            break;
+        case 2:         /* call word ptr ... */
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            push_word(M.x86.R_IP);
+            M.x86.R_IP = *destreg;
+            break;
+        case 3:         /* jmp far ptr ... */
+            DECODE_PRINTF("OPERATION UNDEFINED 0XFF \n");
+            TRACE_AND_STEP();
+            HALT_SYS();
+            break;
+
+        case 4:         /* jmp  ... */
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            M.x86.R_IP = (u16) (*destreg);
+            break;
+        case 5:         /* jmp far ptr ... */
+            DECODE_PRINTF("OPERATION UNDEFINED 0XFF \n");
+            TRACE_AND_STEP();
+            HALT_SYS();
+            break;
+        case 6:
+            if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+                u32 *destreg;
+
+                destreg = DECODE_RM_LONG_REGISTER(rl);
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                push_long(*destreg);
+            } else {
+                u16 *destreg;
+
+                destreg = DECODE_RM_WORD_REGISTER(rl);
+                DECODE_PRINTF("\n");
+                TRACE_AND_STEP();
+                push_word(*destreg);
+            }
+            break;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/***************************************************************************
+ * Single byte operation code table:
+ **************************************************************************/
+void (*x86emu_optab[256])(u8) __attribute__ ((section(".got2"))) =
+{
+/*  0x00 */ x86emuOp_genop_byte_RM_R,
+/*  0x01 */ x86emuOp_genop_word_RM_R,
+/*  0x02 */ x86emuOp_genop_byte_R_RM,
+/*  0x03 */ x86emuOp_genop_word_R_RM,
+/*  0x04 */ x86emuOp_genop_byte_AL_IMM,
+/*  0x05 */ x86emuOp_genop_word_AX_IMM,
+/*  0x06 */ x86emuOp_push_ES,
+/*  0x07 */ x86emuOp_pop_ES,
+
+/*  0x08 */ x86emuOp_genop_byte_RM_R,
+/*  0x09 */ x86emuOp_genop_word_RM_R,
+/*  0x0a */ x86emuOp_genop_byte_R_RM,
+/*  0x0b */ x86emuOp_genop_word_R_RM,
+/*  0x0c */ x86emuOp_genop_byte_AL_IMM,
+/*  0x0d */ x86emuOp_genop_word_AX_IMM,
+/*  0x0e */ x86emuOp_push_CS,
+/*  0x0f */ x86emuOp_two_byte,
+
+/*  0x10 */ x86emuOp_genop_byte_RM_R,
+/*  0x11 */ x86emuOp_genop_word_RM_R,
+/*  0x12 */ x86emuOp_genop_byte_R_RM,
+/*  0x13 */ x86emuOp_genop_word_R_RM,
+/*  0x14 */ x86emuOp_genop_byte_AL_IMM,
+/*  0x15 */ x86emuOp_genop_word_AX_IMM,
+/*  0x16 */ x86emuOp_push_SS,
+/*  0x17 */ x86emuOp_pop_SS,
+
+/*  0x18 */ x86emuOp_genop_byte_RM_R,
+/*  0x19 */ x86emuOp_genop_word_RM_R,
+/*  0x1a */ x86emuOp_genop_byte_R_RM,
+/*  0x1b */ x86emuOp_genop_word_R_RM,
+/*  0x1c */ x86emuOp_genop_byte_AL_IMM,
+/*  0x1d */ x86emuOp_genop_word_AX_IMM,
+/*  0x1e */ x86emuOp_push_DS,
+/*  0x1f */ x86emuOp_pop_DS,
+
+/*  0x20 */ x86emuOp_genop_byte_RM_R,
+/*  0x21 */ x86emuOp_genop_word_RM_R,
+/*  0x22 */ x86emuOp_genop_byte_R_RM,
+/*  0x23 */ x86emuOp_genop_word_R_RM,
+/*  0x24 */ x86emuOp_genop_byte_AL_IMM,
+/*  0x25 */ x86emuOp_genop_word_AX_IMM,
+/*  0x26 */ x86emuOp_segovr_ES,
+/*  0x27 */ x86emuOp_daa,
+
+/*  0x28 */ x86emuOp_genop_byte_RM_R,
+/*  0x29 */ x86emuOp_genop_word_RM_R,
+/*  0x2a */ x86emuOp_genop_byte_R_RM,
+/*  0x2b */ x86emuOp_genop_word_R_RM,
+/*  0x2c */ x86emuOp_genop_byte_AL_IMM,
+/*  0x2d */ x86emuOp_genop_word_AX_IMM,
+/*  0x2e */ x86emuOp_segovr_CS,
+/*  0x2f */ x86emuOp_das,
+
+/*  0x30 */ x86emuOp_genop_byte_RM_R,
+/*  0x31 */ x86emuOp_genop_word_RM_R,
+/*  0x32 */ x86emuOp_genop_byte_R_RM,
+/*  0x33 */ x86emuOp_genop_word_R_RM,
+/*  0x34 */ x86emuOp_genop_byte_AL_IMM,
+/*  0x35 */ x86emuOp_genop_word_AX_IMM,
+/*  0x36 */ x86emuOp_segovr_SS,
+/*  0x37 */ x86emuOp_aaa,
+
+/*  0x38 */ x86emuOp_genop_byte_RM_R,
+/*  0x39 */ x86emuOp_genop_word_RM_R,
+/*  0x3a */ x86emuOp_genop_byte_R_RM,
+/*  0x3b */ x86emuOp_genop_word_R_RM,
+/*  0x3c */ x86emuOp_genop_byte_AL_IMM,
+/*  0x3d */ x86emuOp_genop_word_AX_IMM,
+/*  0x3e */ x86emuOp_segovr_DS,
+/*  0x3f */ x86emuOp_aas,
+
+/*  0x40 */ x86emuOp_inc_register,
+/*  0x41 */ x86emuOp_inc_register,
+/*  0x42 */ x86emuOp_inc_register,
+/*  0x43 */ x86emuOp_inc_register,
+/*  0x44 */ x86emuOp_inc_register,
+/*  0x45 */ x86emuOp_inc_register,
+/*  0x46 */ x86emuOp_inc_register,
+/*  0x47 */ x86emuOp_inc_register,
+
+/*  0x48 */ x86emuOp_dec_register,
+/*  0x49 */ x86emuOp_dec_register,
+/*  0x4a */ x86emuOp_dec_register,
+/*  0x4b */ x86emuOp_dec_register,
+/*  0x4c */ x86emuOp_dec_register,
+/*  0x4d */ x86emuOp_dec_register,
+/*  0x4e */ x86emuOp_dec_register,
+/*  0x4f */ x86emuOp_dec_register,
+
+/*  0x50 */ x86emuOp_push_register,
+/*  0x51 */ x86emuOp_push_register,
+/*  0x52 */ x86emuOp_push_register,
+/*  0x53 */ x86emuOp_push_register,
+/*  0x54 */ x86emuOp_push_register,
+/*  0x55 */ x86emuOp_push_register,
+/*  0x56 */ x86emuOp_push_register,
+/*  0x57 */ x86emuOp_push_register,
+
+/*  0x58 */ x86emuOp_pop_register,
+/*  0x59 */ x86emuOp_pop_register,
+/*  0x5a */ x86emuOp_pop_register,
+/*  0x5b */ x86emuOp_pop_register,
+/*  0x5c */ x86emuOp_pop_register,
+/*  0x5d */ x86emuOp_pop_register,
+/*  0x5e */ x86emuOp_pop_register,
+/*  0x5f */ x86emuOp_pop_register,
+
+/*  0x60 */ x86emuOp_push_all,
+/*  0x61 */ x86emuOp_pop_all,
+/*  0x62 */ x86emuOp_illegal_op,   /* bound */
+/*  0x63 */ x86emuOp_illegal_op,   /* arpl */
+/*  0x64 */ x86emuOp_segovr_FS,
+/*  0x65 */ x86emuOp_segovr_GS,
+/*  0x66 */ x86emuOp_prefix_data,
+/*  0x67 */ x86emuOp_prefix_addr,
+
+/*  0x68 */ x86emuOp_push_word_IMM,
+/*  0x69 */ x86emuOp_imul_word_IMM,
+/*  0x6a */ x86emuOp_push_byte_IMM,
+/*  0x6b */ x86emuOp_imul_byte_IMM,
+/*  0x6c */ x86emuOp_ins_byte,
+/*  0x6d */ x86emuOp_ins_word,
+/*  0x6e */ x86emuOp_outs_byte,
+/*  0x6f */ x86emuOp_outs_word,
+
+/*  0x70 */ x86emuOp_jump_near_cond,
+/*  0x71 */ x86emuOp_jump_near_cond,
+/*  0x72 */ x86emuOp_jump_near_cond,
+/*  0x73 */ x86emuOp_jump_near_cond,
+/*  0x74 */ x86emuOp_jump_near_cond,
+/*  0x75 */ x86emuOp_jump_near_cond,
+/*  0x76 */ x86emuOp_jump_near_cond,
+/*  0x77 */ x86emuOp_jump_near_cond,
+
+/*  0x78 */ x86emuOp_jump_near_cond,
+/*  0x79 */ x86emuOp_jump_near_cond,
+/*  0x7a */ x86emuOp_jump_near_cond,
+/*  0x7b */ x86emuOp_jump_near_cond,
+/*  0x7c */ x86emuOp_jump_near_cond,
+/*  0x7d */ x86emuOp_jump_near_cond,
+/*  0x7e */ x86emuOp_jump_near_cond,
+/*  0x7f */ x86emuOp_jump_near_cond,
+
+/*  0x80 */ x86emuOp_opc80_byte_RM_IMM,
+/*  0x81 */ x86emuOp_opc81_word_RM_IMM,
+/*  0x82 */ x86emuOp_opc82_byte_RM_IMM,
+/*  0x83 */ x86emuOp_opc83_word_RM_IMM,
+/*  0x84 */ x86emuOp_test_byte_RM_R,
+/*  0x85 */ x86emuOp_test_word_RM_R,
+/*  0x86 */ x86emuOp_xchg_byte_RM_R,
+/*  0x87 */ x86emuOp_xchg_word_RM_R,
+
+/*  0x88 */ x86emuOp_mov_byte_RM_R,
+/*  0x89 */ x86emuOp_mov_word_RM_R,
+/*  0x8a */ x86emuOp_mov_byte_R_RM,
+/*  0x8b */ x86emuOp_mov_word_R_RM,
+/*  0x8c */ x86emuOp_mov_word_RM_SR,
+/*  0x8d */ x86emuOp_lea_word_R_M,
+/*  0x8e */ x86emuOp_mov_word_SR_RM,
+/*  0x8f */ x86emuOp_pop_RM,
+
+/*  0x90 */ x86emuOp_nop,
+/*  0x91 */ x86emuOp_xchg_word_AX_register,
+/*  0x92 */ x86emuOp_xchg_word_AX_register,
+/*  0x93 */ x86emuOp_xchg_word_AX_register,
+/*  0x94 */ x86emuOp_xchg_word_AX_register,
+/*  0x95 */ x86emuOp_xchg_word_AX_register,
+/*  0x96 */ x86emuOp_xchg_word_AX_register,
+/*  0x97 */ x86emuOp_xchg_word_AX_register,
+
+/*  0x98 */ x86emuOp_cbw,
+/*  0x99 */ x86emuOp_cwd,
+/*  0x9a */ x86emuOp_call_far_IMM,
+/*  0x9b */ x86emuOp_wait,
+/*  0x9c */ x86emuOp_pushf_word,
+/*  0x9d */ x86emuOp_popf_word,
+/*  0x9e */ x86emuOp_sahf,
+/*  0x9f */ x86emuOp_lahf,
+
+/*  0xa0 */ x86emuOp_mov_AL_M_IMM,
+/*  0xa1 */ x86emuOp_mov_AX_M_IMM,
+/*  0xa2 */ x86emuOp_mov_M_AL_IMM,
+/*  0xa3 */ x86emuOp_mov_M_AX_IMM,
+/*  0xa4 */ x86emuOp_movs_byte,
+/*  0xa5 */ x86emuOp_movs_word,
+/*  0xa6 */ x86emuOp_cmps_byte,
+/*  0xa7 */ x86emuOp_cmps_word,
+/*  0xa8 */ x86emuOp_test_AL_IMM,
+/*  0xa9 */ x86emuOp_test_AX_IMM,
+/*  0xaa */ x86emuOp_stos_byte,
+/*  0xab */ x86emuOp_stos_word,
+/*  0xac */ x86emuOp_lods_byte,
+/*  0xad */ x86emuOp_lods_word,
+/*  0xac */ x86emuOp_scas_byte,
+/*  0xad */ x86emuOp_scas_word,
+
+/*  0xb0 */ x86emuOp_mov_byte_register_IMM,
+/*  0xb1 */ x86emuOp_mov_byte_register_IMM,
+/*  0xb2 */ x86emuOp_mov_byte_register_IMM,
+/*  0xb3 */ x86emuOp_mov_byte_register_IMM,
+/*  0xb4 */ x86emuOp_mov_byte_register_IMM,
+/*  0xb5 */ x86emuOp_mov_byte_register_IMM,
+/*  0xb6 */ x86emuOp_mov_byte_register_IMM,
+/*  0xb7 */ x86emuOp_mov_byte_register_IMM,
+
+/*  0xb8 */ x86emuOp_mov_word_register_IMM,
+/*  0xb9 */ x86emuOp_mov_word_register_IMM,
+/*  0xba */ x86emuOp_mov_word_register_IMM,
+/*  0xbb */ x86emuOp_mov_word_register_IMM,
+/*  0xbc */ x86emuOp_mov_word_register_IMM,
+/*  0xbd */ x86emuOp_mov_word_register_IMM,
+/*  0xbe */ x86emuOp_mov_word_register_IMM,
+/*  0xbf */ x86emuOp_mov_word_register_IMM,
+
+/*  0xc0 */ x86emuOp_opcC0_byte_RM_MEM,
+/*  0xc1 */ x86emuOp_opcC1_word_RM_MEM,
+/*  0xc2 */ x86emuOp_ret_near_IMM,
+/*  0xc3 */ x86emuOp_ret_near,
+/*  0xc4 */ x86emuOp_les_R_IMM,
+/*  0xc5 */ x86emuOp_lds_R_IMM,
+/*  0xc6 */ x86emuOp_mov_byte_RM_IMM,
+/*  0xc7 */ x86emuOp_mov_word_RM_IMM,
+/*  0xc8 */ x86emuOp_enter,
+/*  0xc9 */ x86emuOp_leave,
+/*  0xca */ x86emuOp_ret_far_IMM,
+/*  0xcb */ x86emuOp_ret_far,
+/*  0xcc */ x86emuOp_int3,
+/*  0xcd */ x86emuOp_int_IMM,
+/*  0xce */ x86emuOp_into,
+/*  0xcf */ x86emuOp_iret,
+
+/*  0xd0 */ x86emuOp_opcD0_byte_RM_1,
+/*  0xd1 */ x86emuOp_opcD1_word_RM_1,
+/*  0xd2 */ x86emuOp_opcD2_byte_RM_CL,
+/*  0xd3 */ x86emuOp_opcD3_word_RM_CL,
+/*  0xd4 */ x86emuOp_aam,
+/*  0xd5 */ x86emuOp_aad,
+/*  0xd6 */ x86emuOp_illegal_op,   /* Undocumented SETALC instruction */
+/*  0xd7 */ x86emuOp_xlat,
+/*  0xd8 */ NULL, /*x86emuOp_esc_coprocess_d8,*/
+/*  0xd9 */ NULL, /*x86emuOp_esc_coprocess_d9,*/
+/*  0xda */ NULL, /*x86emuOp_esc_coprocess_da,*/
+/*  0xdb */ NULL, /*x86emuOp_esc_coprocess_db,*/
+/*  0xdc */ NULL, /*x86emuOp_esc_coprocess_dc,*/
+/*  0xdd */ NULL, /*x86emuOp_esc_coprocess_dd,*/
+/*  0xde */ NULL, /*x86emuOp_esc_coprocess_de,*/
+/*  0xdf */ NULL, /*x86emuOp_esc_coprocess_df,*/
+
+/*  0xe0 */ x86emuOp_loopne,
+/*  0xe1 */ x86emuOp_loope,
+/*  0xe2 */ x86emuOp_loop,
+/*  0xe3 */ x86emuOp_jcxz,
+/*  0xe4 */ x86emuOp_in_byte_AL_IMM,
+/*  0xe5 */ x86emuOp_in_word_AX_IMM,
+/*  0xe6 */ x86emuOp_out_byte_IMM_AL,
+/*  0xe7 */ x86emuOp_out_word_IMM_AX,
+
+/*  0xe8 */ x86emuOp_call_near_IMM,
+/*  0xe9 */ x86emuOp_jump_near_IMM,
+/*  0xea */ x86emuOp_jump_far_IMM,
+/*  0xeb */ x86emuOp_jump_byte_IMM,
+/*  0xec */ x86emuOp_in_byte_AL_DX,
+/*  0xed */ x86emuOp_in_word_AX_DX,
+/*  0xee */ x86emuOp_out_byte_DX_AL,
+/*  0xef */ x86emuOp_out_word_DX_AX,
+
+/*  0xf0 */ x86emuOp_lock,
+/*  0xf1 */ x86emuOp_illegal_op,
+/*  0xf2 */ x86emuOp_repne,
+/*  0xf3 */ x86emuOp_repe,
+/*  0xf4 */ x86emuOp_halt,
+/*  0xf5 */ x86emuOp_cmc,
+/*  0xf6 */ x86emuOp_opcF6_byte_RM,
+/*  0xf7 */ x86emuOp_opcF7_word_RM,
+
+/*  0xf8 */ x86emuOp_clc,
+/*  0xf9 */ x86emuOp_stc,
+/*  0xfa */ x86emuOp_cli,
+/*  0xfb */ x86emuOp_sti,
+/*  0xfc */ x86emuOp_cld,
+/*  0xfd */ x86emuOp_std,
+/*  0xfe */ x86emuOp_opcFE_byte_RM,
+/*  0xff */ x86emuOp_opcFF_word_RM,
+};
diff --git a/drivers/bios_emulator/x86emu/ops2.c b/drivers/bios_emulator/x86emu/ops2.c
new file mode 100644
index 0000000000..2412b24cd8
--- /dev/null
+++ b/drivers/bios_emulator/x86emu/ops2.c
@@ -0,0 +1,1770 @@
+/****************************************************************************
+*
+*                       Realmode X86 Emulator Library
+*
+*  Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
+*  Jason Jin <Jason.jin@freescale.com>
+*
+*               Copyright (C) 1991-2004 SciTech Software, Inc.
