/*
    Intel 386 emulator

    Written by Ville Linde

    Currently supports:
        Intel 386
        Intel 486
        Intel Pentium
        Cyrix MediaGX
*/

#include "emu.h"
#include "debugger.h"
#include "i386priv.h"
#include "i386.h"

#include "debug/debugcpu.h"

/* seems to be defined on mingw-gcc */
#undef i386

int i386_parity_table[256];
MODRM_TABLE i386_MODRM_table[256];

static void i386_trap_with_error(i386_state* cpustate, int irq, int irq_gate, int trap_level, UINT32 err);
static void i286_task_switch(i386_state* cpustate, UINT16 selector, UINT8 nested);
static void i386_task_switch(i386_state* cpustate, UINT16 selector, UINT8 nested);

#define FAULT(fault,error) {i386_trap_with_error(cpustate,fault,0,0,error); return;}
#define FAULT_EXP(fault,error) {i386_trap_with_error(cpustate,fault,0,trap_level+1,error); return;}

/*************************************************************************/

#define INT_DEBUG	1

static void i386_load_protected_mode_segment(i386_state *cpustate, I386_SREG *seg )
{
	UINT32 v1,v2;
	UINT32 base, limit;
	int entry;

	if ( seg->selector & 0x4 )
	{
		base = cpustate->ldtr.base;
		limit = cpustate->ldtr.limit;
	} else {
		base = cpustate->gdtr.base;
		limit = cpustate->gdtr.limit;
	}

	if (limit == 0 || seg->selector + 7 > limit)
		return;
	entry = seg->selector & ~0x7;

	v1 = READ32(cpustate, base + entry );
	v2 = READ32(cpustate, base + entry + 4 );

	seg->flags = (v2 >> 8) & 0xf0ff;
	seg->base = (v2 & 0xff000000) | ((v2 & 0xff) << 16) | ((v1 >> 16) & 0xffff);
	seg->limit = (v2 & 0xf0000) | (v1 & 0xffff);
	if (seg->flags & 0x8000)
		seg->limit = (seg->limit << 12) | 0xfff;
	seg->d = (seg->flags & 0x4000) ? 1 : 0;
}

static void i386_load_call_gate(i386_state* cpustate, I386_CALL_GATE *gate)
{
	UINT32 v1,v2;
	UINT32 base,limit;
	int entry;

	if ( gate->segment & 0x4 )
	{
		base = cpustate->ldtr.base;
		limit = cpustate->ldtr.limit;
	} else {
		base = cpustate->gdtr.base;
		limit = cpustate->gdtr.limit;
	}

	if (limit == 0 || gate->segment + 7 > limit)
		return;

	entry = gate->segment & ~0x7;

	v1 = READ32(cpustate, base + entry );
	v2 = READ32(cpustate, base + entry + 4 );

	/* Note that for task gates, offset and dword_count are not used */
	gate->selector = (v1 >> 16) & 0xffff;
	gate->offset = (v1 & 0x0000ffff) | (v2 & 0xffff0000);
	gate->ar = (v2 >> 8) & 0xff;
	gate->dword_count = v2 & 0x001f;
	gate->present = (gate->ar >> 7) & 0x01;
	gate->dpl = (gate->ar >> 5) & 0x03;
}

static void i386_load_segment_descriptor(i386_state *cpustate, int segment )
{
	if (PROTECTED_MODE)
	{
		if (!V8086_MODE)
			i386_load_protected_mode_segment(cpustate, &cpustate->sreg[segment] );
		else
		{
			cpustate->sreg[segment].base = cpustate->sreg[segment].selector << 4;
			cpustate->sreg[segment].limit = 0xffff;
			cpustate->sreg[segment].flags = (segment == CS) ? 0x009a : 0x0092;
		}
	}
	else
	{
		cpustate->sreg[segment].base = cpustate->sreg[segment].selector << 4;

		if( segment == CS && !cpustate->performed_intersegment_jump )
			cpustate->sreg[segment].base |= 0xfff00000;
	}
}

/* Retrieves the stack selector located in the current TSS */
static UINT32 i386_get_stack_segment(i386_state* cpustate, UINT8 privilege)
{
	if(privilege >= 3)
		return 0;

	return READ32(cpustate,(cpustate->task.base+8) + (8*privilege));
}

static UINT16 i286_get_stack_segment(i386_state* cpustate, UINT8 privilege)
{
	if(privilege >= 3)
		return 0;

	return READ16(cpustate,(cpustate->task.base+4) + (4*privilege));
}

/* Retrieves the stack pointer located in the current TSS */
static UINT32 i386_get_stack_ptr(i386_state* cpustate, UINT8 privilege)
{
	if(privilege >= 3)
		return 0;

	return READ32(cpustate,(cpustate->task.base+4) + (8*privilege));
}

static UINT16 i286_get_stack_ptr(i386_state* cpustate, UINT8 privilege)
{
	if(privilege >= 3)
		return 0;

	return READ16(cpustate,(cpustate->task.base+2) + (4*privilege));
}

static UINT32 get_flags(i386_state *cpustate)
{
	UINT32 f = 0x2;
	f |= cpustate->CF;
	f |= cpustate->PF << 2;
	f |= cpustate->AF << 4;
	f |= cpustate->ZF << 6;
	f |= cpustate->SF << 7;
	f |= cpustate->TF << 8;
	f |= cpustate->IF << 9;
	f |= cpustate->DF << 10;
	f |= cpustate->OF << 11;
	f |= cpustate->IOP1 << 12;
	f |= cpustate->IOP2 << 13;
	f |= cpustate->NT << 14;
	return (cpustate->eflags & cpustate->eflags_mask) | (f & 0xffff);
}

static void set_flags(i386_state *cpustate, UINT32 f )
{
	cpustate->CF = (f & 0x1) ? 1 : 0;
	cpustate->PF = (f & 0x4) ? 1 : 0;
	cpustate->AF = (f & 0x10) ? 1 : 0;
	cpustate->ZF = (f & 0x40) ? 1 : 0;
	cpustate->SF = (f & 0x80) ? 1 : 0;
	cpustate->TF = (f & 0x100) ? 1 : 0;
	cpustate->IF = (f & 0x200) ? 1 : 0;
	cpustate->DF = (f & 0x400) ? 1 : 0;
	cpustate->OF = (f & 0x800) ? 1 : 0;
	cpustate->IOP1 = (f & 0x1000) ? 1 : 0;
	cpustate->IOP2 = (f & 0x2000) ? 1 : 0;
	cpustate->NT = (f & 0x4000) ? 1 : 0;
	cpustate->eflags = f & cpustate->eflags_mask;
}

static void sib_byte(i386_state *cpustate,UINT8 mod, UINT32* out_ea, UINT8* out_segment)
{
	UINT32 ea = 0;
	UINT8 segment = 0;
	UINT8 scale, i, base;
	UINT8 sib = FETCH(cpustate);
	scale = (sib >> 6) & 0x3;
	i = (sib >> 3) & 0x7;
	base = sib & 0x7;

	switch( base )
	{
		case 0: ea = REG32(EAX); segment = DS; break;
		case 1: ea = REG32(ECX); segment = DS; break;
		case 2: ea = REG32(EDX); segment = DS; break;
		case 3: ea = REG32(EBX); segment = DS; break;
		case 4: ea = REG32(ESP); segment = SS; break;
		case 5:
			if( mod == 0 ) {
				ea = FETCH32(cpustate);
				segment = DS;
			} else if( mod == 1 ) {
				ea = REG32(EBP);
				segment = SS;
			} else if( mod == 2 ) {
				ea = REG32(EBP);
				segment = SS;
			}
			break;
		case 6: ea = REG32(ESI); segment = DS; break;
		case 7: ea = REG32(EDI); segment = DS; break;
	}
	switch( i )
	{
		case 0: ea += REG32(EAX) * (1 << scale); break;
		case 1: ea += REG32(ECX) * (1 << scale); break;
		case 2: ea += REG32(EDX) * (1 << scale); break;
		case 3: ea += REG32(EBX) * (1 << scale); break;
		case 4: break;
		case 5: ea += REG32(EBP) * (1 << scale); break;
		case 6: ea += REG32(ESI) * (1 << scale); break;
		case 7: ea += REG32(EDI) * (1 << scale); break;
	}
	*out_ea = ea;
	*out_segment = segment;
}

static void modrm_to_EA(i386_state *cpustate,UINT8 mod_rm, UINT32* out_ea, UINT8* out_segment)
{
	INT8 disp8;
	INT16 disp16;
	INT32 disp32;
	UINT8 mod = (mod_rm >> 6) & 0x3;
	UINT8 rm = mod_rm & 0x7;
	UINT32 ea;
	UINT8 segment;

	if( mod_rm >= 0xc0 )
		fatalerror("i386: Called modrm_to_EA with modrm value %02X !",mod_rm);

	if( cpustate->address_size ) {
		switch( rm )
		{
			default:
			case 0: ea = REG32(EAX); segment = DS; break;
			case 1: ea = REG32(ECX); segment = DS; break;
			case 2: ea = REG32(EDX); segment = DS; break;
			case 3: ea = REG32(EBX); segment = DS; break;
			case 4: sib_byte(cpustate, mod, &ea, &segment ); break;
			case 5:
				if( mod == 0 ) {
					ea = FETCH32(cpustate); segment = DS;
				} else {
					ea = REG32(EBP); segment = SS;
				}
				break;
			case 6: ea = REG32(ESI); segment = DS; break;
			case 7: ea = REG32(EDI); segment = DS; break;
		}
		if( mod == 1 ) {
			disp8 = FETCH(cpustate);
			ea += (INT32)disp8;
		} else if( mod == 2 ) {
			disp32 = FETCH32(cpustate);
			ea += disp32;
		}

		if( cpustate->segment_prefix )
			segment = cpustate->segment_override;

		*out_ea = ea;
		*out_segment = segment;

	} else {
		switch( rm )
		{
			default:
			case 0: ea = REG16(BX) + REG16(SI); segment = DS; break;
			case 1: ea = REG16(BX) + REG16(DI); segment = DS; break;
			case 2: ea = REG16(BP) + REG16(SI); segment = SS; break;
			case 3: ea = REG16(BP) + REG16(DI); segment = SS; break;
			case 4: ea = REG16(SI); segment = DS; break;
			case 5: ea = REG16(DI); segment = DS; break;
			case 6:
				if( mod == 0 ) {
					ea = FETCH16(cpustate); segment = DS;
				} else {
					ea = REG16(BP); segment = SS;
				}
				break;
			case 7: ea = REG16(BX); segment = DS; break;
		}
		if( mod == 1 ) {
			disp8 = FETCH(cpustate);
			ea += (INT32)disp8;
		} else if( mod == 2 ) {
			disp16 = FETCH16(cpustate);
			ea += (INT32)disp16;
		}

		if( cpustate->segment_prefix )
			segment = cpustate->segment_override;

		*out_ea = ea & 0xffff;
		*out_segment = segment;
	}
}

static UINT32 GetNonTranslatedEA(i386_state *cpustate,UINT8 modrm)
{
	UINT8 segment;
	UINT32 ea;
	modrm_to_EA(cpustate, modrm, &ea, &segment );
	return ea;
}

static UINT32 GetEA(i386_state *cpustate,UINT8 modrm)
{
	UINT8 segment;
	UINT32 ea;
	modrm_to_EA(cpustate, modrm, &ea, &segment );
	return i386_translate(cpustate, segment, ea );
}

/* Check segment register for validity when changing privilege level after an RETF */
static void i386_check_sreg_validity(i386_state* cpustate, int reg)
{
	UINT16 selector = cpustate->sreg[reg].selector;
	UINT8 CPL = cpustate->CPL;
	UINT8 DPL,RPL;
	I386_SREG desc;
	int invalid = 0;

	memset(&desc, 0, sizeof(desc));
	desc.selector = selector;
	i386_load_protected_mode_segment(cpustate,&desc);
	DPL = (desc.flags >> 5) & 0x03;  // descriptor privilege level
	RPL = selector & 0x03;

	/* Must be within the relevant descriptor table limits */
	if(selector & 0x04)
	{
		if((selector & ~0x07) > cpustate->ldtr.limit)
			invalid = 1;
	}
	else
	{
		if((selector & ~0x07) > cpustate->gdtr.limit)
			invalid = 1;
	}

	/* Must be either a data or readable code segment */
	if(((desc.flags & 0x0018) == 0x0018 && (desc.flags & 0x0002)) || (desc.flags & 0x0018) == 0x0010)
		invalid = 0;
	else
		invalid = 1;

	/* If a data segment or non-conforming code segment, then either DPL >= CPL or DPL >= RPL */
	if(((desc.flags & 0x0018) == 0x0018 && (desc.flags & 0x0004) == 0) || (desc.flags & 0x0018) == 0x0010)
	{
		if((DPL < CPL) || (DPL < RPL))
			invalid = 1;
	}