+*                    Copyright (C) David Mosberger-Tang
+*                      Copyright (C) 1999 Egbert Eich
+*
+*  ========================================================================
+*
+*  Permission to use, copy, modify, distribute, and sell this software and
+*  its documentation for any purpose is hereby granted without fee,
+*  provided that the above copyright notice appear in all copies and that
+*  both that copyright notice and this permission notice appear in
+*  supporting documentation, and that the name of the authors not be used
+*  in advertising or publicity pertaining to distribution of the software
+*  without specific, written prior permission.  The authors makes no
+*  representations about the suitability of this software for any purpose.
+*  It is provided "as is" without express or implied warranty.
+*
+*  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+*  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+*  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+*  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+*  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+*  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+*  PERFORMANCE OF THIS SOFTWARE.
+*
+*  ========================================================================
+*
+* Language:     ANSI C
+* Environment:  Any
+* Developer:    Kendall Bennett
+*
+* Description:  This file includes subroutines to implement the decoding
+*               and emulation of all the x86 extended two-byte processor
+*               instructions.
+*
+*               Jason port this file to u-boot. Put the function pointer into
+*               got2 sector.
+*
+****************************************************************************/
+
+#include "x86emu/x86emui.h"
+
+/*----------------------------- Implementation ----------------------------*/
+
+/****************************************************************************
+PARAMETERS:
+op1 - Instruction op code
+
+REMARKS:
+Handles illegal opcodes.
+****************************************************************************/
+void x86emuOp2_illegal_op(
+    u8 op2)
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n");
+    TRACE_REGS();
+    printk("%04x:%04x: %02X ILLEGAL EXTENDED X86 OPCODE!\n",
+        M.x86.R_CS, M.x86.R_IP-2,op2);
+    HALT_SYS();
+    END_OF_INSTR();
+}
+
+#define xorl(a,b)   ((a) && !(b)) || (!(a) && (b))
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0x80-0x8F
+****************************************************************************/
+int x86emu_check_jump_condition(u8 op)
+{
+    switch (op) {
+      case 0x0:
+        DECODE_PRINTF("JO\t");
+        return ACCESS_FLAG(F_OF);
+      case 0x1:
+        DECODE_PRINTF("JNO\t");
+        return !ACCESS_FLAG(F_OF);
+        break;
+      case 0x2:
+        DECODE_PRINTF("JB\t");
+        return ACCESS_FLAG(F_CF);
+        break;
+      case 0x3:
+        DECODE_PRINTF("JNB\t");
+        return !ACCESS_FLAG(F_CF);
+        break;
+      case 0x4:
+        DECODE_PRINTF("JZ\t");
+        return ACCESS_FLAG(F_ZF);
+        break;
+      case 0x5:
+        DECODE_PRINTF("JNZ\t");
+        return !ACCESS_FLAG(F_ZF);
+        break;
+      case 0x6:
+        DECODE_PRINTF("JBE\t");
+        return ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF);
+        break;
+      case 0x7:
+        DECODE_PRINTF("JNBE\t");
+        return !(ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF));
+        break;
+      case 0x8:
+        DECODE_PRINTF("JS\t");
+        return ACCESS_FLAG(F_SF);
+        break;
+      case 0x9:
+        DECODE_PRINTF("JNS\t");
+        return !ACCESS_FLAG(F_SF);
+        break;
+      case 0xa:
+        DECODE_PRINTF("JP\t");
+        return ACCESS_FLAG(F_PF);
+        break;
+      case 0xb:
+        DECODE_PRINTF("JNP\t");
+        return !ACCESS_FLAG(F_PF);
+        break;
+      case 0xc:
+        DECODE_PRINTF("JL\t");
+        return xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF));
+        break;
+      case 0xd:
+        DECODE_PRINTF("JNL\t");
+        return !xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF));
+        break;
+      case 0xe:
+        DECODE_PRINTF("JLE\t");
+        return (xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) ||
+                ACCESS_FLAG(F_ZF));
+        break;
+      default:
+        DECODE_PRINTF("JNLE\t");
+        return !(xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) ||
+                 ACCESS_FLAG(F_ZF));
+    }
+}
+
+void x86emuOp2_long_jump(u8 op2)
+{
+    s32 target;
+    int cond;
+
+    /* conditional jump to word offset. */
+    START_OF_INSTR();
+    cond = x86emu_check_jump_condition(op2 & 0xF);
+    target = (s16) fetch_word_imm();
+    target += (s16) M.x86.R_IP;
+    DECODE_PRINTF2("%04x\n", target);
+    TRACE_AND_STEP();
+    if (cond)
+        M.x86.R_IP = (u16)target;
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0x90-0x9F
+****************************************************************************/
+void x86emuOp2_set_byte(u8 op2)
+{
+    int mod, rl, rh;
+    uint destoffset;
+    u8  *destreg;
+    char *name = 0;
+    int cond = 0;
+
+    START_OF_INSTR();
+    switch (op2) {
+      case 0x90:
+        name = "SETO\t";
+        cond =  ACCESS_FLAG(F_OF);
+        break;
+      case 0x91:
+        name = "SETNO\t";
+        cond = !ACCESS_FLAG(F_OF);
+        break;
+      case 0x92:
+        name = "SETB\t";
+        cond = ACCESS_FLAG(F_CF);
+        break;
+      case 0x93:
+        name = "SETNB\t";
+        cond = !ACCESS_FLAG(F_CF);
+        break;
+      case 0x94:
+        name = "SETZ\t";
+        cond = ACCESS_FLAG(F_ZF);
+        break;
+      case 0x95:
+        name = "SETNZ\t";
+        cond = !ACCESS_FLAG(F_ZF);
+        break;
+      case 0x96:
+        name = "SETBE\t";
+        cond = ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF);
+        break;
+      case 0x97:
+        name = "SETNBE\t";
+        cond = !(ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF));
+        break;
+      case 0x98:
+        name = "SETS\t";
+        cond = ACCESS_FLAG(F_SF);
+        break;
+      case 0x99:
+        name = "SETNS\t";
+        cond = !ACCESS_FLAG(F_SF);
+        break;
+      case 0x9a:
+        name = "SETP\t";
+        cond = ACCESS_FLAG(F_PF);
+        break;
+      case 0x9b:
+        name = "SETNP\t";
+        cond = !ACCESS_FLAG(F_PF);
+        break;
+      case 0x9c:
+        name = "SETL\t";
+        cond = xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF));
+        break;
+      case 0x9d:
+        name = "SETNL\t";
+        cond = !xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF));
+        break;
+      case 0x9e:
+        name = "SETLE\t";
+        cond = (xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) ||
+                ACCESS_FLAG(F_ZF));
+        break;
+      case 0x9f:
+        name = "SETNLE\t";
+        cond = !(xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) ||
+                 ACCESS_FLAG(F_ZF));
+        break;
+    }
+    DECODE_PRINTF(name);
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        TRACE_AND_STEP();
+        store_data_byte(destoffset, cond ? 0x01 : 0x00);
+    } else {                     /* register to register */
+        destreg = DECODE_RM_BYTE_REGISTER(rl);
+        TRACE_AND_STEP();
+        *destreg = cond ? 0x01 : 0x00;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa0
+****************************************************************************/
+void x86emuOp2_push_FS(u8 X86EMU_UNUSED(op2))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("PUSH\tFS\n");
+    TRACE_AND_STEP();
+    push_word(M.x86.R_FS);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa1
+****************************************************************************/
+void x86emuOp2_pop_FS(u8 X86EMU_UNUSED(op2))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("POP\tFS\n");
+    TRACE_AND_STEP();
+    M.x86.R_FS = pop_word();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa3
+****************************************************************************/
+void x86emuOp2_bt_R(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+    int bit,disp;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("BT\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        srcoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 srcval;
+            u32 *shiftreg;
+
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0x1F;
+            disp = (s16)*shiftreg >> 5;
+            srcval = fetch_data_long(srcoffset+disp);
+            CONDITIONAL_SET_FLAG(srcval & (0x1 << bit),F_CF);
+        } else {
+            u16 srcval;
+            u16 *shiftreg;
+
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0xF;
+            disp = (s16)*shiftreg >> 4;
+            srcval = fetch_data_word(srcoffset+disp);
+            CONDITIONAL_SET_FLAG(srcval & (0x1 << bit),F_CF);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *srcreg,*shiftreg;
+
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0x1F;
+            CONDITIONAL_SET_FLAG(*srcreg & (0x1 << bit),F_CF);
+        } else {
+            u16 *srcreg,*shiftreg;
+
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0xF;
+            CONDITIONAL_SET_FLAG(*srcreg & (0x1 << bit),F_CF);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa4
+****************************************************************************/
+void x86emuOp2_shld_IMM(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint destoffset;
+    u8 shift;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("SHLD\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval;
+            u32 *shiftreg;
+
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            shift = fetch_byte_imm();
+            DECODE_PRINTF2("%d\n", shift);
+            TRACE_AND_STEP();
+            destval = fetch_data_long(destoffset);
+            destval = shld_long(destval,*shiftreg,shift);
+            store_data_long(destoffset, destval);
+        } else {
+            u16 destval;
+            u16 *shiftreg;
+
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            shift = fetch_byte_imm();
+            DECODE_PRINTF2("%d\n", shift);
+            TRACE_AND_STEP();
+            destval = fetch_data_word(destoffset);
+            destval = shld_word(destval,*shiftreg,shift);
+            store_data_word(destoffset, destval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*shiftreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            shift = fetch_byte_imm();
+            DECODE_PRINTF2("%d\n", shift);
+            TRACE_AND_STEP();
+            *destreg = shld_long(*destreg,*shiftreg,shift);
+        } else {
+            u16 *destreg,*shiftreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            shift = fetch_byte_imm();
+            DECODE_PRINTF2("%d\n", shift);
+            TRACE_AND_STEP();
+            *destreg = shld_word(*destreg,*shiftreg,shift);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa5
+****************************************************************************/
+void x86emuOp2_shld_CL(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("SHLD\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval;
+            u32 *shiftreg;
+
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",CL\n");
+            TRACE_AND_STEP();
+            destval = fetch_data_long(destoffset);
+            destval = shld_long(destval,*shiftreg,M.x86.R_CL);
+            store_data_long(destoffset, destval);
+        } else {
+            u16 destval;
+            u16 *shiftreg;
+
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",CL\n");
+            TRACE_AND_STEP();
+            destval = fetch_data_word(destoffset);
+            destval = shld_word(destval,*shiftreg,M.x86.R_CL);
+            store_data_word(destoffset, destval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*shiftreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",CL\n");
+            TRACE_AND_STEP();
+            *destreg = shld_long(*destreg,*shiftreg,M.x86.R_CL);
+        } else {
+            u16 *destreg,*shiftreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",CL\n");
+            TRACE_AND_STEP();
+            *destreg = shld_word(*destreg,*shiftreg,M.x86.R_CL);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa8
+****************************************************************************/
+void x86emuOp2_push_GS(u8 X86EMU_UNUSED(op2))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("PUSH\tGS\n");
+    TRACE_AND_STEP();
+    push_word(M.x86.R_GS);
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa9
+****************************************************************************/
+void x86emuOp2_pop_GS(u8 X86EMU_UNUSED(op2))
+{
+    START_OF_INSTR();
+    DECODE_PRINTF("POP\tGS\n");
+    TRACE_AND_STEP();
+    M.x86.R_GS = pop_word();
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xaa
+****************************************************************************/
+void x86emuOp2_bts_R(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+    int bit,disp;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("BTS\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        srcoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 srcval,mask;
+            u32 *shiftreg;
+
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0x1F;
+            disp = (s16)*shiftreg >> 5;
+            srcval = fetch_data_long(srcoffset+disp);
+            mask = (0x1 << bit);
+            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+            store_data_long(srcoffset+disp, srcval | mask);
+        } else {
+            u16 srcval,mask;
+            u16 *shiftreg;
+
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0xF;
+            disp = (s16)*shiftreg >> 4;
+            srcval = fetch_data_word(srcoffset+disp);
+            mask = (u16)(0x1 << bit);
+            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+            store_data_word(srcoffset+disp, srcval | mask);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *srcreg,*shiftreg;
+            u32 mask;
+
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0x1F;
+            mask = (0x1 << bit);
+            CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+            *srcreg |= mask;
+        } else {
+            u16 *srcreg,*shiftreg;
+            u16 mask;
+
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0xF;
+            mask = (u16)(0x1 << bit);
+            CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+            *srcreg |= mask;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xac
+****************************************************************************/
+void x86emuOp2_shrd_IMM(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint destoffset;
+    u8 shift;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("SHLD\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval;
+            u32 *shiftreg;
+
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            shift = fetch_byte_imm();
+            DECODE_PRINTF2("%d\n", shift);
+            TRACE_AND_STEP();
+            destval = fetch_data_long(destoffset);
+            destval = shrd_long(destval,*shiftreg,shift);
+            store_data_long(destoffset, destval);
+        } else {
+            u16 destval;
+            u16 *shiftreg;
+
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            shift = fetch_byte_imm();
+            DECODE_PRINTF2("%d\n", shift);
+            TRACE_AND_STEP();
+            destval = fetch_data_word(destoffset);
+            destval = shrd_word(destval,*shiftreg,shift);
+            store_data_word(destoffset, destval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*shiftreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            shift = fetch_byte_imm();
+            DECODE_PRINTF2("%d\n", shift);
+            TRACE_AND_STEP();
+            *destreg = shrd_long(*destreg,*shiftreg,shift);
+        } else {
+            u16 *destreg,*shiftreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            shift = fetch_byte_imm();
+            DECODE_PRINTF2("%d\n", shift);
+            TRACE_AND_STEP();
+            *destreg = shrd_word(*destreg,*shiftreg,shift);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xad
+****************************************************************************/
+void x86emuOp2_shrd_CL(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint destoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("SHLD\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 destval;
+            u32 *shiftreg;
+
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",CL\n");
+            TRACE_AND_STEP();
+            destval = fetch_data_long(destoffset);
+            destval = shrd_long(destval,*shiftreg,M.x86.R_CL);
+            store_data_long(destoffset, destval);
+        } else {
+            u16 destval;
+            u16 *shiftreg;
+
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",CL\n");
+            TRACE_AND_STEP();
+            destval = fetch_data_word(destoffset);
+            destval = shrd_word(destval,*shiftreg,M.x86.R_CL);
+            store_data_word(destoffset, destval);
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*shiftreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",CL\n");
+            TRACE_AND_STEP();
+            *destreg = shrd_long(*destreg,*shiftreg,M.x86.R_CL);
+        } else {
+            u16 *destreg,*shiftreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",CL\n");
+            TRACE_AND_STEP();
+            *destreg = shrd_word(*destreg,*shiftreg,M.x86.R_CL);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xaf