	/* if segment is invalid, then segment register is nulled */
	if(invalid != 0)
	{
		cpustate->sreg[reg].selector = 0;
		i386_load_segment_descriptor(cpustate,reg);
	}
}

static void i386_trap(i386_state *cpustate,int irq, int irq_gate, int trap_level)
{
	/*  I386 Interrupts/Traps/Faults:
     *
     *  0x00    Divide by zero
     *  0x01    Debug exception
     *  0x02    NMI
     *  0x03    Int3
     *  0x04    Overflow
     *  0x05    Array bounds check
     *  0x06    Illegal Opcode
     *  0x07    FPU not available
     *  0x08    Double fault
     *  0x09    Coprocessor segment overrun
     *  0x0a    Invalid task state
     *  0x0b    Segment not present
     *  0x0c    Stack exception
     *  0x0d    General Protection Fault
     *  0x0e    Page fault
     *  0x0f    Reserved
     *  0x10    Coprocessor error
     */
	UINT32 v1, v2;
	UINT32 offset;
	UINT16 segment;
	int entry = irq * (PROTECTED_MODE ? 8 : 4);
	int SetRPL = 0;

	if( !(PROTECTED_MODE) )
	{
		/* 16-bit */
		PUSH16(cpustate, get_flags(cpustate) & 0xffff );
		PUSH16(cpustate, cpustate->sreg[CS].selector );
		if(irq == 3 || irq == 4 || irq == 9 || irq_gate == 1)
			PUSH16(cpustate, cpustate->eip );
		else
			PUSH16(cpustate, cpustate->prev_eip );

		cpustate->sreg[CS].selector = READ16(cpustate, cpustate->idtr.base + entry + 2 );
		cpustate->eip = READ16(cpustate, cpustate->idtr.base + entry );

		cpustate->TF = 0;
		cpustate->IF = 0;
	}
	else
	{
		int type;
		UINT16 flags;
		I386_SREG desc;
		UINT8 CPL = 0, DPL = 0; //, RPL = 0;
		I386_CALL_GATE gate;

		/* 32-bit */
		v1 = READ32(cpustate, cpustate->idtr.base + entry );
		v2 = READ32(cpustate, cpustate->idtr.base + entry + 4 );
		offset = (v2 & 0xffff0000) | (v1 & 0xffff);
		segment = (v1 >> 16) & 0xffff;
		type = (v2>>8) & 0x1F;
		flags = (v2>>8) & 0xf0ff;

		if(trap_level == 2)
		{
			logerror("IRQ: Double fault.\n");
			FAULT_EXP(FAULT_DF,0);
		}
		if(trap_level >= 3)
		{
			logerror("IRQ: Triple fault. CPU reset.\n");
			device_set_input_line(cpustate->device, INPUT_LINE_RESET, PULSE_LINE);
			return;
		}

		// TODO: support for EXT bit
		/* segment privilege checks */
		if(entry > cpustate->idtr.limit)
		{
			logerror("IRQ: Vector is past IDT limit.\n");
			FAULT_EXP(FAULT_GP,entry+2)
		}
		/* segment must be interrupt gate, trap gate, or task gate */
		if(type != 0x05 && type != 0x06 && type != 0x07 && type != 0x0e && type != 0x0f)
		{
			logerror("IRQ: Vector segment is not an interrupt, trap or task gate.\n");
			FAULT_EXP(FAULT_GP,entry+2)
		}

		/* TODO: if software IRQ, then gate DPL must be less than CPL, else #GP(vector*8+2+EXT) */

		if((flags & 0x0080) == 0)
		{
			logerror("IRQ: Vector segment is not present.\n");
			FAULT_EXP(FAULT_NP,entry+2)
		}

		if(type == 0x05)
		{
			/* Task gate */
			memset(&gate, 0, sizeof(gate));
			gate.segment = segment;
			i386_load_call_gate(cpustate,&gate);
			memset(&desc, 0, sizeof(desc));
			desc.selector = gate.selector;
			i386_load_protected_mode_segment(cpustate,&desc);
			if(segment & 0x04)
			{
				logerror("IRQ: Task gate: TSS is not in the GDT.\n");
				FAULT_EXP(FAULT_TS,segment & ~0x07);
			}
			else
			{
				if(segment > cpustate->gdtr.limit)
				{
					logerror("IRQ: Task gate: TSS is past GDT limit.\n");
					FAULT_EXP(FAULT_TS,segment & ~0x07);
				}
			}
			if((desc.flags & 0x000f) != 0x09 && (desc.flags & 0x000f) != 0x01)
			{
				logerror("IRQ: Task gate: TSS is not an available TSS.\n");
				FAULT_EXP(FAULT_TS,segment & ~0x07);
			}
			if((desc.flags & 0x0080) == 0)
			{
				logerror("IRQ: Task gate: TSS is not present.\n");
				FAULT_EXP(FAULT_NP,segment & ~0x07);
			}
			if(desc.flags & 0x08)
				i386_task_switch(cpustate,desc.selector,0);
			else
				i286_task_switch(cpustate,desc.selector,0);
			return;
		}
		else
		{
			/* Interrupt or Trap gate */
			memset(&desc, 0, sizeof(desc));
			desc.selector = segment;
			i386_load_protected_mode_segment(cpustate,&desc);
			CPL = cpustate->CPL;  // current privilege level
			DPL = (desc.flags >> 5) & 0x03;  // descriptor privilege level
//          RPL = segment & 0x03;  // requested privilege level

			if((segment & ~0x07) == 0)
			{
				logerror("IRQ: Gate segment is null.\n");
				FAULT_EXP(FAULT_GP,0)
			}
			if(segment & 0x04)
			{
				if((segment & ~0x07) > cpustate->ldtr.limit)
				{
					logerror("IRQ: Gate segment is past LDT limit.\n");
					FAULT_EXP(FAULT_GP,segment)
				}
			}
			else
			{
				if((segment & ~0x07) > cpustate->gdtr.limit)
				{
					logerror("IRQ: Gate segment is past GDT limit.\n");
					FAULT_EXP(FAULT_GP,segment)
				}
			}
			if((desc.flags & 0x0018) != 0x18)
			{
				logerror("IRQ: Gate descriptor is not a code segment.\n");
				FAULT_EXP(FAULT_GP,segment)
			}
			if((desc.flags & 0x0080) == 0)
			{
				logerror("IRQ: Gate segment is not present.\n");
				FAULT_EXP(FAULT_NP,segment)
			}
			if((desc.flags & 0x0004) == 0 && (DPL < CPL))
			{
				/* IRQ to inner privilege */
				I386_SREG stack;
				UINT32 newESP,oldSS,oldESP;

				/* Check new stack segment in TSS */
				memset(&stack, 0, sizeof(stack));
				if(flags & 0x0008)
					stack.selector = i386_get_stack_segment(cpustate,DPL);
				else
					stack.selector = i286_get_stack_segment(cpustate,DPL);
				i386_load_protected_mode_segment(cpustate,&stack);
				oldSS = cpustate->sreg[SS].selector;
				if(flags & 0x0008)
					oldESP = REG32(ESP);
				else
					oldESP = REG16(SP);
				if((stack.selector & ~0x07) == 0)
				{
					logerror("IRQ: New stack selector is null.\n");
					FAULT_EXP(FAULT_GP,0)  // #GP(EXT)
				}
				if(stack.selector & 0x04)
				{
					if((stack.selector & ~0x07) > cpustate->ldtr.base)
					{
						logerror("IRQ: New stack selector is past LDT limit.\n");
						FAULT_EXP(FAULT_TS,stack.selector & ~0x07)
					}
				}
				else
				{
					if((stack.selector & ~0x07) > cpustate->gdtr.base)
					{
						logerror("IRQ: New stack selector is past GDT limit.\n");
						FAULT_EXP(FAULT_TS,stack.selector & ~0x07) // #TS(stack selector + EXT)
					}
				}
				if((stack.selector & 0x03) != DPL)
				{
					logerror("IRQ: New stack selector RPL is not equal to code segment DPL.\n");
					FAULT_EXP(FAULT_TS,stack.selector & ~0x07) // #TS(stack selector + EXT)
				}
				if(((stack.flags >> 5) & 0x03) != DPL)
				{
					logerror("IRQ: New stack segment DPL is not equal to code segment DPL.\n");
					FAULT_EXP(FAULT_TS,stack.selector & ~0x07) // #TS(stack selector + EXT)
				}
				if(((stack.flags & 0x0018) != 0x10) && (stack.flags & 0x0002) != 0)
				{
					logerror("IRQ: New stack segment is not a writable data segment.\n");
					FAULT_EXP(FAULT_TS,stack.selector & ~0x07) // #TS(stack selector + EXT)
				}
				if((stack.flags & 0x0080) == 0)
				{
					logerror("IRQ: New stack segment is not present.\n");
					FAULT_EXP(FAULT_SS,stack.selector & ~0x07) // #TS(stack selector + EXT)
				}
				if(type & 0x08) // 32-bit gate
				{
					newESP = i386_get_stack_ptr(cpustate,DPL);
					if(newESP < 20)
					{
						logerror("IRQ: New stack has no space for return addresses.\n");
						FAULT_EXP(FAULT_SS,0)
					}
				}
				else // 16-bit gate
				{
					newESP = i286_get_stack_ptr(cpustate,DPL);
					if(newESP < 10)
					{
						logerror("IRQ: New stack has no space for return addresses.\n");
						FAULT_EXP(FAULT_SS,0)
					}
				}
				if(offset > desc.limit)
				{
					logerror("IRQ: New EIP is past code segment limit.\n");
					FAULT_EXP(FAULT_GP,0)
				}
				/* Load new stack segment descriptor */
				cpustate->sreg[SS].selector = stack.selector;
				i386_load_segment_descriptor(cpustate,SS);
				if(flags & 0x0008)
					REG32(ESP) = i386_get_stack_ptr(cpustate,DPL);
				else
					REG16(SP) = i286_get_stack_ptr(cpustate,DPL);
				if(type & 0x08)
				{
					// 32-bit gate
					PUSH32(cpustate,oldSS);
					PUSH32(cpustate,oldESP);
				}
				else
				{
					// 16-bit gate
					PUSH16(cpustate,oldSS);
					PUSH16(cpustate,oldESP);
				}
				cpustate->CPL = DPL;
				SetRPL = 1;
			}
			else
			{
				int stack_limit;
				if((desc.flags & 0x0004) || (DPL == CPL))
				{
					/* IRQ to same privilege */
					if(type == 0x0e || type == 0x0f)  // 32-bit gate
						stack_limit = 10;
					else
						stack_limit = 6;
					// TODO: Add check for error code (2 extra bytes)
					if(REG32(ESP) < stack_limit)
					{
						logerror("IRQ: Stack has no space left (needs %i bytes).\n",stack_limit);
						FAULT_EXP(FAULT_SS,0)
					}
					if(offset > desc.limit)
					{
						logerror("IRQ: Gate segment offset is past segment limit.\n");
						FAULT_EXP(FAULT_GP,0)
					}
					SetRPL = 1;
				}
				else
				{
					logerror("IRQ: Gate descriptor is non-conforming, and DPL does not equal CPL.\n");
					FAULT_EXP(FAULT_GP,segment)
				}
			}
		}

		if(type != 0x0e && type != 0x0f)  // if not 386 interrupt or trap gate
		{
			PUSH16(cpustate, get_flags(cpustate) & 0xffff );
			PUSH16(cpustate, cpustate->sreg[CS].selector );
			if(irq == 3 || irq == 4 || irq == 9 || irq_gate == 1)
				PUSH16(cpustate, cpustate->eip );
			else
				PUSH16(cpustate, cpustate->prev_eip );
		}
		else
		{
			PUSH32(cpustate, get_flags(cpustate) & 0x00fcffff );
			PUSH32(cpustate, cpustate->sreg[CS].selector );
			if(irq == 3 || irq == 4 || irq == 9 || irq_gate == 1)
				PUSH32(cpustate, cpustate->eip );
			else
				PUSH32(cpustate, cpustate->prev_eip );
		}
		if(SetRPL != 0)
			segment = (segment & ~0x03) | cpustate->CPL;
		cpustate->sreg[CS].selector = segment;
		cpustate->eip = offset;

		if(type == 0x0e || type == 0x06)
			cpustate->IF = 0;
		cpustate->TF = 0;
		cpustate->NT = 0;
	}

	i386_load_segment_descriptor(cpustate,CS);
	CHANGE_PC(cpustate,cpustate->eip);

}

static void i386_trap_with_error(i386_state *cpustate,int irq, int irq_gate, int trap_level, UINT32 error)
{
	i386_trap(cpustate,irq,irq_gate,trap_level);
	if(irq == 8 || irq == 10 || irq == 11 || irq == 12 || irq == 13 || irq == 14)
	{
		// for these exceptions, an error code is pushed onto the stack by the processor.
		// no error code is pushed for software interrupts, either.
		PUSH32(cpustate,error);
	}
}


static void i286_task_switch(i386_state *cpustate, UINT16 selector, UINT8 nested)
{
	UINT32 tss;
	I386_SREG seg;
	UINT16 old_task;
	UINT8 ar_byte;  // access rights byte

	/* TODO: Task State Segment privilege checks */

	/* For tasks that aren't nested, clear the busy bit in the task's descriptor */
	if(nested == 0)
	{
		if(cpustate->task.segment & 0x0004)
		{
			ar_byte = READ8(cpustate,cpustate->ldtr.base + (cpustate->task.segment & ~0x0007) + 5);
			WRITE8(cpustate,cpustate->ldtr.base + (cpustate->task.segment & ~0x0007) + 5,ar_byte & ~0x02);
		}
		else
		{
			ar_byte = READ8(cpustate,cpustate->gdtr.base + (cpustate->task.segment & ~0x0007) + 5);
			WRITE8(cpustate,cpustate->gdtr.base + (cpustate->task.segment & ~0x0007) + 5,ar_byte & ~0x02);
		}
	}

	/* Save the state of the current task in the current TSS (TR register base) */
	tss = cpustate->task.base;
	WRITE16(cpustate,tss+0x0e,cpustate->eip & 0x0000ffff);
	WRITE16(cpustate,tss+0x10,get_flags(cpustate) & 0x0000ffff);
	WRITE16(cpustate,tss+0x12,REG16(AX));
	WRITE16(cpustate,tss+0x14,REG16(CX));
	WRITE16(cpustate,tss+0x16,REG16(DX));
	WRITE16(cpustate,tss+0x18,REG16(BX));
	WRITE16(cpustate,tss+0x1a,REG16(SP));
	WRITE16(cpustate,tss+0x1c,REG16(BP));
	WRITE16(cpustate,tss+0x1e,REG16(SI));
	WRITE16(cpustate,tss+0x20,REG16(DI));
	WRITE16(cpustate,tss+0x22,cpustate->sreg[ES].selector);
	WRITE16(cpustate,tss+0x24,cpustate->sreg[CS].selector);
	WRITE16(cpustate,tss+0x26,cpustate->sreg[SS].selector);
	WRITE16(cpustate,tss+0x28,cpustate->sreg[DS].selector);

	old_task = cpustate->task.segment;

	/* Load task register with the selector of the incoming task */
	cpustate->task.segment = selector;
	memset(&seg, 0, sizeof(seg));
	seg.selector = cpustate->task.segment;
	i386_load_protected_mode_segment(cpustate,&seg);
	cpustate->task.limit = seg.limit;
	cpustate->task.base = seg.base;
	cpustate->task.flags = seg.flags;

	/* Set TS bit in CR0 */
	cpustate->cr[0] |= 0x08;

	/* Load incoming task state from the new task's TSS */
	tss = cpustate->task.base;
	cpustate->ldtr.segment = READ16(cpustate,tss+0x2a) & 0xffff;
	seg.selector = cpustate->ldtr.segment;
	i386_load_protected_mode_segment(cpustate,&seg);
	cpustate->ldtr.limit = seg.limit;
	cpustate->ldtr.base = seg.base;
	cpustate->ldtr.flags = seg.flags;
	cpustate->eip = READ16(cpustate,tss+0x0e);
	set_flags(cpustate,READ16(cpustate,tss+0x10));
	REG16(AX) = READ16(cpustate,tss+0x12);
	REG16(CX) = READ16(cpustate,tss+0x14);
	REG16(DX) = READ16(cpustate,tss+0x16);
	REG16(BX) = READ16(cpustate,tss+0x18);
	REG16(SP) = READ16(cpustate,tss+0x1a);
	REG16(BP) = READ16(cpustate,tss+0x1c);
	REG16(SI) = READ16(cpustate,tss+0x1e);
	REG16(DI) = READ16(cpustate,tss+0x20);
	cpustate->sreg[ES].selector = READ16(cpustate,tss+0x22) & 0xffff;
	i386_load_segment_descriptor(cpustate, ES);
	cpustate->sreg[CS].selector = READ16(cpustate,tss+0x24) & 0xffff;
	i386_load_segment_descriptor(cpustate, CS);
	cpustate->sreg[SS].selector = READ16(cpustate,tss+0x26) & 0xffff;
	i386_load_segment_descriptor(cpustate, SS);
	cpustate->sreg[DS].selector = READ16(cpustate,tss+0x28) & 0xffff;
	i386_load_segment_descriptor(cpustate, DS);

	/* Set the busy bit in the new task's descriptor */
	if(selector & 0x0004)
	{
		ar_byte = READ8(cpustate,cpustate->ldtr.base + (selector & ~0x0007) + 5);
		WRITE8(cpustate,cpustate->ldtr.base + (selector & ~0x0007) + 5,ar_byte | 0x02);
	}
	else
	{
		ar_byte = READ8(cpustate,cpustate->gdtr.base + (selector & ~0x0007) + 5);
		WRITE8(cpustate,cpustate->gdtr.base + (selector & ~0x0007) + 5,ar_byte | 0x02);
	}

	/* For nested tasks, we write the outgoing task's selector to the back-link field of the new TSS,
       and set the NT flag in the EFLAGS register */
	if(nested != 0)
	{
		WRITE16(cpustate,tss+0,old_task);
		cpustate->NT = 1;
	}
	CHANGE_PC(cpustate,cpustate->eip);

	cpustate->CPL = cpustate->sreg[CS].selector & 0x03;
	printf("286 Task Switch from selector %04x to %04x\n",old_task,selector);
}

static void i386_task_switch(i386_state *cpustate, UINT16 selector, UINT8 nested)
{
	UINT32 tss;
	I386_SREG seg;
	UINT16 old_task;
	UINT8 ar_byte;  // access rights byte

	/* TODO: Task State Segment privilege checks */

	/* For tasks that aren't nested, clear the busy bit in the task's descriptor */
	if(nested == 0)
	{
		if(cpustate->task.segment & 0x0004)
		{
			ar_byte = READ8(cpustate,cpustate->ldtr.base + (cpustate->task.segment & ~0x0007) + 5);
			WRITE8(cpustate,cpustate->ldtr.base + (cpustate->task.segment & ~0x0007) + 5,ar_byte & ~0x02);
		}
		else
		{
			ar_byte = READ8(cpustate,cpustate->gdtr.base + (cpustate->task.segment & ~0x0007) + 5);
			WRITE8(cpustate,cpustate->gdtr.base + (cpustate->task.segment & ~0x0007) + 5,ar_byte & ~0x02);
		}
	}

	/* Save the state of the current task in the current TSS (TR register base) */
	tss = cpustate->task.base;
	WRITE32(cpustate,tss+0x1c,cpustate->cr[3]);  // correct?
	WRITE32(cpustate,tss+0x20,cpustate->eip);
	WRITE32(cpustate,tss+0x24,get_flags(cpustate));
	WRITE32(cpustate,tss+0x28,REG32(EAX));
	WRITE32(cpustate,tss+0x2c,REG32(ECX));
	WRITE32(cpustate,tss+0x30,REG32(EDX));
	WRITE32(cpustate,tss+0x34,REG32(EBX));
	WRITE32(cpustate,tss+0x38,REG32(ESP));
	WRITE32(cpustate,tss+0x3c,REG32(EBP));
	WRITE32(cpustate,tss+0x40,REG32(ESI));
	WRITE32(cpustate,tss+0x44,REG32(EDI));
	WRITE32(cpustate,tss+0x48,cpustate->sreg[ES].selector);
	WRITE32(cpustate,tss+0x4c,cpustate->sreg[CS].selector);
	WRITE32(cpustate,tss+0x50,cpustate->sreg[SS].selector);
	WRITE32(cpustate,tss+0x54,cpustate->sreg[DS].selector);
	WRITE32(cpustate,tss+0x58,cpustate->sreg[FS].selector);
	WRITE32(cpustate,tss+0x5c,cpustate->sreg[GS].selector);

	old_task = cpustate->task.segment;

	/* Load task register with the selector of the incoming task */
	cpustate->task.segment = selector;
	memset(&seg, 0, sizeof(seg));
	seg.selector = cpustate->task.segment;
	i386_load_protected_mode_segment(cpustate,&seg);
	cpustate->task.limit = seg.limit;
	cpustate->task.base = seg.base;
	cpustate->task.flags = seg.flags;

	/* Set TS bit in CR0 */
	cpustate->cr[0] |= 0x08;

	/* Load incoming task state from the new task's TSS */
	tss = cpustate->task.base;
	cpustate->ldtr.segment = READ32(cpustate,tss+0x60) & 0xffff;
	seg.selector = cpustate->ldtr.segment;
	i386_load_protected_mode_segment(cpustate,&seg);
	cpustate->ldtr.limit = seg.limit;
	cpustate->ldtr.base = seg.base;
	cpustate->ldtr.flags = seg.flags;
	cpustate->cr[3] = READ32(cpustate,tss+0x1c);  // CR3 (PDBR)
	cpustate->eip = READ32(cpustate,tss+0x20);
	set_flags(cpustate,READ32(cpustate,tss+0x24));
	REG32(EAX) = READ32(cpustate,tss+0x28);
	REG32(ECX) = READ32(cpustate,tss+0x2c);
	REG32(EDX) = READ32(cpustate,tss+0x30);
	REG32(EBX) = READ32(cpustate,tss+0x34);
	REG32(ESP) = READ32(cpustate,tss+0x38);
	REG32(EBP) = READ32(cpustate,tss+0x3c);
	REG32(ESI) = READ32(cpustate,tss+0x40);
	REG32(EDI) = READ32(cpustate,tss+0x44);
	cpustate->sreg[ES].selector = READ32(cpustate,tss+0x48) & 0xffff;
	i386_load_segment_descriptor(cpustate, ES);
	cpustate->sreg[CS].selector = READ32(cpustate,tss+0x4c) & 0xffff;
	i386_load_segment_descriptor(cpustate, CS);
	cpustate->sreg[SS].selector = READ32(cpustate,tss+0x50) & 0xffff;
	i386_load_segment_descriptor(cpustate, SS);
	cpustate->sreg[DS].selector = READ32(cpustate,tss+0x54) & 0xffff;
	i386_load_segment_descriptor(cpustate, DS);
	cpustate->sreg[FS].selector = READ32(cpustate,tss+0x58) & 0xffff;
	i386_load_segment_descriptor(cpustate, FS);
	cpustate->sreg[GS].selector = READ32(cpustate,tss+0x5c) & 0xffff;
	i386_load_segment_descriptor(cpustate, GS);

	/* Set the busy bit in the new task's descriptor */
	if(selector & 0x0004)
	{
		ar_byte = READ8(cpustate,cpustate->ldtr.base + (selector & ~0x0007) + 5);
		WRITE8(cpustate,cpustate->ldtr.base + (selector & ~0x0007) + 5,ar_byte | 0x02);
	}
	else
	{
		ar_byte = READ8(cpustate,cpustate->gdtr.base + (selector & ~0x0007) + 5);
		WRITE8(cpustate,cpustate->gdtr.base + (selector & ~0x0007) + 5,ar_byte | 0x02);
	}

	/* For nested tasks, we write the outgoing task's selector to the back-link field of the new TSS,
       and set the NT flag in the EFLAGS register */
	if(nested != 0)
	{
		WRITE32(cpustate,tss+0,old_task);
		cpustate->NT = 1;
	}
	CHANGE_PC(cpustate,cpustate->eip);

	cpustate->CPL = cpustate->sreg[CS].selector & 0x03;
	printf("386 Task Switch from selector %04x to %04x\n",old_task,selector);
}

static void i386_check_irq_line(i386_state *cpustate)
{
	/* Check if the interrupts are enabled */
	if ( (cpustate->irq_state) && cpustate->IF )
	{
		cpustate->cycles -= 2;
		i386_trap(cpustate,cpustate->irq_callback(cpustate->device, 0), 1, 0);
	}
}

static void i386_protected_mode_jump(i386_state *cpustate, UINT16 seg, UINT32 off, int indirect, int operand32)
{
	I386_SREG desc;
	I386_CALL_GATE call_gate;
	UINT8 CPL,DPL,RPL;
	UINT8 SetRPL = 0;
	UINT16 segment = seg;
	UINT32 offset = off;