+****************************************************************************/
+void x86emuOp2_imul_R_RM(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("IMUL\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u32 srcval;
+            u32 res_lo,res_hi;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcoffset = decode_rmXX_address(mod, rl);
+            srcval = fetch_data_long(srcoffset);
+            TRACE_AND_STEP();
+            imul_long_direct(&res_lo,&res_hi,(s32)*destreg,(s32)srcval);
+            if (res_hi != 0) {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            } else {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            }
+            *destreg = (u32)res_lo;
+        } else {
+            u16 *destreg;
+            u16 srcval;
+            u32 res;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcoffset = decode_rmXX_address(mod, rl);
+            srcval = fetch_data_word(srcoffset);
+            TRACE_AND_STEP();
+            res = (s16)*destreg * (s16)srcval;
+            if (res > 0xFFFF) {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            } else {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            }
+            *destreg = (u16)res;
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg,*srcreg;
+            u32 res_lo,res_hi;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            TRACE_AND_STEP();
+            imul_long_direct(&res_lo,&res_hi,(s32)*destreg,(s32)*srcreg);
+            if (res_hi != 0) {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            } else {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            }
+            *destreg = (u32)res_lo;
+        } else {
+            u16 *destreg,*srcreg;
+            u32 res;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            res = (s16)*destreg * (s16)*srcreg;
+            if (res > 0xFFFF) {
+                SET_FLAG(F_CF);
+                SET_FLAG(F_OF);
+            } else {
+                CLEAR_FLAG(F_CF);
+                CLEAR_FLAG(F_OF);
+            }
+            *destreg = (u16)res;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb2
+****************************************************************************/
+void x86emuOp2_lss_R_IMM(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rh, rl;
+    u16 *dstreg;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("LSS\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        dstreg = DECODE_RM_WORD_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *dstreg = fetch_data_word(srcoffset);
+        M.x86.R_SS = fetch_data_word(srcoffset + 2);
+    } else {                     /* register to register */
+        /* UNDEFINED! */
+        TRACE_AND_STEP();
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb3
+****************************************************************************/
+void x86emuOp2_btr_R(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+    int bit,disp;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("BTR\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        srcoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 srcval,mask;
+            u32 *shiftreg;
+
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0x1F;
+            disp = (s16)*shiftreg >> 5;
+            srcval = fetch_data_long(srcoffset+disp);
+            mask = (0x1 << bit);
+            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+            store_data_long(srcoffset+disp, srcval & ~mask);
+        } else {
+            u16 srcval,mask;
+            u16 *shiftreg;
+
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0xF;
+            disp = (s16)*shiftreg >> 4;
+            srcval = fetch_data_word(srcoffset+disp);
+            mask = (u16)(0x1 << bit);
+            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+            store_data_word(srcoffset+disp, (u16)(srcval & ~mask));
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *srcreg,*shiftreg;
+            u32 mask;
+
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0x1F;
+            mask = (0x1 << bit);
+            CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+            *srcreg &= ~mask;
+        } else {
+            u16 *srcreg,*shiftreg;
+            u16 mask;
+
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0xF;
+            mask = (u16)(0x1 << bit);
+            CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+            *srcreg &= ~mask;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb4
+****************************************************************************/
+void x86emuOp2_lfs_R_IMM(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rh, rl;
+    u16 *dstreg;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("LFS\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        dstreg = DECODE_RM_WORD_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *dstreg = fetch_data_word(srcoffset);
+        M.x86.R_FS = fetch_data_word(srcoffset + 2);
+    } else {                     /* register to register */
+        /* UNDEFINED! */
+        TRACE_AND_STEP();
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb5
+****************************************************************************/
+void x86emuOp2_lgs_R_IMM(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rh, rl;
+    u16 *dstreg;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("LGS\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        dstreg = DECODE_RM_WORD_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *dstreg = fetch_data_word(srcoffset);
+        M.x86.R_GS = fetch_data_word(srcoffset + 2);
+    } else {                     /* register to register */
+        /* UNDEFINED! */
+        TRACE_AND_STEP();
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb6
+****************************************************************************/
+void x86emuOp2_movzx_byte_R_RM(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOVZX\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u32 srcval;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcoffset = decode_rmXX_address(mod, rl);
+            srcval = fetch_data_byte(srcoffset);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = srcval;
+        } else {
+            u16 *destreg;
+            u16 srcval;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcoffset = decode_rmXX_address(mod, rl);
+            srcval = fetch_data_byte(srcoffset);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = srcval;
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u8  *srcreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_BYTE_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = *srcreg;
+        } else {
+            u16 *destreg;
+            u8  *srcreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_BYTE_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = *srcreg;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb7
+****************************************************************************/
+void x86emuOp2_movzx_word_R_RM(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+    u32 *destreg;
+    u32 srcval;
+    u16 *srcreg;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOVZX\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destreg = DECODE_RM_LONG_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcoffset = decode_rmXX_address(mod, rl);
+        srcval = fetch_data_word(srcoffset);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = srcval;
+    } else {                     /* register to register */
+        destreg = DECODE_RM_LONG_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcreg = DECODE_RM_WORD_REGISTER(rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = *srcreg;
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xba
+****************************************************************************/
+void x86emuOp2_btX_I(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+    u8 shift;
+    int bit;
+
+    START_OF_INSTR();
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    switch (rh) {
+    case 4:
+        DECODE_PRINTF("BT\t");
+        break;
+    case 5:
+        DECODE_PRINTF("BTS\t");
+        break;
+    case 6:
+        DECODE_PRINTF("BTR\t");
+        break;
+    case 7:
+        DECODE_PRINTF("BTC\t");
+        break;
+    default:
+        DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n");
+        TRACE_REGS();
+        printk("%04x:%04x: %02X%02X ILLEGAL EXTENDED X86 OPCODE EXTENSION!\n",
+                M.x86.R_CS, M.x86.R_IP-3,op2, (mod<<6)|(rh<<3)|rl);
+        HALT_SYS();
+    }
+    if (mod < 3) {
+
+        srcoffset = decode_rmXX_address(mod, rl);
+        shift = fetch_byte_imm();
+        DECODE_PRINTF2(",%d\n", shift);
+        TRACE_AND_STEP();
+
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 srcval, mask;
+
+            bit = shift & 0x1F;
+            srcval = fetch_data_long(srcoffset);
+            mask = (0x1 << bit);
+            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+            switch (rh) {
+            case 5:
+                store_data_long(srcoffset, srcval | mask);
+                break;
+            case 6:
+                store_data_long(srcoffset, srcval & ~mask);
+                break;
+            case 7:
+                store_data_long(srcoffset, srcval ^ mask);
+                break;
+            default:
+                break;
+            }
+        } else {
+            u16 srcval, mask;
+
+            bit = shift & 0xF;
+            srcval = fetch_data_word(srcoffset);
+            mask = (0x1 << bit);
+            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+            switch (rh) {
+            case 5:
+                store_data_word(srcoffset, srcval | mask);
+                break;
+            case 6:
+                store_data_word(srcoffset, srcval & ~mask);
+                break;
+            case 7:
+                store_data_word(srcoffset, srcval ^ mask);
+                break;
+            default:
+                break;
+            }
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *srcreg;
+            u32 mask;
+
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            shift = fetch_byte_imm();
+            DECODE_PRINTF2(",%d\n", shift);
+            TRACE_AND_STEP();
+            bit = shift & 0x1F;
+            mask = (0x1 << bit);
+            CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+            switch (rh) {
+            case 5:
+                *srcreg |= mask;
+                break;
+            case 6:
+                *srcreg &= ~mask;
+                break;
+            case 7:
+                *srcreg ^= mask;
+                break;
+            default:
+                break;
+            }
+        } else {
+            u16 *srcreg;
+            u16 mask;
+
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            shift = fetch_byte_imm();
+            DECODE_PRINTF2(",%d\n", shift);
+            TRACE_AND_STEP();
+            bit = shift & 0xF;
+            mask = (0x1 << bit);
+            CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+            switch (rh) {
+            case 5:
+                *srcreg |= mask;
+                break;
+            case 6:
+                *srcreg &= ~mask;
+                break;
+            case 7:
+                *srcreg ^= mask;
+                break;
+            default:
+                break;
+            }
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xbb
+****************************************************************************/
+void x86emuOp2_btc_R(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+    int bit,disp;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("BTC\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        srcoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 srcval,mask;
+            u32 *shiftreg;
+
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0x1F;
+            disp = (s16)*shiftreg >> 5;
+            srcval = fetch_data_long(srcoffset+disp);
+            mask = (0x1 << bit);
+            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+            store_data_long(srcoffset+disp, srcval ^ mask);
+        } else {
+            u16 srcval,mask;
+            u16 *shiftreg;
+
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0xF;
+            disp = (s16)*shiftreg >> 4;
+            srcval = fetch_data_word(srcoffset+disp);
+            mask = (u16)(0x1 << bit);
+            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+            store_data_word(srcoffset+disp, (u16)(srcval ^ mask));
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *srcreg,*shiftreg;
+            u32 mask;
+
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0x1F;
+            mask = (0x1 << bit);
+            CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+            *srcreg ^= mask;
+        } else {
+            u16 *srcreg,*shiftreg;
+            u16 mask;
+
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            shiftreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            bit = *shiftreg & 0xF;
+            mask = (u16)(0x1 << bit);
+            CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+            *srcreg ^= mask;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xbc
+****************************************************************************/
+void x86emuOp2_bsf(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("BSF\n");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        srcoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 srcval, *dstreg;
+
+            dstreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            srcval = fetch_data_long(srcoffset);
+            CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
+            for(*dstreg = 0; *dstreg < 32; (*dstreg)++)
+                if ((srcval >> *dstreg) & 1) break;
+        } else {
+            u16 srcval, *dstreg;
+
+            dstreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            srcval = fetch_data_word(srcoffset);
+            CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
+            for(*dstreg = 0; *dstreg < 16; (*dstreg)++)
+                if ((srcval >> *dstreg) & 1) break;
+        }
+    } else {             /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *srcreg, *dstreg;
+
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            dstreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF);
+            for(*dstreg = 0; *dstreg < 32; (*dstreg)++)
+                if ((*srcreg >> *dstreg) & 1) break;
+        } else {
+            u16 *srcreg, *dstreg;
+
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            dstreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF);
+            for(*dstreg = 0; *dstreg < 16; (*dstreg)++)
+                if ((*srcreg >> *dstreg) & 1) break;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xbd
+****************************************************************************/
+void x86emuOp2_bsr(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("BSF\n");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        srcoffset = decode_rmXX_address(mod, rl);
+        DECODE_PRINTF(",");
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 srcval, *dstreg;
+
+            dstreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            srcval = fetch_data_long(srcoffset);
+            CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
+            for(*dstreg = 31; *dstreg > 0; (*dstreg)--)
+                if ((srcval >> *dstreg) & 1) break;
+        } else {
+            u16 srcval, *dstreg;
+
+            dstreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            srcval = fetch_data_word(srcoffset);
+            CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
+            for(*dstreg = 15; *dstreg > 0; (*dstreg)--)
+                if ((srcval >> *dstreg) & 1) break;
+        }
+    } else {             /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *srcreg, *dstreg;
+
+            srcreg = DECODE_RM_LONG_REGISTER(rl);
+            DECODE_PRINTF(",");
+            dstreg = DECODE_RM_LONG_REGISTER(rh);
+            TRACE_AND_STEP();
+            CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF);
+            for(*dstreg = 31; *dstreg > 0; (*dstreg)--)
+                if ((*srcreg >> *dstreg) & 1) break;
+        } else {
+            u16 *srcreg, *dstreg;
+
+            srcreg = DECODE_RM_WORD_REGISTER(rl);
+            DECODE_PRINTF(",");
+            dstreg = DECODE_RM_WORD_REGISTER(rh);
+            TRACE_AND_STEP();
+            CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF);
+            for(*dstreg = 15; *dstreg > 0; (*dstreg)--)
+                if ((*srcreg >> *dstreg) & 1) break;
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xbe
+****************************************************************************/
+void x86emuOp2_movsx_byte_R_RM(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOVSX\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u32 srcval;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcoffset = decode_rmXX_address(mod, rl);
+            srcval = (s32)((s8)fetch_data_byte(srcoffset));
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = srcval;
+        } else {
+            u16 *destreg;
+            u16 srcval;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcoffset = decode_rmXX_address(mod, rl);
+            srcval = (s16)((s8)fetch_data_byte(srcoffset));
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = srcval;
+        }
+    } else {                     /* register to register */
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            u32 *destreg;
+            u8  *srcreg;
+
+            destreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_BYTE_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = (s32)((s8)*srcreg);
+        } else {
+            u16 *destreg;
+            u8  *srcreg;
+
+            destreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            srcreg = DECODE_RM_BYTE_REGISTER(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *destreg = (s16)((s8)*srcreg);
+        }
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xbf
+****************************************************************************/
+void x86emuOp2_movsx_word_R_RM(u8 X86EMU_UNUSED(op2))
+{
+    int mod, rl, rh;
+    uint srcoffset;
+    u32 *destreg;
+    u32 srcval;
+    u16 *srcreg;
+
+    START_OF_INSTR();
+    DECODE_PRINTF("MOVSX\t");
+    FETCH_DECODE_MODRM(mod, rh, rl);
+    if (mod < 3) {
+        destreg = DECODE_RM_LONG_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcoffset = decode_rmXX_address(mod, rl);
+        srcval = (s32)((s16)fetch_data_word(srcoffset));
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = srcval;
+    } else {                     /* register to register */
+        destreg = DECODE_RM_LONG_REGISTER(rh);
+        DECODE_PRINTF(",");
+        srcreg = DECODE_RM_WORD_REGISTER(rl);
+        DECODE_PRINTF("\n");
+        TRACE_AND_STEP();
+        *destreg = (s32)((s16)*srcreg);
+    }
+    DECODE_CLEAR_SEGOVR();
+    END_OF_INSTR();
+}
+
+/***************************************************************************
+ * Double byte operation code table:
+ **************************************************************************/
+void (*x86emu_optab2[256])(u8) __attribute__((section(".got2"))) =
+{
+/*  0x00 */ x86emuOp2_illegal_op,  /* Group F (ring 0 PM)      */
+/*  0x01 */ x86emuOp2_illegal_op,  /* Group G (ring 0 PM)      */
+/*  0x02 */ x86emuOp2_illegal_op,  /* lar (ring 0 PM)          */
+/*  0x03 */ x86emuOp2_illegal_op,  /* lsl (ring 0 PM)          */
+/*  0x04 */ x86emuOp2_illegal_op,
+/*  0x05 */ x86emuOp2_illegal_op,  /* loadall (undocumented)   */
+/*  0x06 */ x86emuOp2_illegal_op,  /* clts (ring 0 PM)         */
+/*  0x07 */ x86emuOp2_illegal_op,  /* loadall (undocumented)   */
+/*  0x08 */ x86emuOp2_illegal_op,  /* invd (ring 0 PM)         */
+/*  0x09 */ x86emuOp2_illegal_op,  /* wbinvd (ring 0 PM)       */
+/*  0x0a */ x86emuOp2_illegal_op,
+/*  0x0b */ x86emuOp2_illegal_op,
+/*  0x0c */ x86emuOp2_illegal_op,
+/*  0x0d */ x86emuOp2_illegal_op,
+/*  0x0e */ x86emuOp2_illegal_op,
+/*  0x0f */ x86emuOp2_illegal_op,
+
+/*  0x10 */ x86emuOp2_illegal_op,
+/*  0x11 */ x86emuOp2_illegal_op,
+/*  0x12 */ x86emuOp2_illegal_op,
+/*  0x13 */ x86emuOp2_illegal_op,
+/*  0x14 */ x86emuOp2_illegal_op,
+/*  0x15 */ x86emuOp2_illegal_op,
+/*  0x16 */ x86emuOp2_illegal_op,
+/*  0x17 */ x86emuOp2_illegal_op,
+/*  0x18 */ x86emuOp2_illegal_op,
+/*  0x19 */ x86emuOp2_illegal_op,
+/*  0x1a */ x86emuOp2_illegal_op,
+/*  0x1b */ x86emuOp2_illegal_op,
+/*  0x1c */ x86emuOp2_illegal_op,
+/*  0x1d */ x86emuOp2_illegal_op,
+/*  0x1e */ x86emuOp2_illegal_op,
+/*  0x1f */ x86emuOp2_illegal_op,
+
+/*  0x20 */ x86emuOp2_illegal_op,  /* mov reg32,creg (ring 0 PM) */
+/*  0x21 */ x86emuOp2_illegal_op,  /* mov reg32,dreg (ring 0 PM) */
+/*  0x22 */ x86emuOp2_illegal_op,  /* mov creg,reg32 (ring 0 PM) */
+/*  0x23 */ x86emuOp2_illegal_op,  /* mov dreg,reg32 (ring 0 PM) */
+/*  0x24 */ x86emuOp2_illegal_op,  /* mov reg32,treg (ring 0 PM) */
+/*  0x25 */ x86emuOp2_illegal_op,
+/*  0x26 */ x86emuOp2_illegal_op,  /* mov treg,reg32 (ring 0 PM) */
+/*  0x27 */ x86emuOp2_illegal_op,
+/*  0x28 */ x86emuOp2_illegal_op,
+/*  0x29 */ x86emuOp2_illegal_op,
+/*  0x2a */ x86emuOp2_illegal_op,
+/*  0x2b */ x86emuOp2_illegal_op,
+/*  0x2c */ x86emuOp2_illegal_op,
+/*  0x2d */ x86emuOp2_illegal_op,
+/*  0x2e */ x86emuOp2_illegal_op,
+/*  0x2f */ x86emuOp2_illegal_op,
+
+/*  0x30 */ x86emuOp2_illegal_op,
+/*  0x31 */ x86emuOp2_illegal_op,
+/*  0x32 */ x86emuOp2_illegal_op,
+/*  0x33 */ x86emuOp2_illegal_op,
+/*  0x34 */ x86emuOp2_illegal_op,
+/*  0x35 */ x86emuOp2_illegal_op,
+/*  0x36 */ x86emuOp2_illegal_op,
+/*  0x37 */ x86emuOp2_illegal_op,
+/*  0x38 */ x86emuOp2_illegal_op,
+/*  0x39 */ x86emuOp2_illegal_op,
+/*  0x3a */ x86emuOp2_illegal_op,
+/*  0x3b */ x86emuOp2_illegal_op,
+/*  0x3c */ x86emuOp2_illegal_op,
+/*  0x3d */ x86emuOp2_illegal_op,
+/*  0x3e */ x86emuOp2_illegal_op,
+/*  0x3f */ x86emuOp2_illegal_op,
+
+/*  0x40 */ x86emuOp2_illegal_op,
+/*  0x41 */ x86emuOp2_illegal_op,
+/*  0x42 */ x86emuOp2_illegal_op,
+/*  0x43 */ x86emuOp2_illegal_op,
+/*  0x44 */ x86emuOp2_illegal_op,
+/*  0x45 */ x86emuOp2_illegal_op,
+/*  0x46 */ x86emuOp2_illegal_op,
+/*  0x47 */ x86emuOp2_illegal_op,
+/*  0x48 */ x86emuOp2_illegal_op,
+/*  0x49 */ x86emuOp2_illegal_op,
+/*  0x4a */ x86emuOp2_illegal_op,
+/*  0x4b */ x86emuOp2_illegal_op,
+/*  0x4c */ x86emuOp2_illegal_op,
+/*  0x4d */ x86emuOp2_illegal_op,
+/*  0x4e */ x86emuOp2_illegal_op,
+/*  0x4f */ x86emuOp2_illegal_op,
+
+/*  0x50 */ x86emuOp2_illegal_op,
+/*  0x51 */ x86emuOp2_illegal_op,
+/*  0x52 */ x86emuOp2_illegal_op,
+/*  0x53 */ x86emuOp2_illegal_op,
+/*  0x54 */ x86emuOp2_illegal_op,
+/*  0x55 */ x86emuOp2_illegal_op,
+/*  0x56 */ x86emuOp2_illegal_op,
+/*  0x57 */ x86emuOp2_illegal_op,
+/*  0x58 */ x86emuOp2_illegal_op,
+/*  0x59 */ x86emuOp2_illegal_op,
+/*  0x5a */ x86emuOp2_illegal_op,
+/*  0x5b */ x86emuOp2_illegal_op,
+/*  0x5c */ x86emuOp2_illegal_op,
+/*  0x5d */ x86emuOp2_illegal_op,
+/*  0x5e */ x86emuOp2_illegal_op,
+/*  0x5f */ x86emuOp2_illegal_op,
+
+/*  0x60 */ x86emuOp2_illegal_op,
+/*  0x61 */ x86emuOp2_illegal_op,
+/*  0x62 */ x86emuOp2_illegal_op,
+/*  0x63 */ x86emuOp2_illegal_op,
+/*  0x64 */ x86emuOp2_illegal_op,
+/*  0x65 */ x86emuOp2_illegal_op,
+/*  0x66 */ x86emuOp2_illegal_op,
+/*  0x67 */ x86emuOp2_illegal_op,
+/*  0x68 */ x86emuOp2_illegal_op,
+/*  0x69 */ x86emuOp2_illegal_op,
+/*  0x6a */ x86emuOp2_illegal_op,
+/*  0x6b */ x86emuOp2_illegal_op,
+/*  0x6c */ x86emuOp2_illegal_op,
+/*  0x6d */ x86emuOp2_illegal_op,
+/*  0x6e */ x86emuOp2_illegal_op,
+/*  0x6f */ x86emuOp2_illegal_op,
+
+/*  0x70 */ x86emuOp2_illegal_op,
+/*  0x71 */ x86emuOp2_illegal_op,
+/*  0x72 */ x86emuOp2_illegal_op,
+/*  0x73 */ x86emuOp2_illegal_op,
+/*  0x74 */ x86emuOp2_illegal_op,
+/*  0x75 */ x86emuOp2_illegal_op,
+/*  0x76 */ x86emuOp2_illegal_op,
+/*  0x77 */ x86emuOp2_illegal_op,
+/*  0x78 */ x86emuOp2_illegal_op,
+/*  0x79 */ x86emuOp2_illegal_op,
+/*  0x7a */ x86emuOp2_illegal_op,
+/*  0x7b */ x86emuOp2_illegal_op,
+/*  0x7c */ x86emuOp2_illegal_op,
+/*  0x7d */ x86emuOp2_illegal_op,
+/*  0x7e */ x86emuOp2_illegal_op,
+/*  0x7f */ x86emuOp2_illegal_op,
+
+/*  0x80 */ x86emuOp2_long_jump,
+/*  0x81 */ x86emuOp2_long_jump,
+/*  0x82 */ x86emuOp2_long_jump,
+/*  0x83 */ x86emuOp2_long_jump,
+/*  0x84 */ x86emuOp2_long_jump,
+/*  0x85 */ x86emuOp2_long_jump,
+/*  0x86 */ x86emuOp2_long_jump,
+/*  0x87 */ x86emuOp2_long_jump,
+/*  0x88 */ x86emuOp2_long_jump,
+/*  0x89 */ x86emuOp2_long_jump,
+/*  0x8a */ x86emuOp2_long_jump,
+/*  0x8b */ x86emuOp2_long_jump,
+/*  0x8c */ x86emuOp2_long_jump,
+/*  0x8d */ x86emuOp2_long_jump,
+/*  0x8e */ x86emuOp2_long_jump,
+/*  0x8f */ x86emuOp2_long_jump,
+
+/*  0x90 */ x86emuOp2_set_byte,
+/*  0x91 */ x86emuOp2_set_byte,
+/*  0x92 */ x86emuOp2_set_byte,
+/*  0x93 */ x86emuOp2_set_byte,
+/*  0x94 */ x86emuOp2_set_byte,
+/*  0x95 */ x86emuOp2_set_byte,
+/*  0x96 */ x86emuOp2_set_byte,
+/*  0x97 */ x86emuOp2_set_byte,
+/*  0x98 */ x86emuOp2_set_byte,
+/*  0x99 */ x86emuOp2_set_byte,
+/*  0x9a */ x86emuOp2_set_byte,
+/*  0x9b */ x86emuOp2_set_byte,
+/*  0x9c */ x86emuOp2_set_byte,
+/*  0x9d */ x86emuOp2_set_byte,
+/*  0x9e */ x86emuOp2_set_byte,
+/*  0x9f */ x86emuOp2_set_byte,
+
+/*  0xa0 */ x86emuOp2_push_FS,
+/*  0xa1 */ x86emuOp2_pop_FS,
+/*  0xa2 */ x86emuOp2_illegal_op,
+/*  0xa3 */ x86emuOp2_bt_R,
+/*  0xa4 */ x86emuOp2_shld_IMM,
+/*  0xa5 */ x86emuOp2_shld_CL,
+/*  0xa6 */ x86emuOp2_illegal_op,
+/*  0xa7 */ x86emuOp2_illegal_op,
+/*  0xa8 */ x86emuOp2_push_GS,
+/*  0xa9 */ x86emuOp2_pop_GS,
+/*  0xaa */ x86emuOp2_illegal_op,
+/*  0xab */ x86emuOp2_bt_R,
+/*  0xac */ x86emuOp2_shrd_IMM,
+/*  0xad */ x86emuOp2_shrd_CL,
+/*  0xae */ x86emuOp2_illegal_op,
+/*  0xaf */ x86emuOp2_imul_R_RM,
+
+/*  0xb0 */ x86emuOp2_illegal_op,  /* TODO: cmpxchg */
+/*  0xb1 */ x86emuOp2_illegal_op,  /* TODO: cmpxchg */
+/*  0xb2 */ x86emuOp2_lss_R_IMM,
+/*  0xb3 */ x86emuOp2_btr_R,
+/*  0xb4 */ x86emuOp2_lfs_R_IMM,
+/*  0xb5 */ x86emuOp2_lgs_R_IMM,
+/*  0xb6 */ x86emuOp2_movzx_byte_R_RM,
+/*  0xb7 */ x86emuOp2_movzx_word_R_RM,
+/*  0xb8 */ x86emuOp2_illegal_op,
+/*  0xb9 */ x86emuOp2_illegal_op,
+/*  0xba */ x86emuOp2_btX_I,
+/*  0xbb */ x86emuOp2_btc_R,
+/*  0xbc */ x86emuOp2_bsf,
+/*  0xbd */ x86emuOp2_bsr,
+/*  0xbe */ x86emuOp2_movsx_byte_R_RM,
+/*  0xbf */ x86emuOp2_movsx_word_R_RM,
+
+/*  0xc0 */ x86emuOp2_illegal_op,  /* TODO: xadd */
+/*  0xc1 */ x86emuOp2_illegal_op,  /* TODO: xadd */
+/*  0xc2 */ x86emuOp2_illegal_op,
+/*  0xc3 */ x86emuOp2_illegal_op,
+/*  0xc4 */ x86emuOp2_illegal_op,
+/*  0xc5 */ x86emuOp2_illegal_op,
+/*  0xc6 */ x86emuOp2_illegal_op,
+/*  0xc7 */ x86emuOp2_illegal_op,
+/*  0xc8 */ x86emuOp2_illegal_op,  /* TODO: bswap */
+/*  0xc9 */ x86emuOp2_illegal_op,  /* TODO: bswap */
+/*  0xca */ x86emuOp2_illegal_op,  /* TODO: bswap */
+/*  0xcb */ x86emuOp2_illegal_op,  /* TODO: bswap */
+/*  0xcc */ x86emuOp2_illegal_op,  /* TODO: bswap */
+/*  0xcd */ x86emuOp2_illegal_op,  /* TODO: bswap */
+/*  0xce */ x86emuOp2_illegal_op,  /* TODO: bswap */
+/*  0xcf */ x86emuOp2_illegal_op,  /* TODO: bswap */
+
+/*  0xd0 */ x86emuOp2_illegal_op,
+/*  0xd1 */ x86emuOp2_illegal_op,
+/*  0xd2 */ x86emuOp2_illegal_op,
+/*  0xd3 */ x86emuOp2_illegal_op,
+/*  0xd4 */ x86emuOp2_illegal_op,
+/*  0xd5 */ x86emuOp2_illegal_op,
+/*  0xd6 */ x86emuOp2_illegal_op,
+/*  0xd7 */ x86emuOp2_illegal_op,
+/*  0xd8 */ x86emuOp2_illegal_op,
+/*  0xd9 */ x86emuOp2_illegal_op,
+/*  0xda */ x86emuOp2_illegal_op,
+/*  0xdb */ x86emuOp2_illegal_op,
+/*  0xdc */ x86emuOp2_illegal_op,
+/*  0xdd */ x86emuOp2_illegal_op,
+/*  0xde */ x86emuOp2_illegal_op,
+/*  0xdf */ x86emuOp2_illegal_op,
+
+/*  0xe0 */ x86emuOp2_illegal_op,
+/*  0xe1 */ x86emuOp2_illegal_op,
+/*  0xe2 */ x86emuOp2_illegal_op,
+/*  0xe3 */ x86emuOp2_illegal_op,
+/*  0xe4 */ x86emuOp2_illegal_op,
+/*  0xe5 */ x86emuOp2_illegal_op,
+/*  0xe6 */ x86emuOp2_illegal_op,
+/*  0xe7 */ x86emuOp2_illegal_op,
+/*  0xe8 */ x86emuOp2_illegal_op,
+/*  0xe9 */ x86emuOp2_illegal_op,
+/*  0xea */ x86emuOp2_illegal_op,
+/*  0xeb */ x86emuOp2_illegal_op,
+/*  0xec */ x86emuOp2_illegal_op,
+/*  0xed */ x86emuOp2_illegal_op,
+/*  0xee */ x86emuOp2_illegal_op,
+/*  0xef */ x86emuOp2_illegal_op,
+
+/*  0xf0 */ x86emuOp2_illegal_op,
+/*  0xf1 */ x86emuOp2_illegal_op,
+/*  0xf2 */ x86emuOp2_illegal_op,
+/*  0xf3 */ x86emuOp2_illegal_op,
+/*  0xf4 */ x86emuOp2_illegal_op,
+/*  0xf5 */ x86emuOp2_illegal_op,
+/*  0xf6 */ x86emuOp2_illegal_op,
+/*  0xf7 */ x86emuOp2_illegal_op,
+/*  0xf8 */ x86emuOp2_illegal_op,
+/*  0xf9 */ x86emuOp2_illegal_op,
+/*  0xfa */ x86emuOp2_illegal_op,
+/*  0xfb */ x86emuOp2_illegal_op,
+/*  0xfc */ x86emuOp2_illegal_op,
+/*  0xfd */ x86emuOp2_illegal_op,
+/*  0xfe */ x86emuOp2_illegal_op,
+/*  0xff */ x86emuOp2_illegal_op,
+};
diff --git a/drivers/bios_emulator/x86emu/prim_ops.c b/drivers/bios_emulator/x86emu/prim_ops.c
new file mode 100644
index 0000000000..dc8cea8003
--- /dev/null
+++ b/drivers/bios_emulator/x86emu/prim_ops.c
@@ -0,0 +1,2446 @@
+/****************************************************************************
+*
+*                       Realmode X86 Emulator Library
+*
+*               Copyright (C) 1991-2004 SciTech Software, Inc.
+*                    Copyright (C) David Mosberger-Tang
+*                      Copyright (C) 1999 Egbert Eich
+*
+*  ========================================================================
+*
+*  Permission to use, copy, modify, distribute, and sell this software and
+*  its documentation for any purpose is hereby granted without fee,
+*  provided that the above copyright notice appear in all copies and that
+*  both that copyright notice and this permission notice appear in
+*  supporting documentation, and that the name of the authors not be used
+*  in advertising or publicity pertaining to distribution of the software
+*  without specific, written prior permission.  The authors makes no
+*  representations about the suitability of this software for any purpose.
+*  It is provided "as is" without express or implied warranty.
+*
+*  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+*  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+*  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+*  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+*  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+*  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+*  PERFORMANCE OF THIS SOFTWARE.
+*
+*  ========================================================================
+*
+* Language:     ANSI C
+* Environment:  Any
+* Developer:    Kendall Bennett
+*
+* Description:  This file contains the code to implement the primitive
+*               machine operations used by the emulation code in ops.c
+*
+* Carry Chain Calculation
+*
+* This represents a somewhat expensive calculation which is
+* apparently required to emulate the setting of the OF343364 and AF flag.
+* The latter is not so important, but the former is.  The overflow
+* flag is the XOR of the top two bits of the carry chain for an
+* addition (similar for subtraction).  Since we do not want to
+* simulate the addition in a bitwise manner, we try to calculate the
+* carry chain given the two operands and the result.
+*
+* So, given the following table, which represents the addition of two
+* bits, we can derive a formula for the carry chain.
+*
+* a   b   cin   r     cout
+* 0   0   0     0     0
+* 0   0   1     1     0
+* 0   1   0     1     0
+* 0   1   1     0     1
+* 1   0   0     1     0
+* 1   0   1     0     1
+* 1   1   0     0     1
+* 1   1   1     1     1
+*
+* Construction of table for cout:
+*
+* ab
+* r  \  00   01   11  10
+* |------------------
+* 0  |   0    1    1   1
+* 1  |   0    0    1   0
+*
+* By inspection, one gets:  cc = ab +  r'(a + b)
+*
+* That represents alot of operations, but NO CHOICE....
+*
+* Borrow Chain Calculation.
+*
+* The following table represents the subtraction of two bits, from
+* which we can derive a formula for the borrow chain.
+*
+* a   b   bin   r     bout
+* 0   0   0     0     0
+* 0   0   1     1     1
+* 0   1   0     1     1
+* 0   1   1     0     1
+* 1   0   0     1     0
+* 1   0   1     0     0
+* 1   1   0     0     0
+* 1   1   1     1     1
+*
+* Construction of table for cout:
+*
+* ab
+* r  \  00   01   11  10
+* |------------------
+* 0  |   0    1    0   0
+* 1  |   1    1    1   0
+*
+* By inspection, one gets:  bc = a'b +  r(a' + b)
+*
+****************************************************************************/
+
+#define PRIM_OPS_NO_REDEFINE_ASM
+#include "x86emu/x86emui.h"
+
+/*------------------------- Global Variables ------------------------------*/
+
+static u32 x86emu_parity_tab[8] =
+{
+    0x96696996,
+    0x69969669,
+    0x69969669,
+    0x96696996,
+    0x69969669,
+    0x96696996,
+    0x96696996,
+    0x69969669,
+};
+
+#define PARITY(x)   (((x86emu_parity_tab[(x) / 32] >> ((x) % 32)) & 1) == 0)
+#define XOR2(x)     (((x) ^ ((x)>>1)) & 0x1)
+/*----------------------------- Implementation ----------------------------*/
+int abs(int v)
+{
+	return (v>0)?v:-v;
+}
+
+/*----------------------------- Implementation ----------------------------*/
+
+
+/*--------- Side effects helper functions -------*/
+
+/****************************************************************************
+REMARKS:
+implements side efects for byte operations that don't overflow
+****************************************************************************/
+
+static void set_parity_flag(u32 res)
+{
+    CONDITIONAL_SET_FLAG(PARITY(res & 0xFF), F_PF);
+}
+
+static void set_szp_flags_8(u8 res)
+{
+    CONDITIONAL_SET_FLAG(res & 0x80, F_SF);
+    CONDITIONAL_SET_FLAG(res == 0, F_ZF);
+    set_parity_flag(res);
+}
+
+static void set_szp_flags_16(u16 res)
+{
+    CONDITIONAL_SET_FLAG(res & 0x8000, F_SF);
+    CONDITIONAL_SET_FLAG(res == 0, F_ZF);
+    set_parity_flag(res);
+}
+
+static void set_szp_flags_32(u32 res)
+{
+    CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF);
+    CONDITIONAL_SET_FLAG(res == 0, F_ZF);
+    set_parity_flag(res);
+}
+
+static void no_carry_byte_side_eff(u8 res)
+{
+    CLEAR_FLAG(F_OF);
+    CLEAR_FLAG(F_CF);
+    CLEAR_FLAG(F_AF);
+    set_szp_flags_8(res);
+}
+
+static void no_carry_word_side_eff(u16 res)
+{
+    CLEAR_FLAG(F_OF);
+    CLEAR_FLAG(F_CF);
+    CLEAR_FLAG(F_AF);
+    set_szp_flags_16(res);
+}
+
+static void no_carry_long_side_eff(u32 res)
+{
+    CLEAR_FLAG(F_OF);
+    CLEAR_FLAG(F_CF);
+    CLEAR_FLAG(F_AF);
+    set_szp_flags_32(res);
+}
+
+static void calc_carry_chain(int bits, u32 d, u32 s, u32 res, int set_carry)
+{
+    u32 cc;
+
+    cc = (s & d) | ((~res) & (s | d));
+    CONDITIONAL_SET_FLAG(XOR2(cc >> (bits - 2)), F_OF);
+    CONDITIONAL_SET_FLAG(cc & 0x8, F_AF);
+    if (set_carry) {
+        CONDITIONAL_SET_FLAG(res & (1 << bits), F_CF);
+    }
+}
+
+static void calc_borrow_chain(int bits, u32 d, u32 s, u32 res, int set_carry)
+{
+    u32 bc;
+
+    bc = (res & (~d | s)) | (~d & s);
+    CONDITIONAL_SET_FLAG(XOR2(bc >> (bits - 2)), F_OF);
+    CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+    if (set_carry) {
+        CONDITIONAL_SET_FLAG(bc & (1 << (bits - 1)), F_CF);
+    }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AAA instruction and side effects.