	/* Check selector is not null */
	if((segment & ~0x07) == 0)
	{
		logerror("JMP: Segment is null.\n");
		FAULT(FAULT_GP,0)
	}
	/* Selector is within descriptor table limit */
	if((segment & 0x04) == 0)
	{
		/* check GDT limit */
		if((segment & ~0x07) > (cpustate->gdtr.limit))
		{
			logerror("JMP: Segment is past GDT limit.\n");
			FAULT(FAULT_GP,segment & 0xfffc)
		}
	}
	else
	{
		/* check LDT limit */
		if((segment & ~0x07) > (cpustate->ldtr.limit))
		{
			logerror("JMP: Segment is past LDT limit.\n");
			FAULT(FAULT_GP,segment & 0xfffc)
		}
	}
	/* Determine segment type */
	memset(&desc, 0, sizeof(desc));
	desc.selector = segment;
	i386_load_protected_mode_segment(cpustate,&desc);
	CPL = cpustate->CPL;  // current privilege level
	DPL = (desc.flags >> 5) & 0x03;  // descriptor privilege level
	RPL = segment & 0x03;  // requested privilege level
	if((desc.flags & 0x0018) == 0x0018)
	{
		/* code segment */
		if((desc.flags & 0x0004) == 0)
		{
			/* non-conforming */
			SetRPL = 1;
			if(RPL > CPL)
			{
				logerror("JMP: RPL %i is less than CPL %i\n",RPL,CPL);
				FAULT(FAULT_GP,segment & 0xfffc)
			}
			if(DPL != CPL)
			{
				logerror("JMP: DPL %i is not equal CPL %i\n",DPL,CPL);
				FAULT(FAULT_GP,segment & 0xfffc)
			}
		}
		else
		{
			/* conforming */
			if(DPL > CPL)
			{
				logerror("JMP: DPL %i is less than CPL %i\n",DPL,CPL);
				FAULT(FAULT_GP,segment & 0xfffc)
			}
		}
		if((desc.flags & 0x0080) == 0)
		{
			logerror("JMP: Segment is not present\n");
			FAULT(FAULT_NP,segment & 0xfffc)
		}
		if(offset > desc.limit)
		{
			logerror("JMP: Offset is past segment limit\n");
			FAULT(FAULT_GP,0)
		}
	}
	else
	{
		if((desc.flags & 0x0010) != 0)
		{
			logerror("JMP: Segment is a data segment\n");
			FAULT(FAULT_GP,segment & 0xfffc)  // #GP (cannot execute code in a data segment)
		}
		else
		{
			switch(desc.flags & 0x000f)
			{
			case 0x01:  // 286 Available TSS
			case 0x09:  // 386 Available TSS
				logerror("JMP: Available 386 TSS at %08x\n",cpustate->pc);
				memset(&desc, 0, sizeof(desc));
				desc.selector = segment;
				i386_load_protected_mode_segment(cpustate,&desc);
				DPL = (desc.flags >> 5) & 0x03;  // descriptor privilege level
				if(DPL < CPL)
				{
					logerror("JMP: TSS: DPL %i is less than CPL %i\n",DPL,CPL);
					FAULT(FAULT_GP,segment & 0xfffc)
				}
				if(DPL < RPL)
				{
					logerror("JMP: TSS: DPL %i is less than TSS RPL %i\n",DPL,RPL);
					FAULT(FAULT_GP,segment & 0xfffc)
				}
				if((desc.flags & 0x0080) == 0)
				{
					logerror("JMP: TSS: Segment is not present\n");
					FAULT(FAULT_GP,segment & 0xfffc)
				}
				if(desc.flags & 0x0008)
					i386_task_switch(cpustate,desc.selector,0);
				else
					i286_task_switch(cpustate,desc.selector,0);
				return;
				break;
			case 0x04:  // 286 Call Gate
			case 0x0c:  // 386 Call Gate
				logerror("JMP: Call gate at %08x\n",cpustate->pc);
				SetRPL = 1;
				memset(&call_gate, 0, sizeof(call_gate));
				call_gate.segment = segment;
				i386_load_call_gate(cpustate,&call_gate);
				DPL = call_gate.dpl;
				if(DPL < CPL)
				{
					logerror("JMP: Call Gate: DPL %i is less than CPL %i\n",DPL,CPL);
					FAULT(FAULT_GP,segment & 0xfffc)
				}
				if(DPL < RPL)
				{
					logerror("JMP: Call Gate: DPL %i is less than RPL %i\n",DPL,RPL);
					FAULT(FAULT_GP,segment & 0xfffc)
				}
				if((desc.flags & 0x0080) == 0)
				{
					logerror("JMP: Call Gate: Segment is not present\n");
					FAULT(FAULT_NP,segment & 0xfffc)
				}
				/* Now we examine the segment that the call gate refers to */
				if(call_gate.selector == 0)
				{
					logerror("JMP: Call Gate: Gate selector is null\n");
					FAULT(FAULT_GP,0)
				}
				if(call_gate.selector & 0x04)
				{
					/* check GDT limit */
					if((call_gate.selector & ~0x07) > cpustate->gdtr.limit)
					{
						logerror("JMP: Call Gate: Gate Selector is past GDT segment limit\n");
						FAULT(FAULT_GP,call_gate.selector & 0xfffc)
					}
				}
				else
				{
					/* check LDT limit */
					if((call_gate.selector & ~0x07) > cpustate->ldtr.limit)
					{
						logerror("JMP: Call Gate: Gate Selector is past LDT segment limit\n");
						FAULT(FAULT_GP,call_gate.selector & 0xfffc)
					}
				}
				desc.selector = call_gate.selector;
				i386_load_protected_mode_segment(cpustate,&desc);
				DPL = (desc.flags >> 5) & 0x03;
				if((desc.flags & 0x0018) != 0x18)
				{
					logerror("JMP: Call Gate: Gate does not point to a code segment\n");
					FAULT(FAULT_GP,call_gate.selector & 0xfffc)
				}
				if((desc.flags & 0x0004) == 0)
				{  // non-conforming
					if(DPL != CPL)
					{
						logerror("JMP: Call Gate: Gate DPL does not equal CPL\n");
						FAULT(FAULT_GP,call_gate.selector & 0xfffc)
					}
				}
				else
				{  // conforming
					if(DPL > CPL)
					{
						logerror("JMP: Call Gate: Gate DPL is greater than CPL\n");
						FAULT(FAULT_GP,call_gate.selector & 0xfffc)
					}
				}
				if((desc.flags & 0x0080) == 0)
				{
					logerror("JMP: Call Gate: Gate Segment is not present\n");
					FAULT(FAULT_NP,call_gate.selector & 0xfffc)
				}
				if(call_gate.offset > desc.limit)
				{
					logerror("JMP: Call Gate: Gate offset is past Gate segment limit\n");
					FAULT(FAULT_GP,call_gate.selector & 0xfffc)
				}
				segment = call_gate.selector;
				offset = call_gate.offset;
				break;
			case 0x05:  // Task Gate
				logerror("JMP: Task gate at %08x\n",cpustate->pc);
				memset(&call_gate, 0, sizeof(call_gate));
				call_gate.segment = segment;
				i386_load_call_gate(cpustate,&call_gate);
				DPL = call_gate.dpl;
				if(DPL < CPL)
				{
					logerror("JMP: Task Gate: Gate DPL %i is less than CPL %i\n",DPL,CPL);
					FAULT(FAULT_GP,segment & 0xfffc)
				}
				if(DPL < RPL)
				{
					logerror("JMP: Task Gate: Gate DPL %i is less than CPL %i\n",DPL,CPL);
					FAULT(FAULT_GP,segment & 0xfffc)
				}
				if(call_gate.present == 0)
				{
					logerror("JMP: Task Gate: Gate is not present.\n");
					FAULT(FAULT_GP,segment & 0xfffc)
				}
				/* Check the TSS that the task gate points to */
				desc.selector = call_gate.selector;
				i386_load_protected_mode_segment(cpustate,&desc);
				DPL = (desc.flags >> 5) & 0x03;  // descriptor privilege level
				RPL = call_gate.selector & 0x03;  // requested privilege level
				if(call_gate.selector & 0x04)
				{
					logerror("JMP: Task Gate TSS: TSS must be global.\n");
					FAULT(FAULT_GP,call_gate.selector & 0xfffc)
				}
				else
				{
					if((call_gate.selector & ~0x07) > cpustate->gdtr.limit)
					{
						logerror("JMP: Task Gate TSS: TSS is past GDT limit.\n");
						FAULT(FAULT_GP,call_gate.selector & 0xfffc)
					}
				}
				if((call_gate.ar & 0x000f) == 0x0009 || (call_gate.ar & 0x000f) == 0x0001)
				{
					logerror("JMP: Task Gate TSS: Segment is not an available TSS.\n");
					FAULT(FAULT_GP,call_gate.selector & 0xfffc)
				}
				if(call_gate.present == 0)
				{
					logerror("JMP: Task Gate TSS: TSS is not present.\n");
					FAULT(FAULT_NP,call_gate.selector & 0xfffc)
				}
				if(call_gate.ar & 0x08)
					i386_task_switch(cpustate,call_gate.selector,0);
				else
					i286_task_switch(cpustate,call_gate.selector,0);
				return;
				break;
			default:  // invalid segment type
				logerror("JMP: Invalid segment type (%i) to jump to.\n",desc.flags & 0x000f);
				FAULT(FAULT_GP,segment & 0xfffc)
			}
		}
	}

	if(SetRPL != 0)
		segment = (segment & ~0x03) | cpustate->CPL;
	if(operand32 == 0)
		cpustate->eip = offset & 0x0000ffff;
	else
		cpustate->eip = offset;
	cpustate->sreg[CS].selector = segment;
	cpustate->performed_intersegment_jump = 1;
	i386_load_segment_descriptor(cpustate,CS);
	CHANGE_PC(cpustate,cpustate->eip);
}

static void i386_protected_mode_call(i386_state *cpustate, UINT16 seg, UINT32 off, int indirect, int operand32)
{
	I386_SREG desc;
	I386_CALL_GATE gate;
	UINT8 SetRPL = 0;
	UINT8 CPL, DPL, RPL;
	UINT16 selector = seg;
	UINT32 offset = off;
	int x;

	if((selector & ~0x07) == 0)
	{
		logerror("CALL: Selector is null.\n");
		FAULT(FAULT_GP,0)  // #GP(0)
	}
	if(selector & 0x04)
	{
		if((selector & ~0x07) > cpustate->ldtr.limit)
		{
			logerror("CALL: Selector is past LDT limit.\n");
			FAULT(FAULT_GP,selector & ~0x07)  // #GP(selector)
		}
	}
	else
	{
		if((selector & ~0x07) > cpustate->gdtr.limit)
		{
			logerror("CALL: Selector is past GDT limit.\n");
			FAULT(FAULT_GP,selector & ~0x07)  // #GP(selector)
		}
	}

	/* Determine segment type */
	memset(&desc, 0, sizeof(desc));
	desc.selector = selector;
	i386_load_protected_mode_segment(cpustate,&desc);
	CPL = cpustate->CPL;  // current privilege level
	DPL = (desc.flags >> 5) & 0x03;  // descriptor privilege level
	RPL = selector & 0x03;  // requested privilege level
	if((desc.flags & 0x0018) == 0x18)  // is a code segment
	{
		if(desc.flags & 0x0004)
		{
			/* conforming */
			if(DPL > CPL)
			{
				logerror("CALL: Code segment DPL %i is greater than CPL %i\n",DPL,CPL);
				FAULT(FAULT_GP,selector & ~0x07)  // #GP(selector)
			}
		}
		else
		{
			/* non-conforming */
			if(RPL > CPL)
			{
				logerror("CALL: RPL %i is greater than CPL %i\n",RPL,CPL);
				FAULT(FAULT_GP,selector & ~0x07)  // #GP(selector)
			}
			if(DPL != CPL)
			{
				logerror("CALL: Code segment DPL %i is not equal to CPL %i\n",DPL,CPL);
				FAULT(FAULT_GP,selector & ~0x07)  // #GP(selector)
			}
			SetRPL = 1;
		}
		if((desc.flags & 0x0080) == 0)
		{
			logerror("CALL: Code segment is not present.\n");
			FAULT(FAULT_NP,selector & ~0x07)  // #NP(selector)
		}
		if (operand32 != 0)  // if 32-bit
		{
			if(REG32(ESP) < 8)
			{
				logerror("CALL: Stack has no room for return address.\n");
				FAULT(FAULT_SS,0)  // #SS(0)
			}
		}
		else
		{
			if(REG16(SP) < 4)
			{
				logerror("CALL: Stack has no room for return address.\n");
				FAULT(FAULT_SS,0)  // #SS(0)
			}
		}
		if(offset > desc.limit)
		{
			logerror("CALL: EIP is past segment limit.\n");
			FAULT(FAULT_GP,0)  // #GP(0)
		}
	}
	else
	{
		/* special segment type */
		if(desc.flags & 0x0010)
		{
			logerror("CALL: Segment is a data segment.\n");
			FAULT(FAULT_GP,desc.selector & ~0x07)  // #GP(selector)
		}
		else
		{
			switch(desc.flags & 0x000f)
			{
			case 0x01:  // Available 286 TSS
			case 0x09:  // Available 386 TSS
				logerror("CALL: Available TSS at %08x\n",cpustate->pc);
				if(DPL < CPL)
				{
					logerror("CALL: TSS: DPL is less than CPL.\n");
					FAULT(FAULT_TS,selector & ~0x07) // #TS(selector)
				}
				if(DPL < RPL)
				{
					logerror("CALL: TSS: DPL is less than RPL.\n");
					FAULT(FAULT_TS,selector & ~0x07) // #TS(selector)
				}
				if(desc.flags & 0x0002)
				{
					logerror("CALL: TSS: TSS is busy.\n");
					FAULT(FAULT_TS,selector & ~0x07) // #TS(selector)
				}
				if(desc.flags & 0x0080)
				{
					logerror("CALL: TSS: Segment is not present.\n");
					FAULT(FAULT_NP,selector & ~0x07) // #NP(selector)
				}
				if(desc.flags & 0x08)
					i386_task_switch(cpustate,desc.selector,1);
				else
					i286_task_switch(cpustate,desc.selector,1);
				return;
				break;
			case 0x04:  // 286 call gate
			case 0x0c:  // 386 call gate
				if((desc.flags & 0x000f) == 0x04)
					operand32 = 0;
				else
					operand32 = 1;
				memset(&gate, 0, sizeof(gate));
				gate.segment = selector;
				i386_load_call_gate(cpustate,&gate);
				DPL = gate.dpl;
				logerror("CALL: Call gate at %08x (%i parameters)\n",cpustate->pc,gate.dword_count);
				if(DPL < CPL)
				{
					logerror("CALL: Call gate DPL %i is less than CPL %i.\n",DPL,CPL);
					FAULT(FAULT_GP,desc.selector & ~0x07)  // #GP(selector)
				}
				if(DPL < RPL)
				{
					logerror("CALL: Call gate DPL %i is less than RPL %i.\n",DPL,RPL);
					FAULT(FAULT_GP,desc.selector & ~0x07)  // #GP(selector)
				}
				if(gate.present == 0)
				{
					logerror("CALL: Call gate is not present.\n");
					FAULT(FAULT_NP,desc.selector & ~0x07)  // #GP(selector)
				}
				desc.selector = gate.selector;
				if((gate.selector & ~0x07) == 0)
				{
					logerror("CALL: Call gate: Segment is null.\n");
					FAULT(FAULT_GP,0)  // #GP(0)
				}
				if(desc.selector & 0x04)
				{
					if((desc.selector & ~0x07) > cpustate->ldtr.limit)
					{
						logerror("CALL: Call gate: Segment is past LDT limit\n");
						FAULT(FAULT_GP,desc.selector & ~0x07)  // #GP(selector)
					}
				}
				else
				{
					if((desc.selector & ~0x07) > cpustate->gdtr.limit)
					{
						logerror("CALL: Call gate: Segment is past GDT limit\n");
						FAULT(FAULT_GP,desc.selector & ~0x07)  // #GP(selector)
					}
				}
				i386_load_protected_mode_segment(cpustate,&desc);
				if((desc.flags & 0x0018) != 0x18)
				{
					logerror("CALL: Call gate: Segment is not a code segment.\n");
					FAULT(FAULT_GP,desc.selector & ~0x07)  // #GP(selector)
				}
				DPL = ((desc.flags >> 5) & 0x03);
				if(DPL > CPL)
				{
					logerror("CALL: Call gate: Segment DPL %i is greater than CPL %i.\n",DPL,CPL);
					FAULT(FAULT_GP,desc.selector & ~0x07)  // #GP(selector)
				}
				if(DPL < CPL && (desc.flags & 0x0004) == 0)
				{
					I386_SREG stack;
					I386_SREG temp;
					UINT32 oldSS,oldESP;
					/* more privilege */
					/* Check new SS segment for privilege level from TSS */
					memset(&stack, 0, sizeof(stack));
					if(operand32 != 0)
						stack.selector = i386_get_stack_segment(cpustate,DPL);
					else
						stack.selector = i286_get_stack_segment(cpustate,DPL);
					i386_load_protected_mode_segment(cpustate,&stack);
					if((stack.selector & ~0x07) == 0)
					{
						logerror("CALL: Call gate: TSS selector is null\n");
						FAULT(FAULT_TS,0)  // #TS(0)
					}
					if(stack.selector & 0x04)
					{
						if((stack.selector & ~0x07) > cpustate->ldtr.limit)
						{
							logerror("CALL: Call gate: TSS selector is past LDT limit\n");
							FAULT(FAULT_TS,stack.selector)  // #TS(SS selector)
						}
					}
					else
					{
						if((stack.selector & ~0x07) > cpustate->gdtr.limit)
						{
							logerror("CALL: Call gate: TSS selector is past GDT limit\n");
							FAULT(FAULT_TS,stack.selector)  // #TS(SS selector)
						}
					}
					if((stack.selector & 0x03) != DPL)
					{
						logerror("CALL: Call gate: Stack selector RPL does not equal code segment DPL %i\n",DPL);
						FAULT(FAULT_TS,stack.selector)  // #TS(SS selector)
					}
					if(((stack.flags >> 5) & 0x03) != DPL)
					{
						logerror("CALL: Call gate: Stack DPL does not equal code segment DPL %i\n",DPL);
						FAULT(FAULT_TS,stack.selector)  // #TS(SS selector)
					}
					if((stack.flags & 0x0018) != 0x10 && (stack.flags & 0x0002))
					{
						logerror("CALL: Call gate: Stack segment is not a writable data segment\n");
						FAULT(FAULT_TS,stack.selector)  // #TS(SS selector)
					}
					if((stack.flags & 0x0080) == 0)
					{
						logerror("CALL: Call gate: Stack segment is not a writable data segment\n");
						FAULT(FAULT_SS,stack.selector)  // #SS(SS selector)
					}
					if(operand32 != 0)
					{
						UINT32 newESP = i386_get_stack_ptr(cpustate,DPL);
						if(newESP < ((gate.dword_count & 0x1f) + 16))
						{
							logerror("CALL: Call gate: New stack has no room for 32-bit return address and parameters.\n");
							FAULT(FAULT_SS,0) // #SS(0)
						}
						if(gate.offset > desc.limit)
						{
							logerror("CALL: Call gate: EIP is past segment limit.\n");
							FAULT(FAULT_GP,0) // #GP(0)
						}
					}
					else
					{
						UINT32 newESP = i286_get_stack_ptr(cpustate,DPL) & 0x0000ffff;
						if(newESP < ((gate.dword_count & 0x1f) + 8))
						{
							logerror("CALL: Call gate: New stack has no room for 16-bit return address and parameters.\n");
							FAULT(FAULT_SS,0) // #SS(0)
						}
						if((gate.offset & 0xffff) > desc.limit)
						{
							logerror("CALL: Call gate: IP is past segment limit.\n");
							FAULT(FAULT_GP,0) // #GP(0)
						}
					}
					selector = gate.selector;
					offset = gate.offset;

					/* switch to new stack */
					oldSS = cpustate->sreg[SS].selector;
					if(operand32 != 0)
					{
						oldESP = REG32(ESP);
						cpustate->sreg[SS].selector = i386_get_stack_segment(cpustate,gate.selector & 0x03);
					}
					else
					{
						oldESP = REG16(SP);
						cpustate->sreg[SS].selector = i286_get_stack_segment(cpustate,gate.selector & 0x03);
					}
					i386_load_segment_descriptor(cpustate, SS );
					if(operand32 != 0)
						REG32(ESP) = i386_get_stack_ptr(cpustate,gate.selector & 0x03);
					else
						REG16(SP) = i286_get_stack_ptr(cpustate,gate.selector & 0x03) & 0x0000ffff;

					if(operand32 != 0)
					{
						PUSH32(cpustate,oldSS);
						PUSH32(cpustate,oldESP);
					}
					else
					{
						PUSH16(cpustate,oldSS);
						PUSH16(cpustate,oldESP & 0xffff);
					}

					memset(&temp, 0, sizeof(temp));
					temp.selector = oldSS;
					i386_load_protected_mode_segment(cpustate,&temp);
					/* copy parameters from old stack to new stack */
					for(x=(gate.dword_count & 0x1f)-1;x>=0;x--)
					{
						UINT32 addr = temp.base + oldESP + (x*2);
						PUSH16(cpustate,READ16(cpustate,addr));
					}
					cpustate->CPL = (stack.flags >> 5) & 0x03;
					SetRPL = 1;
				}
				else
				{
					/* same privilege */
					if (operand32 != 0)  // if 32-bit
					{
						if(REG32(ESP) < 8)
						{
							logerror("CALL: Stack has no room for return address.\n");
							FAULT(FAULT_SS,0) // #SS(0)
						}
						selector = gate.selector;
						offset = gate.offset;
					}
					else
					{
						if(REG16(SP) < 4)
						{
							logerror("CALL: Stack has no room for return address.\n");
							FAULT(FAULT_SS,0) // #SS(0)
						}
						selector = gate.selector;
						offset = gate.offset & 0xffff;
					}
					if(offset > desc.limit)
					{
						logerror("CALL: EIP is past segment limit.\n");
						FAULT(FAULT_GP,0) // #GP(0)
					}
				}
				break;
			case 0x05:  // task gate
				logerror("CALL: Task gate at %08x\n",cpustate->pc);
				memset(&gate, 0, sizeof(gate));
				gate.segment = selector;
				i386_load_call_gate(cpustate,&gate);
				DPL = gate.dpl;
				if(DPL < CPL)
				{
					logerror("CALL: Task Gate: Gate DPL is less than CPL.\n");
					FAULT(FAULT_TS,selector & ~0x07) // #TS(selector)
				}
				if(DPL < RPL)
				{
					logerror("CALL: Task Gate: Gate DPL is less than RPL.\n");
					FAULT(FAULT_TS,selector & ~0x07) // #TS(selector)
				}
				if(gate.ar & 0x0080)
				{
					logerror("CALL: Task Gate: Gate is not present.\n");
					FAULT(FAULT_NP,selector & ~0x07) // #NP(selector)
				}
				/* Check the TSS that the task gate points to */
				desc.selector = gate.selector;
				i386_load_protected_mode_segment(cpustate,&desc);
				if(gate.selector & 0x04)
				{
					logerror("CALL: Task Gate: TSS is not global.\n");
					FAULT(FAULT_TS,gate.selector & ~0x07) // #TS(selector)
				}
				else
				{
					if((gate.selector & ~0x07) > cpustate->gdtr.limit)
					{
						logerror("CALL: Task Gate: TSS is past GDT limit.\n");
						FAULT(FAULT_TS,gate.selector & ~0x07) // #TS(selector)
					}
				}
				if(desc.flags & 0x0002)
				{
					logerror("CALL: Task Gate: TSS is busy.\n");
					FAULT(FAULT_TS,gate.selector & ~0x07) // #TS(selector)
				}
				if(desc.flags & 0x0080)
				{
					logerror("CALL: Task Gate: TSS is not present.\n");
					FAULT(FAULT_NP,gate.selector & ~0x07) // #TS(selector)
				}
				if(desc.flags & 0x08)
					i386_task_switch(cpustate,desc.selector,1);  // with nesting
				else
					i286_task_switch(cpustate,desc.selector,1);
				return;
				break;
			default:
				logerror("CALL: Invalid special segment type (%i) to jump to.\n",desc.flags & 0x000f);
				FAULT(FAULT_GP,selector & ~0x07)  // #GP(selector)
			}
		}
	}

	if(SetRPL != 0)
		selector = (selector & ~0x03) | cpustate->CPL;
	if(operand32 == 0)
	{
		/* 16-bit operand size */
		PUSH16(cpustate, cpustate->sreg[CS].selector );
		PUSH16(cpustate, cpustate->eip & 0x0000ffff );
		cpustate->sreg[CS].selector = selector;
		cpustate->performed_intersegment_jump = 1;
		cpustate->eip = offset;
		i386_load_segment_descriptor(cpustate,CS);
	}
	else
	{
		/* 32-bit operand size */
		PUSH32(cpustate, cpustate->sreg[CS].selector );
		PUSH32(cpustate, cpustate->eip );
		cpustate->sreg[CS].selector = selector;
		cpustate->performed_intersegment_jump = 1;
		cpustate->eip = offset;
		i386_load_segment_descriptor(cpustate, CS );
	}
	CHANGE_PC(cpustate,cpustate->eip);
}

static void i386_protected_mode_retf(i386_state* cpustate, UINT8 count, UINT8 operand32)
{
	UINT32 newCS, newEIP;
	UINT32 newSS, newESP;  // when changing privilege
	I386_SREG desc;
	UINT8 CPL, RPL, DPL;

	if(operand32 == 0)
	{
		newEIP = POP16(cpustate) & 0xffff;
		newCS = POP16(cpustate) & 0xffff;
		REG16(SP) += count;
	}
	else
	{
		newEIP = POP32(cpustate);
		newCS = POP32(cpustate) & 0xffff;
		REG32(ESP) += count;
	}

	memset(&desc, 0, sizeof(desc));
	desc.selector = newCS;
	i386_load_protected_mode_segment(cpustate,&desc);
	CPL = cpustate->CPL;  // current privilege level
	DPL = (desc.flags >> 5) & 0x03;  // descriptor privilege level
	RPL = newCS & 0x03;

	if(RPL < CPL)
	{
		logerror("RETF: Return segment RPL is less than CPL.\n");
		FAULT(FAULT_GP,newCS & ~0x07)
	}

	if(RPL == CPL)
	{
		/* same privilege level */
		if((newCS & ~0x07) == 0)
		{
			logerror("RETF: Return segment RPL is less than CPL.\n");
			FAULT(FAULT_GP,0)
		}
		if(newCS & 0x04)
		{
			if((newCS & ~0x07) > cpustate->ldtr.limit)
			{
				logerror("RETF: Return segment is past LDT limit.\n");
				FAULT(FAULT_GP,newCS & ~0x07)
			}
		}
		else
		{
			if((newCS & ~0x07) > cpustate->gdtr.limit)
			{
				logerror("RETF: Return segment is past GDT limit.\n");
				FAULT(FAULT_GP,newCS & ~0x07)
			}
		}
		if((desc.flags & 0x0018) != 0x0018)
		{
			logerror("RETF: Return segment is not a code segment.\n");
			FAULT(FAULT_GP,newCS & ~0x07)
		}
		if(desc.flags & 0x0004)
		{
			if(DPL > CPL)
			{
				logerror("RETF: Conforming code segment DPL is greater than CPL.\n");
				FAULT(FAULT_GP,newCS & ~0x07)
			}
		}
		else
		{
			if(DPL != CPL)
			{
				logerror("RETF: Non-conforming code segment DPL does not equal CPL.\n");
				FAULT(FAULT_GP,newCS & ~0x07)
			}
		}
		if((desc.flags & 0x0080) == 0)
		{
			logerror("RETF: Code segment is not present.\n");
			FAULT(FAULT_NP,newCS & ~0x07)
		}
		if(newEIP > desc.limit)
		{
			logerror("RETF: EIP is past code segment limit.\n");
			FAULT(FAULT_GP,0)
		}
		if(operand32 == 0)
		{
			if(REG16(SP) > (cpustate->sreg[SS].limit & 0xffff))
			{
				logerror("RETF: SP is past stack segment limit.\n");
				FAULT(FAULT_SS,0)
			}
		}
		else
		{
			if(REG32(ESP) > cpustate->sreg[SS].limit)
			{
				logerror("RETF: ESP is past stack segment limit.\n");
				FAULT(FAULT_SS,0)
			}
		}
	}
	else if(RPL > CPL)
	{
		/* outer privilege level */
		if(operand32 == 0)
		{
			newESP = POP16(cpustate) & 0xffff;
			newSS = POP16(cpustate);
			if(newESP+8+count > cpustate->sreg[SS].limit)
			{
				logerror("RETF: SP is past stack segment limit.\n");
				FAULT(FAULT_SS,0)
			}
		}
		else
		{
			newESP = POP32(cpustate);
			newSS = POP32(cpustate);
			if(newESP+16+count > cpustate->sreg[SS].limit)
			{
				logerror("RETF: ESP is past stack segment limit.\n");
				FAULT(FAULT_SS,0)
			}
		}