+****************************************************************************/
+u16 aaa_word(u16 d)
+{
+    u16 res;
+    if ((d & 0xf) > 0x9 || ACCESS_FLAG(F_AF)) {
+        d += 0x6;
+        d += 0x100;
+        SET_FLAG(F_AF);
+        SET_FLAG(F_CF);
+    } else {
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_AF);
+    }
+    res = (u16)(d & 0xFF0F);
+    set_szp_flags_16(res);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AAA instruction and side effects.
+****************************************************************************/
+u16 aas_word(u16 d)
+{
+    u16 res;
+    if ((d & 0xf) > 0x9 || ACCESS_FLAG(F_AF)) {
+        d -= 0x6;
+        d -= 0x100;
+        SET_FLAG(F_AF);
+        SET_FLAG(F_CF);
+    } else {
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_AF);
+    }
+    res = (u16)(d & 0xFF0F);
+    set_szp_flags_16(res);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AAD instruction and side effects.
+****************************************************************************/
+u16 aad_word(u16 d)
+{
+    u16 l;
+    u8 hb, lb;
+
+    hb = (u8)((d >> 8) & 0xff);
+    lb = (u8)((d & 0xff));
+    l = (u16)((lb + 10 * hb) & 0xFF);
+
+    no_carry_byte_side_eff(l & 0xFF);
+    return l;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AAM instruction and side effects.
+****************************************************************************/
+u16 aam_word(u8 d)
+{
+    u16 h, l;
+
+    h = (u16)(d / 10);
+    l = (u16)(d % 10);
+    l |= (u16)(h << 8);
+
+    no_carry_byte_side_eff(l & 0xFF);
+    return l;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADC instruction and side effects.
+****************************************************************************/
+u8 adc_byte(u8 d, u8 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d + s;
+    if (ACCESS_FLAG(F_CF)) res++;
+
+    set_szp_flags_8(res);
+    calc_carry_chain(8,s,d,res,1);
+
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADC instruction and side effects.
+****************************************************************************/
+u16 adc_word(u16 d, u16 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d + s;
+    if (ACCESS_FLAG(F_CF))
+        res++;
+
+    set_szp_flags_16((u16)res);
+    calc_carry_chain(16,s,d,res,1);
+
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADC instruction and side effects.
+****************************************************************************/
+u32 adc_long(u32 d, u32 s)
+{
+    u32 lo;    /* all operands in native machine order */
+    u32 hi;
+    u32 res;
+
+    lo = (d & 0xFFFF) + (s & 0xFFFF);
+    res = d + s;
+
+    if (ACCESS_FLAG(F_CF)) {
+        lo++;
+        res++;
+    }
+
+    hi = (lo >> 16) + (d >> 16) + (s >> 16);
+
+    set_szp_flags_32(res);
+    calc_carry_chain(32,s,d,res,0);
+
+    CONDITIONAL_SET_FLAG(hi & 0x10000, F_CF);
+
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADD instruction and side effects.
+****************************************************************************/
+u8 add_byte(u8 d, u8 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d + s;
+    set_szp_flags_8((u8)res);
+    calc_carry_chain(8,s,d,res,1);
+
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADD instruction and side effects.
+****************************************************************************/
+u16 add_word(u16 d, u16 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d + s;
+    set_szp_flags_16((u16)res);
+    calc_carry_chain(16,s,d,res,1);
+
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADD instruction and side effects.
+****************************************************************************/
+u32 add_long(u32 d, u32 s)
+{
+    u32 res;
+
+    res = d + s;
+    set_szp_flags_32(res);
+    calc_carry_chain(32,s,d,res,0);
+
+    CONDITIONAL_SET_FLAG(res < d || res < s, F_CF);
+
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AND instruction and side effects.
+****************************************************************************/
+u8 and_byte(u8 d, u8 s)
+{
+    u8 res;    /* all operands in native machine order */
+
+    res = d & s;
+
+    no_carry_byte_side_eff(res);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AND instruction and side effects.
+****************************************************************************/
+u16 and_word(u16 d, u16 s)
+{
+    u16 res;   /* all operands in native machine order */
+
+    res = d & s;
+
+    no_carry_word_side_eff(res);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AND instruction and side effects.
+****************************************************************************/
+u32 and_long(u32 d, u32 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d & s;
+    no_carry_long_side_eff(res);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the CMP instruction and side effects.
+****************************************************************************/
+u8 cmp_byte(u8 d, u8 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d - s;
+    set_szp_flags_8((u8)res);
+    calc_borrow_chain(8, d, s, res, 1);
+
+    return d;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the CMP instruction and side effects.
+****************************************************************************/
+u16 cmp_word(u16 d, u16 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d - s;
+    set_szp_flags_16((u16)res);
+    calc_borrow_chain(16, d, s, res, 1);
+
+    return d;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the CMP instruction and side effects.
+****************************************************************************/
+u32 cmp_long(u32 d, u32 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d - s;
+    set_szp_flags_32(res);
+    calc_borrow_chain(32, d, s, res, 1);
+
+    return d;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DAA instruction and side effects.
+****************************************************************************/
+u8 daa_byte(u8 d)
+{
+    u32 res = d;
+    if ((d & 0xf) > 9 || ACCESS_FLAG(F_AF)) {
+        res += 6;
+        SET_FLAG(F_AF);
+    }
+    if (res > 0x9F || ACCESS_FLAG(F_CF)) {
+        res += 0x60;
+        SET_FLAG(F_CF);
+    }
+    set_szp_flags_8((u8)res);
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DAS instruction and side effects.
+****************************************************************************/
+u8 das_byte(u8 d)
+{
+    if ((d & 0xf) > 9 || ACCESS_FLAG(F_AF)) {
+        d -= 6;
+        SET_FLAG(F_AF);
+    }
+    if (d > 0x9F || ACCESS_FLAG(F_CF)) {
+        d -= 0x60;
+        SET_FLAG(F_CF);
+    }
+    set_szp_flags_8(d);
+    return d;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DEC instruction and side effects.
+****************************************************************************/
+u8 dec_byte(u8 d)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d - 1;
+    set_szp_flags_8((u8)res);
+    calc_borrow_chain(8, d, 1, res, 0);
+
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DEC instruction and side effects.
+****************************************************************************/
+u16 dec_word(u16 d)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d - 1;
+    set_szp_flags_16((u16)res);
+    calc_borrow_chain(16, d, 1, res, 0);
+
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DEC instruction and side effects.
+****************************************************************************/
+u32 dec_long(u32 d)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d - 1;
+
+    set_szp_flags_32(res);
+    calc_borrow_chain(32, d, 1, res, 0);
+
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the INC instruction and side effects.
+****************************************************************************/
+u8 inc_byte(u8 d)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d + 1;
+    set_szp_flags_8((u8)res);
+    calc_carry_chain(8, d, 1, res, 0);
+
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the INC instruction and side effects.
+****************************************************************************/
+u16 inc_word(u16 d)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d + 1;
+    set_szp_flags_16((u16)res);
+    calc_carry_chain(16, d, 1, res, 0);
+
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the INC instruction and side effects.
+****************************************************************************/
+u32 inc_long(u32 d)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d + 1;
+    set_szp_flags_32(res);
+    calc_carry_chain(32, d, 1, res, 0);
+
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u8 or_byte(u8 d, u8 s)
+{
+    u8 res;    /* all operands in native machine order */
+
+    res = d | s;
+    no_carry_byte_side_eff(res);
+
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u16 or_word(u16 d, u16 s)
+{
+    u16 res;   /* all operands in native machine order */
+
+    res = d | s;
+    no_carry_word_side_eff(res);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u32 or_long(u32 d, u32 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d | s;
+    no_carry_long_side_eff(res);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u8 neg_byte(u8 s)
+{
+    u8 res;
+
+    CONDITIONAL_SET_FLAG(s != 0, F_CF);
+    res = (u8)-s;
+    set_szp_flags_8(res);
+    calc_borrow_chain(8, 0, s, res, 0);
+
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u16 neg_word(u16 s)
+{
+    u16 res;
+
+    CONDITIONAL_SET_FLAG(s != 0, F_CF);
+    res = (u16)-s;
+    set_szp_flags_16((u16)res);
+    calc_borrow_chain(16, 0, s, res, 0);
+
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u32 neg_long(u32 s)
+{
+    u32 res;
+
+    CONDITIONAL_SET_FLAG(s != 0, F_CF);
+    res = (u32)-s;
+    set_szp_flags_32(res);
+    calc_borrow_chain(32, 0, s, res, 0);
+
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the NOT instruction and side effects.
+****************************************************************************/
+u8 not_byte(u8 s)
+{
+    return ~s;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the NOT instruction and side effects.
+****************************************************************************/
+u16 not_word(u16 s)
+{
+    return ~s;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the NOT instruction and side effects.
+****************************************************************************/
+u32 not_long(u32 s)
+{
+    return ~s;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCL instruction and side effects.
+****************************************************************************/
+u8 rcl_byte(u8 d, u8 s)
+{
+    unsigned int res, cnt, mask, cf;
+
+    /* s is the rotate distance.  It varies from 0 - 8. */
+    /* have
+
+       CF  B_7 B_6 B_5 B_4 B_3 B_2 B_1 B_0
+
+       want to rotate through the carry by "s" bits.  We could
+       loop, but that's inefficient.  So the width is 9,
+       and we split into three parts:
+
+       The new carry flag   (was B_n)
+       the stuff in B_n-1 .. B_0
+       the stuff in B_7 .. B_n+1
+
+       The new rotate is done mod 9, and given this,
+       for a rotation of n bits (mod 9) the new carry flag is
+       then located n bits from the MSB.  The low part is
+       then shifted up cnt bits, and the high part is or'd
+       in.  Using CAPS for new values, and lowercase for the
+       original values, this can be expressed as:
+
+       IF n > 0
+       1) CF <-  b_(8-n)
+       2) B_(7) .. B_(n)  <-  b_(8-(n+1)) .. b_0
+       3) B_(n-1) <- cf
+       4) B_(n-2) .. B_0 <-  b_7 .. b_(8-(n-1))
+     */
+    res = d;
+    if ((cnt = s % 9) != 0) {
+        /* extract the new CARRY FLAG. */
+        /* CF <-  b_(8-n)             */
+        cf = (d >> (8 - cnt)) & 0x1;
+
+        /* get the low stuff which rotated
+           into the range B_7 .. B_cnt */
+        /* B_(7) .. B_(n)  <-  b_(8-(n+1)) .. b_0  */
+        /* note that the right hand side done by the mask */
+        res = (d << cnt) & 0xff;
+
+        /* now the high stuff which rotated around
+           into the positions B_cnt-2 .. B_0 */
+        /* B_(n-2) .. B_0 <-  b_7 .. b_(8-(n-1)) */
+        /* shift it downward, 7-(n-2) = 9-n positions.
+           and mask off the result before or'ing in.
+         */
+        mask = (1 << (cnt - 1)) - 1;
+        res |= (d >> (9 - cnt)) & mask;
+
+        /* if the carry flag was set, or it in.  */
+        if (ACCESS_FLAG(F_CF)) {     /* carry flag is set */
+            /*  B_(n-1) <- cf */
+            res |= 1 << (cnt - 1);
+        }
+        /* set the new carry flag, based on the variable "cf" */
+        CONDITIONAL_SET_FLAG(cf, F_CF);
+        /* OVERFLOW is set *IFF* cnt==1, then it is the
+           xor of CF and the most significant bit.  Blecck. */
+        /* parenthesized this expression since it appears to
+           be causing OF to be misset */
+        CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 6) & 0x2)),
+                             F_OF);
+
+    }
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCL instruction and side effects.
+****************************************************************************/
+u16 rcl_word(u16 d, u8 s)
+{
+    unsigned int res, cnt, mask, cf;
+
+    res = d;
+    if ((cnt = s % 17) != 0) {
+        cf = (d >> (16 - cnt)) & 0x1;
+        res = (d << cnt) & 0xffff;
+        mask = (1 << (cnt - 1)) - 1;
+        res |= (d >> (17 - cnt)) & mask;
+        if (ACCESS_FLAG(F_CF)) {
+            res |= 1 << (cnt - 1);
+        }
+        CONDITIONAL_SET_FLAG(cf, F_CF);
+        CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 14) & 0x2)),
+                             F_OF);
+    }
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCL instruction and side effects.
+****************************************************************************/
+u32 rcl_long(u32 d, u8 s)
+{
+    u32 res, cnt, mask, cf;
+
+    res = d;
+    if ((cnt = s % 33) != 0) {
+        cf = (d >> (32 - cnt)) & 0x1;
+        res = (d << cnt) & 0xffffffff;
+        mask = (1 << (cnt - 1)) - 1;
+        res |= (d >> (33 - cnt)) & mask;
+        if (ACCESS_FLAG(F_CF)) {     /* carry flag is set */
+            res |= 1 << (cnt - 1);
+        }
+        CONDITIONAL_SET_FLAG(cf, F_CF);
+        CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 30) & 0x2)),
+                             F_OF);
+    }
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCR instruction and side effects.
+****************************************************************************/
+u8 rcr_byte(u8 d, u8 s)
+{
+    u32 res, cnt;
+    u32 mask, cf, ocf = 0;
+
+    /* rotate right through carry */
+    /*
+       s is the rotate distance.  It varies from 0 - 8.
+       d is the byte object rotated.
+
+       have
+
+       CF  B_7 B_6 B_5 B_4 B_3 B_2 B_1 B_0
+
+       The new rotate is done mod 9, and given this,
+       for a rotation of n bits (mod 9) the new carry flag is
+       then located n bits from the LSB.  The low part is
+       then shifted up cnt bits, and the high part is or'd
+       in.  Using CAPS for new values, and lowercase for the
+       original values, this can be expressed as:
+
+       IF n > 0
+       1) CF <-  b_(n-1)
+       2) B_(8-(n+1)) .. B_(0)  <-  b_(7) .. b_(n)
+       3) B_(8-n) <- cf
+       4) B_(7) .. B_(8-(n-1)) <-  b_(n-2) .. b_(0)
+     */
+    res = d;
+    if ((cnt = s % 9) != 0) {
+        /* extract the new CARRY FLAG. */
+        /* CF <-  b_(n-1)              */
+        if (cnt == 1) {
+            cf = d & 0x1;
+            /* note hackery here.  Access_flag(..) evaluates to either
+               0 if flag not set
+               non-zero if flag is set.
+               doing access_flag(..) != 0 casts that into either
+               0..1 in any representation of the flags register
+               (i.e. packed bit array or unpacked.)
+             */
+            ocf = ACCESS_FLAG(F_CF) != 0;
+        } else
+            cf = (d >> (cnt - 1)) & 0x1;
+
+        /* B_(8-(n+1)) .. B_(0)  <-  b_(7) .. b_n  */
+        /* note that the right hand side done by the mask
+           This is effectively done by shifting the
+           object to the right.  The result must be masked,
+           in case the object came in and was treated
+           as a negative number.  Needed??? */
+
+        mask = (1 << (8 - cnt)) - 1;
+        res = (d >> cnt) & mask;
+
+        /* now the high stuff which rotated around
+           into the positions B_cnt-2 .. B_0 */
+        /* B_(7) .. B_(8-(n-1)) <-  b_(n-2) .. b_(0) */
+        /* shift it downward, 7-(n-2) = 9-n positions.