		/* Check CS selector and descriptor */
		if((newCS & ~0x07) == 0)
		{
			logerror("RETF: CS segment is null.\n");
			FAULT(FAULT_GP,0)
		}
		if(newCS & 0x04)
		{
			if((newCS & ~0x07) > cpustate->ldtr.limit)
			{
				logerror("RETF: CS segment selector is past LDT limit.\n");
				FAULT(FAULT_GP,newCS & ~0x07)
			}
		}
		else
		{
			if((newCS & ~0x07) > cpustate->gdtr.limit)
			{
				logerror("RETF: CS segment selector is past GDT limit.\n");
				FAULT(FAULT_GP,newCS & ~0x07)
			}
		}
		if((desc.flags & 0x0018) != 0x0018)
		{
			logerror("RETF: CS segment is not a code segment.\n");
			FAULT(FAULT_GP,newCS & ~0x07)
		}
		if(desc.flags & 0x0004)
		{
			if(DPL > RPL)
			{
				logerror("RETF: Conforming CS segment DPL is greater than return selector RPL.\n");
				FAULT(FAULT_GP,newCS & ~0x07)
			}
		}
		else
		{
			if(DPL != RPL)
			{
				logerror("RETF: Non-conforming CS segment DPL is not equal to return selector RPL.\n");
				FAULT(FAULT_GP,newCS & ~0x07)
			}
		}
		if((desc.flags & 0x0080) == 0)
		{
			logerror("RETF: CS segment is not present.\n");
			FAULT(FAULT_NP,newCS & ~0x07)
		}
		if(newEIP > desc.limit)
		{
			logerror("RETF: EIP is past return CS segment limit.\n");
			FAULT(FAULT_GP,0)
		}
		/* Check SS selector and descriptor */
		desc.selector = newSS;
		i386_load_protected_mode_segment(cpustate,&desc);
		DPL = (desc.flags >> 5) & 0x03;  // descriptor privilege level
		if((newSS & ~0x07) == 0)
		{
			logerror("RETF: SS segment is null.\n");
			FAULT(FAULT_GP,0)
		}
		if(newSS & 0x04)
		{
			if((newSS & ~0x07) > cpustate->ldtr.limit)
			{
				logerror("RETF: SS segment selector is past LDT limit.\n");
				FAULT(FAULT_GP,newSS & ~0x07)
			}
		}
		else
		{
			if((newSS & ~0x07) > cpustate->gdtr.limit)
			{
				logerror("RETF: SS segment selector is past GDT limit.\n");
				FAULT(FAULT_GP,newSS & ~0x07)
			}
		}
		if((newSS & 0x03) != RPL)
		{
			logerror("RETF: SS segment RPL is not equal to CS segment RPL.\n");
			FAULT(FAULT_GP,newSS & ~0x07)
		}
		if((desc.flags & 0x0018) != 0x0010 || (desc.flags & 0x0002) == 0)
		{
			logerror("RETF: SS segment is not a writable data segment.\n");
			FAULT(FAULT_GP,newSS & ~0x07)
		}
		if(((desc.flags >> 5) & 0x03) != RPL)
		{
			logerror("RETF: SS DPL is not equal to CS segment RPL.\n");
			FAULT(FAULT_GP,newSS & ~0x07)
		}
		if((desc.flags & 0x0080) == 0)
		{
			logerror("RETF: SS segment is not present.\n");
			FAULT(FAULT_GP,newSS & ~0x07)
		}
		cpustate->CPL = newCS & 0x03;

		/* Load new SS:(E)SP */
		if(operand32 == 0)
			REG16(SP) = newESP & 0xffff;
		else
			REG32(ESP) = newESP;
		cpustate->sreg[SS].selector = newSS;
		i386_load_segment_descriptor(cpustate, SS );

		if(operand32 == 0)
			REG16(SP) += count;
		else
			REG32(ESP) += count;

		/* Check that DS, ES, FS and GS are valid for the new privilege level */
		i386_check_sreg_validity(cpustate,DS);
		i386_check_sreg_validity(cpustate,ES);
		i386_check_sreg_validity(cpustate,FS);
		i386_check_sreg_validity(cpustate,GS);
	}

	/* Load new CS:(E)IP */
	if(operand32 == 0)
		cpustate->eip = newEIP & 0xffff;
	else
		cpustate->eip = newEIP;
	cpustate->sreg[CS].selector = newCS;
	i386_load_segment_descriptor(cpustate, CS );
	CHANGE_PC(cpustate,cpustate->eip);
}

static void i386_protected_mode_iret(i386_state* cpustate, int operand32)
{
	UINT32 newCS, newEIP;
	UINT32 newSS, newESP;  // when changing privilege
	I386_SREG desc;
	UINT8 CPL, RPL, DPL;
	UINT32 newflags;

	CPL = cpustate->CPL;
	if(operand32 == 0)
	{
		newEIP = POP16(cpustate);
		newCS = POP16(cpustate);
		newflags = POP16(cpustate);
	}
	else
	{
		newEIP = POP32(cpustate);
		newCS = POP32(cpustate) & 0xffff;
		newflags = POP32(cpustate);
	}

	if(V8086_MODE)
	{
		logerror("IRET: Is in Virtual 8086 mode.\n");
		FAULT(FAULT_GP,0)
	}
	else if(NESTED_TASK)
	{
		UINT32 task = READ32(cpustate,cpustate->task.base);
		/* Task Return */
		popmessage("IRET: Nested task return.");
		/* Check back-link selector in TSS */
		if(task & 0x04)
		{
			logerror("IRET: Task return: Back-linked TSS is not in GDT.\n");
			FAULT(FAULT_TS,task & ~0x07)
		}
		if((task & ~0x07) > cpustate->gdtr.limit)
		{
			logerror("IRET: Task return: Back-linked TSS is not in GDT.\n");
			FAULT(FAULT_TS,task & ~0x07)
		}
		memset(&desc, 0, sizeof(desc));
		desc.selector = task;
		i386_load_protected_mode_segment(cpustate,&desc);
		if((desc.flags & 0x001f) != 0x000b)
		{
			logerror("IRET: Task return: Back-linked TSS is not a busy TSS.\n");
			FAULT(FAULT_TS,task & ~0x07)
		}
		if((desc.flags & 0x0080) == 0)
		{
			logerror("IRET: Task return: Back-linked TSS is not present.\n");
			FAULT(FAULT_NP,task & ~0x07)
		}
		if(desc.flags & 0x08)
			i386_task_switch(cpustate,desc.selector,0);
		else
			i286_task_switch(cpustate,desc.selector,0);
		return;
	}
	else
	{
		if(newflags & 0x00020000) // if returning to virtual 8086 mode
		{
			/* Return to v86 mode */
			popmessage("IRET: Unimplemented return to Virtual 8086 mode.");
		}
		else
		{
			if(operand32 == 0)
			{
				if(REG16(SP)+4 > cpustate->sreg[SS].limit)
				{
					logerror("IRET: Data on stack is past SS limit.\n");
					FAULT(FAULT_SS,0)
				}
			}
			else
			{
				if(REG32(ESP)+6 > cpustate->sreg[SS].limit)
				{
					logerror("IRET: Data on stack is past SS limit.\n");
					FAULT(FAULT_SS,0)
				}
			}
			RPL = newCS & 0x03;
			if(RPL < CPL)
			{
				logerror("IRET: Return CS RPL is less than CPL.\n");
				FAULT(FAULT_GP,newCS & ~0x07)
			}
			if(RPL == CPL)
			{
				/* return to same privilege level */
				if(operand32 == 0)
				{
					if(REG16(SP)+6 > cpustate->sreg[SS].limit)
					{
						logerror("IRET: Data on stack is past SS limit.\n");
						FAULT(FAULT_SS,0)
					}
				}
				else
				{
					if(REG32(ESP)+12 > cpustate->sreg[SS].limit)
					{
						logerror("IRET: Data on stack is past SS limit.\n");
						FAULT(FAULT_SS,0)
					}
				}
				if((newCS & ~0x07) == 0)
				{
					logerror("IRET: Return CS selector is null.\n");
					FAULT(FAULT_GP,0)
				}
				if(newCS & 0x04)
				{
					if((newCS & ~0x07) > cpustate->ldtr.limit)
					{
						logerror("IRET: Return CS selector (%04x) is past LDT limit.\n",newCS);
						FAULT(FAULT_GP,newCS & ~0x07)
					}
				}
				else
				{
					if((newCS & ~0x07) > cpustate->gdtr.limit)
					{
						logerror("IRET: Return CS selector is past GDT limit.\n");
						FAULT(FAULT_GP,newCS & ~0x07)
					}
				}
				memset(&desc, 0, sizeof(desc));
				desc.selector = newCS;
				i386_load_protected_mode_segment(cpustate,&desc);
				DPL = (desc.flags >> 5) & 0x03;  // descriptor privilege level
				RPL = newCS & 0x03;
				if((desc.flags & 0x0018) != 0x0018)
				{
					logerror("IRET: Return CS segment is not a code segment.\n");
					FAULT(FAULT_GP,newCS & ~0x07)
				}
				if(desc.flags & 0x0004)
				{
					if(DPL > CPL)
					{
						logerror("IRET: Conforming return CS DPL is greater than CPL.\n");
						FAULT(FAULT_GP,newCS & ~0x07)
					}
				}
				else
				{
					if(DPL != CPL)
					{
						logerror("IRET: Non-conforming return CS DPL is not equal to CPL.\n");
						FAULT(FAULT_GP,newCS & ~0x07)
					}
				}
				if((desc.flags & 0x0080) == 0)
				{
					logerror("IRET: Return CS segment is not present.\n");
					FAULT(FAULT_NP,newCS & ~0x07)
				}
				if(newEIP > desc.limit)
				{
					logerror("IRET: Return EIP is past return CS limit.\n");
					FAULT(FAULT_GP,0)				}

				if(operand32 == 0)
				{
					cpustate->eip = newEIP;
					cpustate->sreg[CS].selector = newCS;
					set_flags(cpustate,newflags);
				}
				else
				{
					cpustate->eip = newEIP;
					cpustate->sreg[CS].selector = newCS & 0xffff;
					set_flags(cpustate,newflags);
				}
			}
			else if(RPL > CPL)
			{
				I386_SREG stack;
				/* return to outer privilege level */
				if(operand32 == 0)
				{
					newESP = POP16(cpustate);
					newSS = POP16(cpustate);
					if(REG16(SP) > cpustate->sreg[SS].limit)
					{
						logerror("IRET: ESP is past SS limit.\n");
						FAULT(FAULT_SS,0)					}
				}
				else
				{
					newESP = POP32(cpustate);
					newSS = POP32(cpustate) & 0xffff;
					if(REG32(ESP) > cpustate->sreg[SS].limit)
					{
						logerror("IRET: ESP is past SS limit.\n");
						FAULT(FAULT_SS,0)
					}
				}
				memset(&desc, 0, sizeof(desc));
				desc.selector = newCS;
				i386_load_protected_mode_segment(cpustate,&desc);
				DPL = (desc.flags >> 5) & 0x03;  // descriptor privilege level
				RPL = newCS & 0x03;
				memset(&stack, 0, sizeof(stack));
				stack.selector = newSS;
				i386_load_protected_mode_segment(cpustate,&stack);
				/* Check CS selector and descriptor */
				if((newCS & ~0x07) == 0)
				{
					logerror("IRET: Return CS selector is null.\n");
					FAULT(FAULT_GP,0)
				}
				if(newCS & 0x04)
				{
					if((newCS & ~0x07) > cpustate->ldtr.limit)
					{
						logerror("IRET: Return CS selector is past LDT limit.\n");
						FAULT(FAULT_GP,newCS & ~0x07);
					}
				}
				else
				{
					if((newCS & ~0x07) > cpustate->gdtr.limit)
					{
						logerror("IRET: Return CS selector is past GDT limit.\n");
						FAULT(FAULT_GP,newCS & ~0x07);
					}
				}
				if((desc.flags & 0x0018) != 0x0018)
				{
					logerror("IRET: Return CS segment is not a code segment.\n");
					FAULT(FAULT_GP,newCS & ~0x07)
				}
				if(desc.flags & 0x0004)
				{
					if(DPL <= CPL)
					{
						logerror("IRET: Conforming return CS DPL is not greater than CPL.\n");
						FAULT(FAULT_GP,newCS & ~0x07)
					}
				}
				else
				{
					if(DPL != RPL)
					{
						logerror("IRET: Non-conforming return CS DPL does not equal CS RPL.\n");
						FAULT(FAULT_GP,newCS & ~0x07)
					}
				}
				if((desc.flags & 0x0080) == 0)
				{
					logerror("IRET: Return CS segment is not present.\n");
					FAULT(FAULT_NP,newCS & ~0x07)
				}

				/* Check SS selector and descriptor */
				DPL = (stack.flags >> 5) & 0x03;
				if((newSS & ~0x07) == 0)
				{
					logerror("IRET: Return SS selector is null.\n");
					FAULT(FAULT_GP,0)
				}
				if(newSS & 0x04)
				{
					if((newSS & ~0x07) > cpustate->ldtr.limit)
					{
						logerror("IRET: Return SS selector is past LDT limit.\n");
						FAULT(FAULT_GP,newSS & ~0x07);
					}
				}
				else
				{
					if((newSS & ~0x07) > cpustate->gdtr.limit)
					{
						logerror("IRET: Return SS selector is past GDT limit.\n");
						FAULT(FAULT_GP,newSS & ~0x07);
					}
				}
				if((newSS & 0x03) != RPL)
				{
					logerror("IRET: Return SS RPL is not equal to return CS RPL.\n");
					FAULT(FAULT_GP,newSS & ~0x07)
				}
				if((stack.flags & 0x0018) != 0x0010)
				{
					logerror("IRET: Return SS segment is not a data segment.\n");
					FAULT(FAULT_GP,newSS & ~0x07)
				}
				if((stack.flags & 0x0002) == 0)
				{
					logerror("IRET: Return SS segment is not writable.\n");
					FAULT(FAULT_GP,newSS & ~0x07)
				}
				if(DPL != RPL)
				{
					logerror("IRET: Return SS DPL does not equal SS RPL.\n");
					FAULT(FAULT_GP,newSS & ~0x07)
				}
				if((stack.flags & 0x0080) == 0)
				{
					logerror("IRET: Return SS segment is not present.\n");
					FAULT(FAULT_NP,newSS & ~0x07)
				}
				if(newEIP > desc.limit)
				{
					logerror("IRET: EIP is past return CS limit.\n");
					FAULT(FAULT_GP,0)
				}

				if(operand32 == 0)
				{
					cpustate->eip = newEIP & 0xffff;
					cpustate->sreg[CS].selector = newCS;
					set_flags(cpustate,newflags);
					REG16(SP) = newESP & 0xffff;
					cpustate->sreg[SS].selector = newSS;
				}
				else
				{
					cpustate->eip = newEIP;
					cpustate->sreg[CS].selector = newCS & 0xffff;
					set_flags(cpustate,newflags);
					REG32(ESP) = newESP;
					cpustate->sreg[SS].selector = newSS & 0xffff;
				}
				cpustate->CPL = newCS & 0x03;
				i386_load_segment_descriptor(cpustate,SS);

				/* Check that DS, ES, FS and GS are valid for the new privilege level */
				i386_check_sreg_validity(cpustate,DS);
				i386_check_sreg_validity(cpustate,ES);
				i386_check_sreg_validity(cpustate,FS);
				i386_check_sreg_validity(cpustate,GS);
			}
		}
	}

	i386_load_segment_descriptor(cpustate,CS);
	CHANGE_PC(cpustate,cpustate->eip);
}

#include "cycles.h"

static UINT8 *cycle_table_rm[X86_NUM_CPUS];
static UINT8 *cycle_table_pm[X86_NUM_CPUS];

#define CYCLES_NUM(x)	(cpustate->cycles -= (x))

INLINE void CYCLES(i386_state *cpustate,int x)
{
	if (PROTECTED_MODE)
	{
		cpustate->cycles -= cpustate->cycle_table_pm[x];
	}
	else
	{
		cpustate->cycles -= cpustate->cycle_table_rm[x];
	}
}

INLINE void CYCLES_RM(i386_state *cpustate,int modrm, int r, int m)
{
	if (modrm >= 0xc0)
	{
		if (PROTECTED_MODE)
		{
			cpustate->cycles -= cpustate->cycle_table_pm[r];
		}
		else
		{
			cpustate->cycles -= cpustate->cycle_table_rm[r];
		}
	}
	else
	{
		if (PROTECTED_MODE)
		{
			cpustate->cycles -= cpustate->cycle_table_pm[m];
		}
		else
		{
			cpustate->cycles -= cpustate->cycle_table_rm[m];
		}
	}
}

static void build_cycle_table(running_machine &machine)
{
	int i, j;
	for (j=0; j < X86_NUM_CPUS; j++)
	{
		cycle_table_rm[j] = auto_alloc_array(machine, UINT8, CYCLES_NUM_OPCODES);
		cycle_table_pm[j] = auto_alloc_array(machine, UINT8, CYCLES_NUM_OPCODES);

		for (i=0; i < sizeof(x86_cycle_table)/sizeof(X86_CYCLE_TABLE); i++)
		{
			int opcode = x86_cycle_table[i].op;
			cycle_table_rm[j][opcode] = x86_cycle_table[i].cpu_cycles[j][0];
			cycle_table_pm[j][opcode] = x86_cycle_table[i].cpu_cycles[j][1];
		}
	}
}

/* Forward declarations */
static void I386OP(decode_opcode)(i386_state *cpustate);
static void I386OP(decode_two_byte)(i386_state *cpustate);



#include "i386ops.c"
#include "i386op16.c"
#include "i386op32.c"
#include "i486ops.c"
#include "pentops.c"
#include "x87ops.c"
#include "i386ops.h"

static void I386OP(decode_opcode)(i386_state *cpustate)
{
	cpustate->opcode = FETCH(cpustate);
	if( cpustate->operand_size )
		cpustate->opcode_table1_32[cpustate->opcode](cpustate);
	else
		cpustate->opcode_table1_16[cpustate->opcode](cpustate);
}

/* Two-byte opcode prefix */
static void I386OP(decode_two_byte)(i386_state *cpustate)
{
	cpustate->opcode = FETCH(cpustate);
	if( cpustate->operand_size )
		cpustate->opcode_table2_32[cpustate->opcode](cpustate);
	else
		cpustate->opcode_table2_16[cpustate->opcode](cpustate);
}

/*************************************************************************/

static UINT64 i386_debug_segbase(symbol_table &table, void *ref, int params, const UINT64 *param)
{
	legacy_cpu_device *device = (legacy_cpu_device *)ref;
	i386_state *cpustate = get_safe_token(device);
	UINT32 result;
	I386_SREG seg;

	if (PROTECTED_MODE)
	{
		memset(&seg, 0, sizeof(seg));
		seg.selector = (UINT16) param[0];
		i386_load_protected_mode_segment(cpustate,&seg);
		result = seg.base;
	}
	else
	{
		result = param[0] << 4;
	}
	return result;
}

static UINT64 i386_debug_seglimit(symbol_table &table, void *ref, int params, const UINT64 *param)
{
	legacy_cpu_device *device = (legacy_cpu_device *)ref;
	i386_state *cpustate = get_safe_token(device);
	UINT32 result = 0;
	I386_SREG seg;

	if (PROTECTED_MODE)
	{
		memset(&seg, 0, sizeof(seg));
		seg.selector = (UINT16) param[0];
		i386_load_protected_mode_segment(cpustate,&seg);
		result = seg.limit;
	}
	return result;
}

static CPU_DEBUG_INIT( i386 )
{
	device->debug()->symtable().add("segbase", (void *)device, 1, 1, i386_debug_segbase);
	device->debug()->symtable().add("seglimit", (void *)device, 1, 1, i386_debug_seglimit);
}

/*************************************************************************/

static void i386_postload(i386_state *cpustate)
{
	int i;
	for (i = 0; i < 6; i++)
		i386_load_segment_descriptor(cpustate,i);
	CHANGE_PC(cpustate,cpustate->eip);
}

static CPU_INIT( i386 )
{
	int i, j;
	static const int regs8[8] = {AL,CL,DL,BL,AH,CH,DH,BH};
	static const int regs16[8] = {AX,CX,DX,BX,SP,BP,SI,DI};
	static const int regs32[8] = {EAX,ECX,EDX,EBX,ESP,EBP,ESI,EDI};
	i386_state *cpustate = get_safe_token(device);

	build_cycle_table(device->machine());

	for( i=0; i < 256; i++ ) {
		int c=0;
		for( j=0; j < 8; j++ ) {
			if( i & (1 << j) )
				c++;
		}
		i386_parity_table[i] = ~(c & 0x1) & 0x1;
	}

	for( i=0; i < 256; i++ ) {
		i386_MODRM_table[i].reg.b = regs8[(i >> 3) & 0x7];
		i386_MODRM_table[i].reg.w = regs16[(i >> 3) & 0x7];
		i386_MODRM_table[i].reg.d = regs32[(i >> 3) & 0x7];

		i386_MODRM_table[i].rm.b = regs8[i & 0x7];
		i386_MODRM_table[i].rm.w = regs16[i & 0x7];
		i386_MODRM_table[i].rm.d = regs32[i & 0x7];
	}

	cpustate->irq_callback = irqcallback;
	cpustate->device = device;
	cpustate->program = device->space(AS_PROGRAM);
	cpustate->direct = &cpustate->program->direct();
	cpustate->io = device->space(AS_IO);

	device->save_item(NAME(	cpustate->reg.d));
	device->save_item(NAME(cpustate->sreg[ES].selector));
	device->save_item(NAME(cpustate->sreg[ES].base));
	device->save_item(NAME(cpustate->sreg[ES].limit));
	device->save_item(NAME(cpustate->sreg[ES].flags));
	device->save_item(NAME(cpustate->sreg[CS].selector));
	device->save_item(NAME(cpustate->sreg[CS].base));
	device->save_item(NAME(cpustate->sreg[CS].limit));
	device->save_item(NAME(cpustate->sreg[CS].flags));
	device->save_item(NAME(cpustate->sreg[SS].selector));
	device->save_item(NAME(cpustate->sreg[SS].base));
	device->save_item(NAME(cpustate->sreg[SS].limit));
	device->save_item(NAME(cpustate->sreg[SS].flags));
	device->save_item(NAME(cpustate->sreg[DS].selector));
	device->save_item(NAME(cpustate->sreg[DS].base));
	device->save_item(NAME(cpustate->sreg[DS].limit));
	device->save_item(NAME(cpustate->sreg[DS].flags));
	device->save_item(NAME(cpustate->sreg[FS].selector));
	device->save_item(NAME(cpustate->sreg[FS].base));
	device->save_item(NAME(cpustate->sreg[FS].limit));
	device->save_item(NAME(cpustate->sreg[FS].flags));
	device->save_item(NAME(cpustate->sreg[GS].selector));
	device->save_item(NAME(cpustate->sreg[GS].base));
	device->save_item(NAME(cpustate->sreg[GS].limit));
	device->save_item(NAME(cpustate->sreg[GS].flags));
	device->save_item(NAME(cpustate->eip));
	device->save_item(NAME(cpustate->prev_eip));
	device->save_item(NAME(cpustate->CF));
	device->save_item(NAME(cpustate->DF));
	device->save_item(NAME(cpustate->SF));
	device->save_item(NAME(cpustate->OF));
	device->save_item(NAME(cpustate->ZF));
	device->save_item(NAME(cpustate->PF));
	device->save_item(NAME(cpustate->AF));
	device->save_item(NAME(cpustate->IF));
	device->save_item(NAME(cpustate->TF));
	device->save_item(NAME(	cpustate->cr));
	device->save_item(NAME(	cpustate->dr));
	device->save_item(NAME(	cpustate->tr));
	device->save_item(NAME(cpustate->idtr.base));
	device->save_item(NAME(cpustate->idtr.limit));
	device->save_item(NAME(cpustate->gdtr.base));
	device->save_item(NAME(cpustate->gdtr.limit));
	device->save_item(NAME(cpustate->task.base));
	device->save_item(NAME(cpustate->task.segment));
	device->save_item(NAME(cpustate->task.limit));
	device->save_item(NAME(cpustate->task.flags));
	device->save_item(NAME(cpustate->ldtr.base));
	device->save_item(NAME(cpustate->ldtr.segment));
	device->save_item(NAME(cpustate->ldtr.limit));
	device->save_item(NAME(cpustate->ldtr.flags));
	device->save_item(NAME(cpustate->irq_state));
	device->save_item(NAME(cpustate->performed_intersegment_jump));
	device->machine().save().register_postload(save_prepost_delegate(FUNC(i386_postload), cpustate));
}

static void build_opcode_table(i386_state *cpustate, UINT32 features)
{
	int i;
	for (i=0; i < 256; i++)
	{
		cpustate->opcode_table1_16[i] = I386OP(invalid);
		cpustate->opcode_table1_32[i] = I386OP(invalid);
		cpustate->opcode_table2_16[i] = I386OP(invalid);
		cpustate->opcode_table2_32[i] = I386OP(invalid);
	}

	for (i=0; i < sizeof(x86_opcode_table)/sizeof(X86_OPCODE); i++)
	{
		const X86_OPCODE *op = &x86_opcode_table[i];

		if ((op->flags & features))
		{
			if (op->flags & OP_2BYTE)
			{
				cpustate->opcode_table2_32[op->opcode] = op->handler32;
				cpustate->opcode_table2_16[op->opcode] = op->handler16;
			}
			else
			{
				cpustate->opcode_table1_32[op->opcode] = op->handler32;
				cpustate->opcode_table1_16[op->opcode] = op->handler16;
			}
		}
	}
}

static CPU_RESET( i386 )
{
	i386_state *cpustate = get_safe_token(device);
	device_irq_callback save_irqcallback;

	save_irqcallback = cpustate->irq_callback;
	memset( cpustate, 0, sizeof(*cpustate) );
	cpustate->irq_callback = save_irqcallback;
	cpustate->device = device;
	cpustate->program = device->space(AS_PROGRAM);
	cpustate->direct = &cpustate->program->direct();
	cpustate->io = device->space(AS_IO);

	cpustate->sreg[CS].selector = 0xf000;
	cpustate->sreg[CS].base		= 0xffff0000;
	cpustate->sreg[CS].limit	= 0xffff;

	cpustate->sreg[DS].base = cpustate->sreg[ES].base = cpustate->sreg[FS].base = cpustate->sreg[GS].base = cpustate->sreg[SS].base = 0x00000000;
	cpustate->sreg[DS].limit = cpustate->sreg[ES].limit = cpustate->sreg[FS].limit = cpustate->sreg[GS].limit = cpustate->sreg[SS].limit = 0xffff;
	cpustate->sreg[DS].flags = cpustate->sreg[ES].flags = cpustate->sreg[FS].flags = cpustate->sreg[GS].flags = cpustate->sreg[SS].flags = 0x0092;

	cpustate->idtr.base = 0;
	cpustate->idtr.limit = 0x3ff;

	cpustate->a20_mask = ~0;

	cpustate->cr[0] = 0x7fffffe0; // reserved bits set to 1
	cpustate->eflags = 0;
	cpustate->eflags_mask = 0x00030000;
	cpustate->eip = 0xfff0;