+           and mask off the result before or'ing in.
+         */
+        res |= (d << (9 - cnt));
+
+        /* if the carry flag was set, or it in.  */
+        if (ACCESS_FLAG(F_CF)) {     /* carry flag is set */
+            /*  B_(8-n) <- cf */
+            res |= 1 << (8 - cnt);
+        }
+        /* set the new carry flag, based on the variable "cf" */
+        CONDITIONAL_SET_FLAG(cf, F_CF);
+        /* OVERFLOW is set *IFF* cnt==1, then it is the
+           xor of CF and the most significant bit.  Blecck. */
+        /* parenthesized... */
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 6) & 0x2)),
+                                 F_OF);
+        }
+    }
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCR instruction and side effects.
+****************************************************************************/
+u16 rcr_word(u16 d, u8 s)
+{
+    u32 res, cnt;
+    u32 mask, cf, ocf = 0;
+
+    /* rotate right through carry */
+    res = d;
+    if ((cnt = s % 17) != 0) {
+        if (cnt == 1) {
+            cf = d & 0x1;
+            ocf = ACCESS_FLAG(F_CF) != 0;
+        } else
+            cf = (d >> (cnt - 1)) & 0x1;
+        mask = (1 << (16 - cnt)) - 1;
+        res = (d >> cnt) & mask;
+        res |= (d << (17 - cnt));
+        if (ACCESS_FLAG(F_CF)) {
+            res |= 1 << (16 - cnt);
+        }
+        CONDITIONAL_SET_FLAG(cf, F_CF);
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 14) & 0x2)),
+                                 F_OF);
+        }
+    }
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCR instruction and side effects.
+****************************************************************************/
+u32 rcr_long(u32 d, u8 s)
+{
+    u32 res, cnt;
+    u32 mask, cf, ocf = 0;
+
+    /* rotate right through carry */
+    res = d;
+    if ((cnt = s % 33) != 0) {
+        if (cnt == 1) {
+            cf = d & 0x1;
+            ocf = ACCESS_FLAG(F_CF) != 0;
+        } else
+            cf = (d >> (cnt - 1)) & 0x1;
+        mask = (1 << (32 - cnt)) - 1;
+        res = (d >> cnt) & mask;
+        if (cnt != 1)
+            res |= (d << (33 - cnt));
+        if (ACCESS_FLAG(F_CF)) {     /* carry flag is set */
+            res |= 1 << (32 - cnt);
+        }
+        CONDITIONAL_SET_FLAG(cf, F_CF);
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 30) & 0x2)),
+                                 F_OF);
+        }
+    }
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROL instruction and side effects.
+****************************************************************************/
+u8 rol_byte(u8 d, u8 s)
+{
+    unsigned int res, cnt, mask;
+
+    /* rotate left */
+    /*
+       s is the rotate distance.  It varies from 0 - 8.
+       d is the byte object rotated.
+
+       have
+
+       CF  B_7 ... B_0
+
+       The new rotate is done mod 8.
+       Much simpler than the "rcl" or "rcr" operations.
+
+       IF n > 0
+       1) B_(7) .. B_(n)  <-  b_(8-(n+1)) .. b_(0)
+       2) B_(n-1) .. B_(0) <-  b_(7) .. b_(8-n)
+     */
+    res = d;
+    if ((cnt = s % 8) != 0) {
+        /* B_(7) .. B_(n)  <-  b_(8-(n+1)) .. b_(0) */
+        res = (d << cnt);
+
+        /* B_(n-1) .. B_(0) <-  b_(7) .. b_(8-n) */
+        mask = (1 << cnt) - 1;
+        res |= (d >> (8 - cnt)) & mask;
+
+        /* set the new carry flag, Note that it is the low order
+           bit of the result!!!                               */
+        CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+        /* OVERFLOW is set *IFF* s==1, then it is the
+           xor of CF and the most significant bit.  Blecck. */
+        CONDITIONAL_SET_FLAG(s == 1 &&
+                             XOR2((res & 0x1) + ((res >> 6) & 0x2)),
+                             F_OF);
+    } if (s != 0) {
+        /* set the new carry flag, Note that it is the low order
+           bit of the result!!!                               */
+        CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+    }
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROL instruction and side effects.
+****************************************************************************/
+u16 rol_word(u16 d, u8 s)
+{
+    unsigned int res, cnt, mask;
+
+    res = d;
+    if ((cnt = s % 16) != 0) {
+        res = (d << cnt);
+        mask = (1 << cnt) - 1;
+        res |= (d >> (16 - cnt)) & mask;
+        CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+        CONDITIONAL_SET_FLAG(s == 1 &&
+                             XOR2((res & 0x1) + ((res >> 14) & 0x2)),
+                             F_OF);
+    } if (s != 0) {
+        /* set the new carry flag, Note that it is the low order
+           bit of the result!!!                               */
+        CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+    }
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROL instruction and side effects.
+****************************************************************************/
+u32 rol_long(u32 d, u8 s)
+{
+    u32 res, cnt, mask;
+
+    res = d;
+    if ((cnt = s % 32) != 0) {
+        res = (d << cnt);
+        mask = (1 << cnt) - 1;
+        res |= (d >> (32 - cnt)) & mask;
+        CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+        CONDITIONAL_SET_FLAG(s == 1 &&
+                             XOR2((res & 0x1) + ((res >> 30) & 0x2)),
+                             F_OF);
+    } if (s != 0) {
+        /* set the new carry flag, Note that it is the low order
+           bit of the result!!!                               */
+        CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+    }
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROR instruction and side effects.
+****************************************************************************/
+u8 ror_byte(u8 d, u8 s)
+{
+    unsigned int res, cnt, mask;
+
+    /* rotate right */
+    /*
+       s is the rotate distance.  It varies from 0 - 8.
+       d is the byte object rotated.
+
+       have
+
+       B_7 ... B_0
+
+       The rotate is done mod 8.
+
+       IF n > 0
+       1) B_(8-(n+1)) .. B_(0)  <-  b_(7) .. b_(n)
+       2) B_(7) .. B_(8-n) <-  b_(n-1) .. b_(0)
+     */
+    res = d;
+    if ((cnt = s % 8) != 0) {           /* not a typo, do nada if cnt==0 */
+        /* B_(7) .. B_(8-n) <-  b_(n-1) .. b_(0) */
+        res = (d << (8 - cnt));
+
+        /* B_(8-(n+1)) .. B_(0)  <-  b_(7) .. b_(n) */
+        mask = (1 << (8 - cnt)) - 1;
+        res |= (d >> (cnt)) & mask;
+
+        /* set the new carry flag, Note that it is the low order
+           bit of the result!!!                               */
+        CONDITIONAL_SET_FLAG(res & 0x80, F_CF);
+        /* OVERFLOW is set *IFF* s==1, then it is the
+           xor of the two most significant bits.  Blecck. */
+        CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 6), F_OF);
+    } else if (s != 0) {
+        /* set the new carry flag, Note that it is the low order
+           bit of the result!!!                               */
+        CONDITIONAL_SET_FLAG(res & 0x80, F_CF);
+    }
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROR instruction and side effects.
+****************************************************************************/
+u16 ror_word(u16 d, u8 s)
+{
+    unsigned int res, cnt, mask;
+
+    res = d;
+    if ((cnt = s % 16) != 0) {
+        res = (d << (16 - cnt));
+        mask = (1 << (16 - cnt)) - 1;
+        res |= (d >> (cnt)) & mask;
+        CONDITIONAL_SET_FLAG(res & 0x8000, F_CF);
+        CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 14), F_OF);
+    } else if (s != 0) {
+        /* set the new carry flag, Note that it is the low order
+           bit of the result!!!                               */
+        CONDITIONAL_SET_FLAG(res & 0x8000, F_CF);
+    }
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROR instruction and side effects.
+****************************************************************************/
+u32 ror_long(u32 d, u8 s)
+{
+    u32 res, cnt, mask;
+
+    res = d;
+    if ((cnt = s % 32) != 0) {
+        res = (d << (32 - cnt));
+        mask = (1 << (32 - cnt)) - 1;
+        res |= (d >> (cnt)) & mask;
+        CONDITIONAL_SET_FLAG(res & 0x80000000, F_CF);
+        CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 30), F_OF);
+    } else if (s != 0) {
+        /* set the new carry flag, Note that it is the low order
+           bit of the result!!!                               */
+        CONDITIONAL_SET_FLAG(res & 0x80000000, F_CF);
+    }
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHL instruction and side effects.
+****************************************************************************/
+u8 shl_byte(u8 d, u8 s)
+{
+    unsigned int cnt, res, cf;
+
+    if (s < 8) {
+        cnt = s % 8;
+
+        /* last bit shifted out goes into carry flag */
+        if (cnt > 0) {
+            res = d << cnt;
+            cf = d & (1 << (8 - cnt));
+            CONDITIONAL_SET_FLAG(cf, F_CF);
+            set_szp_flags_8((u8)res);
+        } else {
+            res = (u8) d;
+        }
+
+        if (cnt == 1) {
+            /* Needs simplification. */
+            CONDITIONAL_SET_FLAG(
+                                    (((res & 0x80) == 0x80) ^
+                                     (ACCESS_FLAG(F_CF) != 0)),
+            /* was (M.x86.R_FLG&F_CF)==F_CF)), */
+                                    F_OF);
+        } else {
+            CLEAR_FLAG(F_OF);
+        }
+    } else {
+        res = 0;
+        CONDITIONAL_SET_FLAG((d << (s-1)) & 0x80, F_CF);
+        CLEAR_FLAG(F_OF);
+        CLEAR_FLAG(F_SF);
+        SET_FLAG(F_PF);
+        SET_FLAG(F_ZF);
+    }
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHL instruction and side effects.
+****************************************************************************/
+u16 shl_word(u16 d, u8 s)
+{
+    unsigned int cnt, res, cf;
+
+    if (s < 16) {
+        cnt = s % 16;
+        if (cnt > 0) {
+            res = d << cnt;
+            cf = d & (1 << (16 - cnt));
+            CONDITIONAL_SET_FLAG(cf, F_CF);
+            set_szp_flags_16((u16)res);
+        } else {
+            res = (u16) d;
+        }
+
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG(
+                                    (((res & 0x8000) == 0x8000) ^
+                                     (ACCESS_FLAG(F_CF) != 0)),
+                                    F_OF);
+        } else {
+            CLEAR_FLAG(F_OF);
+        }
+    } else {
+        res = 0;
+        CONDITIONAL_SET_FLAG((d << (s-1)) & 0x8000, F_CF);
+        CLEAR_FLAG(F_OF);
+        CLEAR_FLAG(F_SF);
+        SET_FLAG(F_PF);
+        SET_FLAG(F_ZF);
+    }
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHL instruction and side effects.
+****************************************************************************/
+u32 shl_long(u32 d, u8 s)
+{
+    unsigned int cnt, res, cf;
+
+    if (s < 32) {
+        cnt = s % 32;
+        if (cnt > 0) {
+            res = d << cnt;
+            cf = d & (1 << (32 - cnt));
+            CONDITIONAL_SET_FLAG(cf, F_CF);
+            set_szp_flags_32((u32)res);
+        } else {
+            res = d;
+        }
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG((((res & 0x80000000) == 0x80000000) ^
+                                  (ACCESS_FLAG(F_CF) != 0)), F_OF);
+        } else {
+            CLEAR_FLAG(F_OF);
+        }
+    } else {
+        res = 0;
+        CONDITIONAL_SET_FLAG((d << (s-1)) & 0x80000000, F_CF);
+        CLEAR_FLAG(F_OF);
+        CLEAR_FLAG(F_SF);
+        SET_FLAG(F_PF);
+        SET_FLAG(F_ZF);
+    }
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHR instruction and side effects.
+****************************************************************************/
+u8 shr_byte(u8 d, u8 s)
+{
+    unsigned int cnt, res, cf;
+
+    if (s < 8) {
+        cnt = s % 8;
+        if (cnt > 0) {
+            cf = d & (1 << (cnt - 1));
+            res = d >> cnt;
+            CONDITIONAL_SET_FLAG(cf, F_CF);
+            set_szp_flags_8((u8)res);
+        } else {
+            res = (u8) d;
+        }
+
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG(XOR2(res >> 6), F_OF);
+        } else {
+            CLEAR_FLAG(F_OF);
+        }
+    } else {
+        res = 0;
+        CONDITIONAL_SET_FLAG((d >> (s-1)) & 0x1, F_CF);
+        CLEAR_FLAG(F_OF);
+        CLEAR_FLAG(F_SF);
+        SET_FLAG(F_PF);
+        SET_FLAG(F_ZF);
+    }
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHR instruction and side effects.
+****************************************************************************/
+u16 shr_word(u16 d, u8 s)
+{
+    unsigned int cnt, res, cf;
+
+    if (s < 16) {
+        cnt = s % 16;
+        if (cnt > 0) {
+            cf = d & (1 << (cnt - 1));
+            res = d >> cnt;
+            CONDITIONAL_SET_FLAG(cf, F_CF);
+            set_szp_flags_16((u16)res);
+        } else {
+            res = d;
+        }
+
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG(XOR2(res >> 14), F_OF);
+        } else {
+            CLEAR_FLAG(F_OF);
+        }
+    } else {
+        res = 0;
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_OF);
+        SET_FLAG(F_ZF);
+        CLEAR_FLAG(F_SF);
+        CLEAR_FLAG(F_PF);
+    }
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHR instruction and side effects.
+****************************************************************************/
+u32 shr_long(u32 d, u8 s)
+{
+    unsigned int cnt, res, cf;
+
+    if (s < 32) {
+        cnt = s % 32;
+        if (cnt > 0) {
+            cf = d & (1 << (cnt - 1));
+            res = d >> cnt;
+            CONDITIONAL_SET_FLAG(cf, F_CF);
+            set_szp_flags_32((u32)res);
+        } else {
+            res = d;
+        }
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG(XOR2(res >> 30), F_OF);
+        } else {
+            CLEAR_FLAG(F_OF);
+        }
+    } else {
+        res = 0;
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_OF);
+        SET_FLAG(F_ZF);
+        CLEAR_FLAG(F_SF);
+        CLEAR_FLAG(F_PF);
+    }
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SAR instruction and side effects.
+****************************************************************************/
+u8 sar_byte(u8 d, u8 s)
+{
+    unsigned int cnt, res, cf, mask, sf;
+
+    res = d;
+    sf = d & 0x80;
+    cnt = s % 8;
+    if (cnt > 0 && cnt < 8) {
+        mask = (1 << (8 - cnt)) - 1;
+        cf = d & (1 << (cnt - 1));
+        res = (d >> cnt) & mask;
+        CONDITIONAL_SET_FLAG(cf, F_CF);
+        if (sf) {
+            res |= ~mask;
+        }
+        set_szp_flags_8((u8)res);
+    } else if (cnt >= 8) {
+        if (sf) {
+            res = 0xff;
+            SET_FLAG(F_CF);
+            CLEAR_FLAG(F_ZF);
+            SET_FLAG(F_SF);
+            SET_FLAG(F_PF);
+        } else {
+            res = 0;
+            CLEAR_FLAG(F_CF);
+            SET_FLAG(F_ZF);
+            CLEAR_FLAG(F_SF);
+            CLEAR_FLAG(F_PF);
+        }
+    }
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SAR instruction and side effects.
+****************************************************************************/
+u16 sar_word(u16 d, u8 s)
+{
+    unsigned int cnt, res, cf, mask, sf;
+
+    sf = d & 0x8000;
+    cnt = s % 16;
+    res = d;
+    if (cnt > 0 && cnt < 16) {
+        mask = (1 << (16 - cnt)) - 1;
+        cf = d & (1 << (cnt - 1));
+        res = (d >> cnt) & mask;
+        CONDITIONAL_SET_FLAG(cf, F_CF);
+        if (sf) {
+            res |= ~mask;
+        }
+        set_szp_flags_16((u16)res);
+    } else if (cnt >= 16) {
+        if (sf) {
+            res = 0xffff;
+            SET_FLAG(F_CF);
+            CLEAR_FLAG(F_ZF);
+            SET_FLAG(F_SF);
+            SET_FLAG(F_PF);
+        } else {
+            res = 0;
+            CLEAR_FLAG(F_CF);
+            SET_FLAG(F_ZF);
+            CLEAR_FLAG(F_SF);
+            CLEAR_FLAG(F_PF);
+        }
+    }
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SAR instruction and side effects.
+****************************************************************************/
+u32 sar_long(u32 d, u8 s)
+{
+    u32 cnt, res, cf, mask, sf;
+
+    sf = d & 0x80000000;
+    cnt = s % 32;
+    res = d;
+    if (cnt > 0 && cnt < 32) {
+        mask = (1 << (32 - cnt)) - 1;
+        cf = d & (1 << (cnt - 1));
+        res = (d >> cnt) & mask;
+        CONDITIONAL_SET_FLAG(cf, F_CF);
+        if (sf) {
+            res |= ~mask;
+        }
+        set_szp_flags_32(res);
+    } else if (cnt >= 32) {
+        if (sf) {
+            res = 0xffffffff;
+            SET_FLAG(F_CF);
+            CLEAR_FLAG(F_ZF);
+            SET_FLAG(F_SF);
+            SET_FLAG(F_PF);
+        } else {
+            res = 0;
+            CLEAR_FLAG(F_CF);
+            SET_FLAG(F_ZF);
+            CLEAR_FLAG(F_SF);
+            CLEAR_FLAG(F_PF);
+        }
+    }
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHLD instruction and side effects.
+****************************************************************************/
+u16 shld_word (u16 d, u16 fill, u8 s)
+{
+    unsigned int cnt, res, cf;
+
+    if (s < 16) {
+        cnt = s % 16;
+        if (cnt > 0) {
+            res = (d << cnt) | (fill >> (16-cnt));
+            cf = d & (1 << (16 - cnt));
+            CONDITIONAL_SET_FLAG(cf, F_CF);
+            set_szp_flags_16((u16)res);
+        } else {
+            res = d;
+        }
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG((((res & 0x8000) == 0x8000) ^
+                                  (ACCESS_FLAG(F_CF) != 0)), F_OF);
+        } else {
+            CLEAR_FLAG(F_OF);
+        }
+    } else {
+        res = 0;
+        CONDITIONAL_SET_FLAG((d << (s-1)) & 0x8000, F_CF);
+        CLEAR_FLAG(F_OF);
+        CLEAR_FLAG(F_SF);
+        SET_FLAG(F_PF);
+        SET_FLAG(F_ZF);
+    }
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHLD instruction and side effects.
+****************************************************************************/
+u32 shld_long (u32 d, u32 fill, u8 s)
+{
+    unsigned int cnt, res, cf;
+
+    if (s < 32) {
+        cnt = s % 32;
+        if (cnt > 0) {
+            res = (d << cnt) | (fill >> (32-cnt));
+            cf = d & (1 << (32 - cnt));
+            CONDITIONAL_SET_FLAG(cf, F_CF);
+            set_szp_flags_32((u32)res);
+        } else {
+            res = d;
+        }
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG((((res & 0x80000000) == 0x80000000) ^
+                                  (ACCESS_FLAG(F_CF) != 0)), F_OF);
+        } else {
+            CLEAR_FLAG(F_OF);
+        }
+    } else {
+        res = 0;
+        CONDITIONAL_SET_FLAG((d << (s-1)) & 0x80000000, F_CF);
+        CLEAR_FLAG(F_OF);
+        CLEAR_FLAG(F_SF);
+        SET_FLAG(F_PF);
+        SET_FLAG(F_ZF);
+    }
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHRD instruction and side effects.
+****************************************************************************/
+u16 shrd_word (u16 d, u16 fill, u8 s)
+{
+    unsigned int cnt, res, cf;
+
+    if (s < 16) {
+        cnt = s % 16;
+        if (cnt > 0) {
+            cf = d & (1 << (cnt - 1));
+            res = (d >> cnt) | (fill << (16 - cnt));
+            CONDITIONAL_SET_FLAG(cf, F_CF);
+            set_szp_flags_16((u16)res);
+        } else {
+            res = d;
+        }
+
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG(XOR2(res >> 14), F_OF);
+        } else {
+            CLEAR_FLAG(F_OF);
+        }
+    } else {
+        res = 0;
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_OF);
+        SET_FLAG(F_ZF);
+        CLEAR_FLAG(F_SF);
+        CLEAR_FLAG(F_PF);
+    }
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHRD instruction and side effects.
+****************************************************************************/
+u32 shrd_long (u32 d, u32 fill, u8 s)
+{
+    unsigned int cnt, res, cf;
+
+    if (s < 32) {
+        cnt = s % 32;
+        if (cnt > 0) {
+            cf = d & (1 << (cnt - 1));
+            res = (d >> cnt) | (fill << (32 - cnt));
+            CONDITIONAL_SET_FLAG(cf, F_CF);
+            set_szp_flags_32((u32)res);
+        } else {
+            res = d;
+        }
+        if (cnt == 1) {
+            CONDITIONAL_SET_FLAG(XOR2(res >> 30), F_OF);
+        } else {
+            CLEAR_FLAG(F_OF);
+        }
+    } else {
+        res = 0;
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_OF);
+        SET_FLAG(F_ZF);
+        CLEAR_FLAG(F_SF);
+        CLEAR_FLAG(F_PF);
+    }
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SBB instruction and side effects.
+****************************************************************************/
+u8 sbb_byte(u8 d, u8 s)
+{
+    u32 res;   /* all operands in native machine order */
+    u32 bc;
+
+    if (ACCESS_FLAG(F_CF))
+        res = d - s - 1;
+    else
+        res = d - s;
+    set_szp_flags_8((u8)res);
+
+    /* calculate the borrow chain.  See note at top */
+    bc = (res & (~d | s)) | (~d & s);
+    CONDITIONAL_SET_FLAG(bc & 0x80, F_CF);
+    CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF);
+    CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SBB instruction and side effects.
+****************************************************************************/
+u16 sbb_word(u16 d, u16 s)
+{
+    u32 res;   /* all operands in native machine order */
+    u32 bc;
+
+    if (ACCESS_FLAG(F_CF))
+        res = d - s - 1;
+    else
+        res = d - s;
+    set_szp_flags_16((u16)res);
+
+    /* calculate the borrow chain.  See note at top */
+    bc = (res & (~d | s)) | (~d & s);
+    CONDITIONAL_SET_FLAG(bc & 0x8000, F_CF);
+    CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF);
+    CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SBB instruction and side effects.
+****************************************************************************/
+u32 sbb_long(u32 d, u32 s)
+{
+    u32 res;   /* all operands in native machine order */
+    u32 bc;
+
+    if (ACCESS_FLAG(F_CF))
+        res = d - s - 1;
+    else
+        res = d - s;
+
+    set_szp_flags_32(res);
+
+    /* calculate the borrow chain.  See note at top */
+    bc = (res & (~d | s)) | (~d & s);
+    CONDITIONAL_SET_FLAG(bc & 0x80000000, F_CF);
+    CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF);
+    CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SUB instruction and side effects.
+****************************************************************************/
+u8 sub_byte(u8 d, u8 s)
+{
+    u32 res;   /* all operands in native machine order */
+    u32 bc;
+
+    res = d - s;
+    set_szp_flags_8((u8)res);
+
+    /* calculate the borrow chain.  See note at top */
+    bc = (res & (~d | s)) | (~d & s);
+    CONDITIONAL_SET_FLAG(bc & 0x80, F_CF);
+    CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF);
+    CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+    return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SUB instruction and side effects.
+****************************************************************************/
+u16 sub_word(u16 d, u16 s)
+{
+    u32 res;   /* all operands in native machine order */
+    u32 bc;
+
+    res = d - s;
+    set_szp_flags_16((u16)res);
+
+    /* calculate the borrow chain.  See note at top */
+    bc = (res & (~d | s)) | (~d & s);
+    CONDITIONAL_SET_FLAG(bc & 0x8000, F_CF);
+    CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF);
+    CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+    return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SUB instruction and side effects.
+****************************************************************************/
+u32 sub_long(u32 d, u32 s)
+{
+    u32 res;   /* all operands in native machine order */
+    u32 bc;
+
+    res = d - s;
+    set_szp_flags_32(res);
+
+    /* calculate the borrow chain.  See note at top */
+    bc = (res & (~d | s)) | (~d & s);
+    CONDITIONAL_SET_FLAG(bc & 0x80000000, F_CF);
+    CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF);
+    CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the TEST instruction and side effects.
+****************************************************************************/
+void test_byte(u8 d, u8 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d & s;
+
+    CLEAR_FLAG(F_OF);
+    set_szp_flags_8((u8)res);
+    /* AF == dont care */
+    CLEAR_FLAG(F_CF);
+}
+
+/****************************************************************************
+REMARKS:
+Implements the TEST instruction and side effects.
+****************************************************************************/
+void test_word(u16 d, u16 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d & s;
+
+    CLEAR_FLAG(F_OF);
+    set_szp_flags_16((u16)res);
+    /* AF == dont care */
+    CLEAR_FLAG(F_CF);
+}
+
+/****************************************************************************
+REMARKS:
+Implements the TEST instruction and side effects.
+****************************************************************************/
+void test_long(u32 d, u32 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d & s;
+
+    CLEAR_FLAG(F_OF);
+    set_szp_flags_32(res);
+    /* AF == dont care */
+    CLEAR_FLAG(F_CF);
+}
+
+/****************************************************************************
+REMARKS:
+Implements the XOR instruction and side effects.
+****************************************************************************/
+u8 xor_byte(u8 d, u8 s)
+{
+    u8 res;    /* all operands in native machine order */
+
+    res = d ^ s;
+    no_carry_byte_side_eff(res);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the XOR instruction and side effects.
+****************************************************************************/
+u16 xor_word(u16 d, u16 s)
+{
+    u16 res;   /* all operands in native machine order */
+
+    res = d ^ s;
+    no_carry_word_side_eff(res);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the XOR instruction and side effects.
+****************************************************************************/
+u32 xor_long(u32 d, u32 s)
+{
+    u32 res;   /* all operands in native machine order */
+
+    res = d ^ s;
+    no_carry_long_side_eff(res);
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IMUL instruction and side effects.
+****************************************************************************/
+void imul_byte(u8 s)
+{
+    s16 res = (s16)((s8)M.x86.R_AL * (s8)s);
+
+    M.x86.R_AX = res;
+    if (((M.x86.R_AL & 0x80) == 0 && M.x86.R_AH == 0x00) ||
+        ((M.x86.R_AL & 0x80) != 0 && M.x86.R_AH == 0xFF)) {
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_OF);
+    } else {
+        SET_FLAG(F_CF);
+        SET_FLAG(F_OF);
+    }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IMUL instruction and side effects.
+****************************************************************************/
+void imul_word(u16 s)
+{
+    s32 res = (s16)M.x86.R_AX * (s16)s;
+
+    M.x86.R_AX = (u16)res;
+    M.x86.R_DX = (u16)(res >> 16);
+    if (((M.x86.R_AX & 0x8000) == 0 && M.x86.R_DX == 0x0000) ||
+        ((M.x86.R_AX & 0x8000) != 0 && M.x86.R_DX == 0xFFFF)) {
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_OF);
+    } else {
+        SET_FLAG(F_CF);
+        SET_FLAG(F_OF);
+    }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IMUL instruction and side effects.
+****************************************************************************/
+void imul_long_direct(u32 *res_lo, u32* res_hi,u32 d, u32 s)
+{
+#ifdef  __HAS_LONG_LONG__
+    s64 res = (s32)d * (s32)s;
+
+    *res_lo = (u32)res;
+    *res_hi = (u32)(res >> 32);
+#else
+    u32 d_lo,d_hi,d_sign;
+    u32 s_lo,s_hi,s_sign;
+    u32 rlo_lo,rlo_hi,rhi_lo;
+
+    if ((d_sign = d & 0x80000000) != 0)
+        d = -d;
+    d_lo = d & 0xFFFF;
+    d_hi = d >> 16;
+    if ((s_sign = s & 0x80000000) != 0)
+        s = -s;
+    s_lo = s & 0xFFFF;
+    s_hi = s >> 16;
+    rlo_lo = d_lo * s_lo;
+    rlo_hi = (d_hi * s_lo + d_lo * s_hi) + (rlo_lo >> 16);
+    rhi_lo = d_hi * s_hi + (rlo_hi >> 16);
+    *res_lo = (rlo_hi << 16) | (rlo_lo & 0xFFFF);
+    *res_hi = rhi_lo;
+    if (d_sign != s_sign) {
+        d = ~*res_lo;
+        s = (((d & 0xFFFF) + 1) >> 16) + (d >> 16);
+        *res_lo = ~*res_lo+1;
+        *res_hi = ~*res_hi+(s >> 16);
+        }
+#endif
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IMUL instruction and side effects.
+****************************************************************************/
+void imul_long(u32 s)
+{
+    imul_long_direct(&M.x86.R_EAX,&M.x86.R_EDX,M.x86.R_EAX,s);
+    if (((M.x86.R_EAX & 0x80000000) == 0 && M.x86.R_EDX == 0x00000000) ||
+        ((M.x86.R_EAX & 0x80000000) != 0 && M.x86.R_EDX == 0xFFFFFFFF)) {
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_OF);
+    } else {
+        SET_FLAG(F_CF);
+        SET_FLAG(F_OF);
+    }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the MUL instruction and side effects.
+****************************************************************************/
+void mul_byte(u8 s)
+{
+    u16 res = (u16)(M.x86.R_AL * s);
+
+    M.x86.R_AX = res;
+    if (M.x86.R_AH == 0) {
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_OF);
+    } else {
+        SET_FLAG(F_CF);
+        SET_FLAG(F_OF);
+    }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the MUL instruction and side effects.
+****************************************************************************/
+void mul_word(u16 s)
+{
+    u32 res = M.x86.R_AX * s;
+
+    M.x86.R_AX = (u16)res;
+    M.x86.R_DX = (u16)(res >> 16);
+    if (M.x86.R_DX == 0) {
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_OF);
+    } else {
+        SET_FLAG(F_CF);
+        SET_FLAG(F_OF);
+    }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the MUL instruction and side effects.
+****************************************************************************/
+void mul_long(u32 s)
+{
+#ifdef  __HAS_LONG_LONG__
+    u64 res = (u32)M.x86.R_EAX * (u32)s;
+
+    M.x86.R_EAX = (u32)res;
+    M.x86.R_EDX = (u32)(res >> 32);
+#else
+    u32 a,a_lo,a_hi;
+    u32 s_lo,s_hi;
+    u32 rlo_lo,rlo_hi,rhi_lo;
+
+    a = M.x86.R_EAX;
+    a_lo = a & 0xFFFF;
+    a_hi = a >> 16;
+    s_lo = s & 0xFFFF;
+    s_hi = s >> 16;
+    rlo_lo = a_lo * s_lo;
+    rlo_hi = (a_hi * s_lo + a_lo * s_hi) + (rlo_lo >> 16);
+    rhi_lo = a_hi * s_hi + (rlo_hi >> 16);
+    M.x86.R_EAX = (rlo_hi << 16) | (rlo_lo & 0xFFFF);
+    M.x86.R_EDX = rhi_lo;
+#endif
+    if (M.x86.R_EDX == 0) {
+        CLEAR_FLAG(F_CF);
+        CLEAR_FLAG(F_OF);
+    } else {
+        SET_FLAG(F_CF);
+        SET_FLAG(F_OF);
+    }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IDIV instruction and side effects.
+****************************************************************************/
+void idiv_byte(u8 s)
+{
+    s32 dvd, div, mod;
+
+    dvd = (s16)M.x86.R_AX;
+    if (s == 0) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    div = dvd / (s8)s;
+    mod = dvd % (s8)s;
+    if (abs(div) > 0x7f) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    M.x86.R_AL = (s8) div;
+    M.x86.R_AH = (s8) mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IDIV instruction and side effects.
+****************************************************************************/
+void idiv_word(u16 s)
+{
+    s32 dvd, div, mod;
+
+    dvd = (((s32)M.x86.R_DX) << 16) | M.x86.R_AX;
+    if (s == 0) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    div = dvd / (s16)s;
+    mod = dvd % (s16)s;
+    if (abs(div) > 0x7fff) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    CLEAR_FLAG(F_CF);
+    CLEAR_FLAG(F_SF);
+    CONDITIONAL_SET_FLAG(div == 0, F_ZF);
+    set_parity_flag(mod);
+
+    M.x86.R_AX = (u16)div;
+    M.x86.R_DX = (u16)mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IDIV instruction and side effects.
+****************************************************************************/
+void idiv_long(u32 s)
+{
+#ifdef  __HAS_LONG_LONG__
+    s64 dvd, div, mod;
+
+    dvd = (((s64)M.x86.R_EDX) << 32) | M.x86.R_EAX;
+    if (s == 0) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    div = dvd / (s32)s;
+    mod = dvd % (s32)s;
+    if (abs(div) > 0x7fffffff) {
+        x86emu_intr_raise(0);
+        return;
+    }
+#else
+    s32 div = 0, mod;
+    s32 h_dvd = M.x86.R_EDX;
+    u32 l_dvd = M.x86.R_EAX;
+    u32 abs_s = s & 0x7FFFFFFF;
+    u32 abs_h_dvd = h_dvd & 0x7FFFFFFF;
+    u32 h_s = abs_s >> 1;
+    u32 l_s = abs_s << 31;
+    int counter = 31;
+    int carry;
+
+    if (s == 0) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    do {
+        div <<= 1;
+        carry = (l_dvd >= l_s) ? 0 : 1;
+
+        if (abs_h_dvd < (h_s + carry)) {
+            h_s >>= 1;
+            l_s = abs_s << (--counter);
+            continue;
+        } else {
+            abs_h_dvd -= (h_s + carry);
+            l_dvd = carry ? ((0xFFFFFFFF - l_s) + l_dvd + 1)
+                : (l_dvd - l_s);
+            h_s >>= 1;
+            l_s = abs_s << (--counter);
+            div |= 1;
+            continue;
+        }
+
+    } while (counter > -1);
+    /* overflow */
+    if (abs_h_dvd || (l_dvd > abs_s)) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    /* sign */
+    div |= ((h_dvd & 0x10000000) ^ (s & 0x10000000));
+    mod = l_dvd;
+
+#endif
+    CLEAR_FLAG(F_CF);
+    CLEAR_FLAG(F_AF);
+    CLEAR_FLAG(F_SF);
+    SET_FLAG(F_ZF);
+    set_parity_flag(mod);
+
+    M.x86.R_EAX = (u32)div;
+    M.x86.R_EDX = (u32)mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DIV instruction and side effects.
+****************************************************************************/
+void div_byte(u8 s)
+{
+    u32 dvd, div, mod;
+
+    dvd = M.x86.R_AX;
+    if (s == 0) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    div = dvd / (u8)s;
+    mod = dvd % (u8)s;
+    if (abs(div) > 0xff) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    M.x86.R_AL = (u8)div;
+    M.x86.R_AH = (u8)mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DIV instruction and side effects.
+****************************************************************************/
+void div_word(u16 s)
+{
+    u32 dvd, div, mod;
+
+    dvd = (((u32)M.x86.R_DX) << 16) | M.x86.R_AX;
+    if (s == 0) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    div = dvd / (u16)s;
+    mod = dvd % (u16)s;
+    if (abs(div) > 0xffff) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    CLEAR_FLAG(F_CF);
+    CLEAR_FLAG(F_SF);
+    CONDITIONAL_SET_FLAG(div == 0, F_ZF);
+    set_parity_flag(mod);
+
+    M.x86.R_AX = (u16)div;
+    M.x86.R_DX = (u16)mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DIV instruction and side effects.
+****************************************************************************/
+void div_long(u32 s)
+{
+#ifdef  __HAS_LONG_LONG__
+    u64 dvd, div, mod;
+
+    dvd = (((u64)M.x86.R_EDX) << 32) | M.x86.R_EAX;
+    if (s == 0) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    div = dvd / (u32)s;
+    mod = dvd % (u32)s;
+    if (abs(div) > 0xffffffff) {
+        x86emu_intr_raise(0);
+        return;
+    }
+#else
+    s32 div = 0, mod;
+    s32 h_dvd = M.x86.R_EDX;
+    u32 l_dvd = M.x86.R_EAX;
+
+    u32 h_s = s;
+    u32 l_s = 0;
+    int counter = 32;
+    int carry;
+
+    if (s == 0) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    do {
+        div <<= 1;
+        carry = (l_dvd >= l_s) ? 0 : 1;
+
+        if (h_dvd < (h_s + carry)) {
+            h_s >>= 1;
+            l_s = s << (--counter);
+            continue;
+        } else {
+            h_dvd -= (h_s + carry);
+            l_dvd = carry ? ((0xFFFFFFFF - l_s) + l_dvd + 1)
+                : (l_dvd - l_s);
+            h_s >>= 1;
+            l_s = s << (--counter);
+            div |= 1;
+            continue;
+        }
+
+    } while (counter > -1);
+    /* overflow */
+    if (h_dvd || (l_dvd > s)) {
+        x86emu_intr_raise(0);
+        return;
+    }
+    mod = l_dvd;
+#endif
+    CLEAR_FLAG(F_CF);
+    CLEAR_FLAG(F_AF);
+    CLEAR_FLAG(F_SF);
+    SET_FLAG(F_ZF);
+    set_parity_flag(mod);
+
+    M.x86.R_EAX = (u32)div;
+    M.x86.R_EDX = (u32)mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IN string instruction and side effects.
+****************************************************************************/
+
+static void single_in(int size)
+{
+    if(size == 1)
+        store_data_byte_abs(M.x86.R_ES, M.x86.R_DI,(*sys_inb)(M.x86.R_DX));
+    else if (size == 2)
+        store_data_word_abs(M.x86.R_ES, M.x86.R_DI,(*sys_inw)(M.x86.R_DX));
+    else
+        store_data_long_abs(M.x86.R_ES, M.x86.R_DI,(*sys_inl)(M.x86.R_DX));
+}
+
+void ins(int size)
+{
+    int inc = size;
+
+    if (ACCESS_FLAG(F_DF)) {
+        inc = -size;
+    }
+    if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+        /* dont care whether REPE or REPNE */
+        /* in until CX is ZERO. */
+        u32 count = ((M.x86.mode & SYSMODE_PREFIX_DATA) ?
+                     M.x86.R_ECX : M.x86.R_CX);
+
+        while (count--) {
+          single_in(size);
+          M.x86.R_DI += inc;
+          }
+        M.x86.R_CX = 0;
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            M.x86.R_ECX = 0;
+        }
+        M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+    } else {
+        single_in(size);
+        M.x86.R_DI += inc;
+    }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OUT string instruction and side effects.
+****************************************************************************/
+
+static void single_out(int size)
+{
+     if(size == 1)
+       (*sys_outb)(M.x86.R_DX,fetch_data_byte_abs(M.x86.R_ES, M.x86.R_SI));
+     else if (size == 2)
+       (*sys_outw)(M.x86.R_DX,fetch_data_word_abs(M.x86.R_ES, M.x86.R_SI));
+     else
+       (*sys_outl)(M.x86.R_DX,fetch_data_long_abs(M.x86.R_ES, M.x86.R_SI));
+}
+
+void outs(int size)
+{
+    int inc = size;
+
+    if (ACCESS_FLAG(F_DF)) {
+        inc = -size;
+    }
+    if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+        /* dont care whether REPE or REPNE */
+        /* out until CX is ZERO. */
+        u32 count = ((M.x86.mode & SYSMODE_PREFIX_DATA) ?
+                     M.x86.R_ECX : M.x86.R_CX);
+        while (count--) {
+          single_out(size);
+          M.x86.R_SI += inc;
+          }
+        M.x86.R_CX = 0;
+        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+            M.x86.R_ECX = 0;
+        }
+        M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+    } else {
+        single_out(size);
+        M.x86.R_SI += inc;
+    }
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - Address to fetch word from
+
+REMARKS:
+Fetches a word from emulator memory using an absolute address.
+****************************************************************************/
+u16 mem_access_word(int addr)
+{
+DB( if (CHECK_MEM_ACCESS())
+      x86emu_check_mem_access(addr);)
+    return (*sys_rdw)(addr);
+}
+
+/****************************************************************************
+REMARKS:
+Pushes a word onto the stack.
+
+NOTE: Do not inline this, as (*sys_wrX) is already inline!
+****************************************************************************/
+void push_word(u16 w)
+{
+DB( if (CHECK_SP_ACCESS())
+      x86emu_check_sp_access();)
+    M.x86.R_SP -= 2;
+    (*sys_wrw)(((u32)M.x86.R_SS << 4)  + M.x86.R_SP, w);
+}
+
+/****************************************************************************
+REMARKS:
+Pushes a long onto the stack.
+
+NOTE: Do not inline this, as (*sys_wrX) is already inline!
+****************************************************************************/
+void push_long(u32 w)
+{
+DB( if (CHECK_SP_ACCESS())
+      x86emu_check_sp_access();)
+    M.x86.R_SP -= 4;
+    (*sys_wrl)(((u32)M.x86.R_SS << 4)  + M.x86.R_SP, w);
+}
+
+/****************************************************************************
+REMARKS:
+Pops a word from the stack.
+
+NOTE: Do not inline this, as (*sys_rdX) is already inline!
+****************************************************************************/
+u16 pop_word(void)
+{
+    u16 res;
+
+DB( if (CHECK_SP_ACCESS())
+      x86emu_check_sp_access();)
+    res = (*sys_rdw)(((u32)M.x86.R_SS << 4)  + M.x86.R_SP);
+    M.x86.R_SP += 2;
+    return res;
+}
+
+/****************************************************************************
+REMARKS:
+Pops a long from the stack.
+
+NOTE: Do not inline this, as (*sys_rdX) is already inline!
+****************************************************************************/
+u32 pop_long(void)
+{
+    u32 res;
+
+DB( if (CHECK_SP_ACCESS())
+      x86emu_check_sp_access();)
+    res = (*sys_rdl)(((u32)M.x86.R_SS << 4)  + M.x86.R_SP);
+    M.x86.R_SP += 4;
+    return res;
+}
+
diff --git a/drivers/bios_emulator/x86emu/sys.c b/drivers/bios_emulator/x86emu/sys.c
new file mode 100644
index 0000000000..bb7fcd93a9
--- /dev/null
+++ b/drivers/bios_emulator/x86emu/sys.c
@@ -0,0 +1,322 @@
+/****************************************************************************
+*
+*                       Realmode X86 Emulator Library
+*
+*               Copyright (C) 1991-2004 SciTech Software, Inc.
+*                    Copyright (C) David Mosberger-Tang
+*                      Copyright (C) 1999 Egbert Eich
+*
+*  ========================================================================
+*
+*  Permission to use, copy, modify, distribute, and sell this software and
+*  its documentation for any purpose is hereby granted without fee,
+*  provided that the above copyright notice appear in all copies and that
+*  both that copyright notice and this permission notice appear in
+*  supporting documentation, and that the name of the authors not be used
+*  in advertising or publicity pertaining to distribution of the software
+*  without specific, written prior permission.  The authors makes no
+*  representations about the suitability of this software for any purpose.
+*  It is provided "as is" without express or implied warranty.
+*
+*  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+*  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+*  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+*  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+*  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+*  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+*  PERFORMANCE OF THIS SOFTWARE.
+*
+*  ========================================================================
+*
+* Language:     ANSI C
+* Environment:  Any
+* Developer:    Kendall Bennett
+*
+* Description:  This file includes subroutines which are related to
+*               programmed I/O and memory access. Included in this module
+*               are default functions that do nothing. For real uses these
+*               functions will have to be overriden by the user library.
+*
+****************************************************************************/
+
+#include "x86emu/x86emui.h"
+
+/*------------------------- Global Variables ------------------------------*/
+
+X86EMU_sysEnv _X86EMU_env;	/* Global emulator machine state */
+X86EMU_intrFuncs _X86EMU_intrTab[256];
+
+int debug_intr;
+
+/*----------------------------- Implementation ----------------------------*/
+
+/****************************************************************************
+PARAMETERS:
+addr    - Emulator memory address to read
+
+RETURNS:
+Byte value read from emulator memory.
+
+REMARKS:
+Reads a byte value from the emulator memory.
+****************************************************************************/
+u8 X86API rdb(u32 addr)
+{
+	return 0;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - Emulator memory address to read
+
+RETURNS:
+Word value read from emulator memory.
+
+REMARKS:
+Reads a word value from the emulator memory.
+****************************************************************************/
+u16 X86API rdw(u32 addr)
+{
+	return 0;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - Emulator memory address to read
+
+RETURNS:
+Long value read from emulator memory.
+REMARKS:
+Reads a long value from the emulator memory.
+****************************************************************************/
+u32 X86API rdl(u32 addr)
+{
+	return 0;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - Emulator memory address to read
+val     - Value to store
+
+REMARKS:
+Writes a byte value to emulator memory.
+****************************************************************************/
+void X86API wrb(u32 addr, u8 val)
+{
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - Emulator memory address to read
+val     - Value to store
+
+REMARKS:
+Writes a word value to emulator memory.
+****************************************************************************/
+void X86API wrw(u32 addr, u16 val)
+{
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - Emulator memory address to read
+val     - Value to store
+
+REMARKS:
+Writes a long value to emulator memory.
+****************************************************************************/
+void X86API wrl(u32 addr, u32 val)
+{
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - PIO address to read
+RETURN:
+0
+REMARKS:
+Default PIO byte read function. Doesn't perform real inb.
+****************************************************************************/
+static u8 X86API p_inb(X86EMU_pioAddr addr)
+{
+	DB(if (DEBUG_IO_TRACE())
+	   printk("inb %#04x \n", addr);)
+		return 0;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - PIO address to read
+RETURN:
+0
+REMARKS:
+Default PIO word read function. Doesn't perform real inw.
+****************************************************************************/
+static u16 X86API p_inw(X86EMU_pioAddr addr)
+{
+	DB(if (DEBUG_IO_TRACE())
+	   printk("inw %#04x \n", addr);)
+		return 0;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - PIO address to read
+RETURN:
+0
+REMARKS:
+Default PIO long read function. Doesn't perform real inl.
+****************************************************************************/
+static u32 X86API p_inl(X86EMU_pioAddr addr)
+{
+	DB(if (DEBUG_IO_TRACE())
+	   printk("inl %#04x \n", addr);)
+		return 0;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - PIO address to write
+val     - Value to store
+REMARKS:
+Default PIO byte write function. Doesn't perform real outb.
+****************************************************************************/
+static void X86API p_outb(X86EMU_pioAddr addr, u8 val)
+{
+	DB(if (DEBUG_IO_TRACE())
+	   printk("outb %#02x -> %#04x \n", val, addr);)
+		return;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - PIO address to write
+val     - Value to store
+REMARKS:
+Default PIO word write function. Doesn't perform real outw.
+****************************************************************************/
+static void X86API p_outw(X86EMU_pioAddr addr, u16 val)
+{
+	DB(if (DEBUG_IO_TRACE())
+	   printk("outw %#04x -> %#04x \n", val, addr);)
+		return;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr    - PIO address to write
+val     - Value to store
+REMARKS:
+Default PIO ;ong write function. Doesn't perform real outl.
+****************************************************************************/
+static void X86API p_outl(X86EMU_pioAddr addr, u32 val)
+{
+	DB(if (DEBUG_IO_TRACE())
+	   printk("outl %#08x -> %#04x \n", val, addr);)
+		return;
+}
+
+/*------------------------- Global Variables ------------------------------*/
+
+u8(X86APIP sys_rdb) (u32 addr) = rdb;
+u16(X86APIP sys_rdw) (u32 addr) = rdw;
+u32(X86APIP sys_rdl) (u32 addr) = rdl;
+void (X86APIP sys_wrb) (u32 addr, u8 val) = wrb;
+void (X86APIP sys_wrw) (u32 addr, u16 val) = wrw;
+void (X86APIP sys_wrl) (u32 addr, u32 val) = wrl;
+u8(X86APIP sys_inb) (X86EMU_pioAddr addr) = p_inb;
+u16(X86APIP sys_inw) (X86EMU_pioAddr addr) = p_inw;
+u32(X86APIP sys_inl) (X86EMU_pioAddr addr) = p_inl;
+void (X86APIP sys_outb) (X86EMU_pioAddr addr, u8 val) = p_outb;
+void (X86APIP sys_outw) (X86EMU_pioAddr addr, u16 val) = p_outw;
+void (X86APIP sys_outl) (X86EMU_pioAddr addr, u32 val) = p_outl;
+
+/*----------------------------- Setup -------------------------------------*/
+
+/****************************************************************************
+PARAMETERS:
+funcs   - New memory function pointers to make active
+
+REMARKS:
+This function is used to set the pointers to functions which access
+memory space, allowing the user application to override these functions
+and hook them out as necessary for their application.
+****************************************************************************/
+void X86EMU_setupMemFuncs(X86EMU_memFuncs * funcs)
+{
+	sys_rdb = funcs->rdb;
+	sys_rdw = funcs->rdw;
+	sys_rdl = funcs->rdl;
+	sys_wrb = funcs->wrb;
+	sys_wrw = funcs->wrw;
+	sys_wrl = funcs->wrl;
+}
+
+/****************************************************************************
+PARAMETERS:
+funcs   - New programmed I/O function pointers to make active
+
+REMARKS:
+This function is used to set the pointers to functions which access
+I/O space, allowing the user application to override these functions
+and hook them out as necessary for their application.
+****************************************************************************/
+void X86EMU_setupPioFuncs(X86EMU_pioFuncs * funcs)
+{
+	sys_inb = funcs->inb;
+	sys_inw = funcs->inw;
+	sys_inl = funcs->inl;
+	sys_outb = funcs->outb;
+	sys_outw = funcs->outw;
+	sys_outl = funcs->outl;
+}
+
+/****************************************************************************
+PARAMETERS:
+funcs   - New interrupt vector table to make active
+
+REMARKS:
+This function is used to set the pointers to functions which handle
+interrupt processing in the emulator, allowing the user application to
+hook interrupts as necessary for their application. Any interrupts that
+are not hooked by the user application, and reflected and handled internally
+in the emulator via the interrupt vector table. This allows the application
+to get control when the code being emulated executes specific software
+interrupts.
+****************************************************************************/
+void X86EMU_setupIntrFuncs(X86EMU_intrFuncs funcs[])
+{
+	int i;
+
+	for (i = 0; i < 256; i++)
+		_X86EMU_intrTab[i] = NULL;
+	if (funcs) {
+		for (i = 0; i < 256; i++)
+			_X86EMU_intrTab[i] = funcs[i];
+	}
+}
+
+/****************************************************************************
+PARAMETERS:
+int - New software interrupt to prepare for
+
+REMARKS:
+This function is used to set up the emulator state to exceute a software
+interrupt. This can be used by the user application code to allow an
+interrupt to be hooked, examined and then reflected back to the emulator
+so that the code in the emulator will continue processing the software
+interrupt as per normal. This essentially allows system code to actively
+hook and handle certain software interrupts as necessary.
+****************************************************************************/
+void X86EMU_prepareForInt(int num)
+{
+	push_word((u16) M.x86.R_FLG);
+	CLEAR_FLAG(F_IF);
+	CLEAR_FLAG(F_TF);
+	push_word(M.x86.R_CS);
+	M.x86.R_CS = mem_access_word(num * 4 + 2);
+	push_word(M.x86.R_IP);
+	M.x86.R_IP = mem_access_word(num * 4);
+	M.x86.intr = 0;
+}