	// [11:8] Family
	// [ 7:4] Model
	// [ 3:0] Stepping ID
	// Family 3 (386), Model 0 (DX), Stepping 8 (D1)
	REG32(EAX) = 0;
	REG32(EDX) = (3 << 8) | (0 << 4) | (8);

	cpustate->CPL = 0;

	build_opcode_table(cpustate, OP_I386);
	cpustate->cycle_table_rm = cycle_table_rm[CPU_CYCLES_I386];
	cpustate->cycle_table_pm = cycle_table_pm[CPU_CYCLES_I386];

	CHANGE_PC(cpustate,cpustate->eip);
}

static void i386_set_irq_line(i386_state *cpustate,int irqline, int state)
{
	if (state != CLEAR_LINE && cpustate->halted)
	{
		cpustate->halted = 0;
	}

	if ( irqline == INPUT_LINE_NMI )
	{
		/* NMI (I do not think that this is 100% right) */
		if ( state )
			i386_trap(cpustate,2, 1, 0);
	}
	else
	{
		cpustate->irq_state = state;
	}
}

static void i386_set_a20_line(i386_state *cpustate,int state)
{
	if (state)
	{
		cpustate->a20_mask = ~0;
	}
	else
	{
		cpustate->a20_mask = ~(1 << 20);
	}
}

static CPU_EXECUTE( i386 )
{
	i386_state *cpustate = get_safe_token(device);

	int cycles = cpustate->cycles;
	cpustate->base_cycles = cycles;
	CHANGE_PC(cpustate,cpustate->eip);

	if (cpustate->halted)
	{
		cpustate->tsc += cycles;
		cpustate->cycles = 0;
		return;
	}

	while( cpustate->cycles > 0 )
	{
		cpustate->operand_size = cpustate->sreg[CS].d;
		cpustate->address_size = cpustate->sreg[CS].d;

		cpustate->segment_prefix = 0;
		cpustate->prev_eip = cpustate->eip;

		debugger_instruction_hook(device, cpustate->pc);

		i386_check_irq_line(cpustate);
		if(cpustate->delayed_interrupt_enable != 0)
		{
			cpustate->IF = 1;
			cpustate->delayed_interrupt_enable = 0;
		}
		I386OP(decode_opcode)(cpustate);
	}
	cpustate->tsc += (cycles - cpustate->cycles);
}

/*************************************************************************/

static CPU_TRANSLATE( i386 )
{
	i386_state *cpustate = get_safe_token(device);
	int result = 1;
	if (space == AS_PROGRAM)
	{
		if (cpustate->cr[0] & 0x80000000)
			result = translate_address(cpustate,address);
		*address &= cpustate->a20_mask;
	}
	return result;
}

static CPU_DISASSEMBLE( i386 )
{
	i386_state *cpustate = get_safe_token(device);
	return i386_dasm_one(buffer, pc, oprom, cpustate->sreg[CS].d ? 32 : 16);
}

static CPU_SET_INFO( i386 )
{
	i386_state *cpustate = get_safe_token(device);

	if (state == CPUINFO_INT_INPUT_STATE+INPUT_LINE_A20)
	{
		i386_set_a20_line(cpustate,info->i);
		return;
	}
	if (state >= CPUINFO_INT_INPUT_STATE && state <= CPUINFO_INT_INPUT_STATE + MAX_INPUT_LINES)
	{
		i386_set_irq_line(cpustate,state-CPUINFO_INT_INPUT_STATE, info->i);
		return;
	}

	switch (state)
	{
		/* --- the following bits of info are set as 64-bit signed integers --- */
		case CPUINFO_INT_PC:
		case CPUINFO_INT_REGISTER + I386_PC:			cpustate->pc = info->i;							break;
		case CPUINFO_INT_REGISTER + I386_EIP:			cpustate->eip = info->i; CHANGE_PC(cpustate,cpustate->eip);		break;
		case CPUINFO_INT_REGISTER + I386_AL:			REG8(AL) = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_AH:			REG8(AH) = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_BL:			REG8(BL) = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_BH:			REG8(BH) = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_CL:			REG8(CL) = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_CH:			REG8(CH) = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_DL:			REG8(DL) = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_DH:			REG8(DH) = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_AX:			REG16(AX) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_BX:			REG16(BX) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_CX:			REG16(CX) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_DX:			REG16(DX) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_SI:			REG16(SI) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_DI:			REG16(DI) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_BP:			REG16(BP) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_SP:			REG16(SP) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_IP:			cpustate->eip = (cpustate->eip & ~0xFFFF) | (info->i & 0xFFFF); CHANGE_PC(cpustate,cpustate->eip); break;
		case CPUINFO_INT_REGISTER + I386_EAX:			REG32(EAX) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_EBX:			REG32(EBX) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_ECX:			REG32(ECX) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_EDX:			REG32(EDX) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_EBP:			REG32(EBP) = info->i;					break;
		case CPUINFO_INT_SP:
		case CPUINFO_INT_REGISTER + I386_ESP:			REG32(ESP) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_ESI:			REG32(ESI) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_EDI:			REG32(EDI) = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_EFLAGS:		cpustate->eflags = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_CS:			cpustate->sreg[CS].selector = info->i & 0xffff; i386_load_segment_descriptor(cpustate,CS); break;
		case CPUINFO_INT_REGISTER + I386_CS_BASE:		cpustate->sreg[CS].base = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_CS_LIMIT:		cpustate->sreg[CS].limit = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_CS_FLAGS:		cpustate->sreg[CS].flags = info->i & 0xf0ff;	break;
		case CPUINFO_INT_REGISTER + I386_SS:			cpustate->sreg[SS].selector = info->i & 0xffff; i386_load_segment_descriptor(cpustate,SS); break;
		case CPUINFO_INT_REGISTER + I386_SS_BASE:		cpustate->sreg[SS].base = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_SS_LIMIT:		cpustate->sreg[SS].limit = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_SS_FLAGS:		cpustate->sreg[SS].flags = info->i & 0xf0ff;	break;
		case CPUINFO_INT_REGISTER + I386_DS:			cpustate->sreg[DS].selector = info->i & 0xffff; i386_load_segment_descriptor(cpustate,DS); break;
		case CPUINFO_INT_REGISTER + I386_DS_BASE:		cpustate->sreg[DS].base = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_DS_LIMIT:		cpustate->sreg[DS].limit = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_DS_FLAGS:		cpustate->sreg[DS].flags = info->i & 0xf0ff;	break;
		case CPUINFO_INT_REGISTER + I386_ES:			cpustate->sreg[ES].selector = info->i & 0xffff; i386_load_segment_descriptor(cpustate,ES); break;
		case CPUINFO_INT_REGISTER + I386_ES_BASE:		cpustate->sreg[ES].base = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_ES_LIMIT:		cpustate->sreg[ES].limit = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_ES_FLAGS:		cpustate->sreg[ES].flags = info->i & 0xf0ff;	break;
		case CPUINFO_INT_REGISTER + I386_FS:			cpustate->sreg[FS].selector = info->i & 0xffff; i386_load_segment_descriptor(cpustate,FS); break;
		case CPUINFO_INT_REGISTER + I386_FS_BASE:		cpustate->sreg[FS].base = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_FS_LIMIT:		cpustate->sreg[FS].limit = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_FS_FLAGS:		cpustate->sreg[FS].flags = info->i & 0xf0ff;	break;
		case CPUINFO_INT_REGISTER + I386_GS:			cpustate->sreg[GS].selector = info->i & 0xffff; i386_load_segment_descriptor(cpustate,GS); break;
		case CPUINFO_INT_REGISTER + I386_GS_BASE:		cpustate->sreg[GS].base = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_GS_LIMIT:		cpustate->sreg[GS].limit = info->i;				break;
		case CPUINFO_INT_REGISTER + I386_GS_FLAGS:		cpustate->sreg[GS].flags = info->i & 0xf0ff;	break;
		case CPUINFO_INT_REGISTER + I386_CR0:			cpustate->cr[0] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_CR1:			cpustate->cr[1] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_CR2:			cpustate->cr[2] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_CR3:			cpustate->cr[3] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_CR4:			cpustate->cr[4] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_DR0:			cpustate->dr[0] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_DR1:			cpustate->dr[1] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_DR2:			cpustate->dr[2] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_DR3:			cpustate->dr[3] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_DR4:			cpustate->dr[4] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_DR5:			cpustate->dr[5] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_DR6:			cpustate->dr[6] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_DR7:			cpustate->dr[7] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_TR6:			cpustate->tr[6] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_TR7:			cpustate->tr[7] = info->i;						break;
		case CPUINFO_INT_REGISTER + I386_GDTR_BASE:		cpustate->gdtr.base = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_GDTR_LIMIT:	cpustate->gdtr.limit = info->i & 0xffff;		break;
		case CPUINFO_INT_REGISTER + I386_IDTR_BASE:		cpustate->idtr.base = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_IDTR_LIMIT:	cpustate->idtr.limit = info->i & 0xffff;		break;
		case CPUINFO_INT_REGISTER + I386_TR:			cpustate->task.segment = info->i & 0xffff;		break;
		case CPUINFO_INT_REGISTER + I386_TR_BASE:		cpustate->task.base = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_TR_LIMIT:		cpustate->task.limit = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_TR_FLAGS:		cpustate->task.flags = info->i & 0xf0ff;		break;
		case CPUINFO_INT_REGISTER + I386_LDTR:			cpustate->ldtr.segment = info->i & 0xffff;		break;
		case CPUINFO_INT_REGISTER + I386_LDTR_BASE:		cpustate->ldtr.base = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_LDTR_LIMIT:	cpustate->ldtr.limit = info->i;					break;
		case CPUINFO_INT_REGISTER + I386_LDTR_FLAGS:	cpustate->ldtr.flags = info->i & 0xf0ff;		break;
	}
}

CPU_GET_INFO( i386 )
{
	i386_state *cpustate = (device != NULL && device->token() != NULL) ? get_safe_token(device) : NULL;

	switch (state)
	{
		/* --- the following bits of info are returned as 64-bit signed integers --- */
		case CPUINFO_INT_CONTEXT_SIZE:					info->i = sizeof(i386_state);			break;
		case CPUINFO_INT_INPUT_LINES:					info->i = 32;							break;
		case CPUINFO_INT_DEFAULT_IRQ_VECTOR:			info->i = 0;							break;
		case DEVINFO_INT_ENDIANNESS:					info->i = ENDIANNESS_LITTLE;					break;
		case CPUINFO_INT_CLOCK_MULTIPLIER:				info->i = 1;							break;
		case CPUINFO_INT_CLOCK_DIVIDER:					info->i = 1;							break;
		case CPUINFO_INT_MIN_INSTRUCTION_BYTES:			info->i = 1;							break;
		case CPUINFO_INT_MAX_INSTRUCTION_BYTES:			info->i = 15;							break;
		case CPUINFO_INT_MIN_CYCLES:					info->i = 1;							break;
		case CPUINFO_INT_MAX_CYCLES:					info->i = 40;							break;

		case DEVINFO_INT_DATABUS_WIDTH + AS_PROGRAM:	info->i = 32;					break;
		case DEVINFO_INT_ADDRBUS_WIDTH + AS_PROGRAM: info->i = 32;					break;
		case DEVINFO_INT_ADDRBUS_SHIFT + AS_PROGRAM: info->i = 0;					break;
		case CPUINFO_INT_LOGADDR_WIDTH_PROGRAM: info->i = 32;					break;
		case CPUINFO_INT_PAGE_SHIFT_PROGRAM:	info->i = 12;					break;
		case DEVINFO_INT_DATABUS_WIDTH + AS_DATA:	info->i = 0;					break;
		case DEVINFO_INT_ADDRBUS_WIDTH + AS_DATA:	info->i = 0;					break;
		case DEVINFO_INT_ADDRBUS_SHIFT + AS_DATA:	info->i = 0;					break;
		case DEVINFO_INT_DATABUS_WIDTH + AS_IO:		info->i = 32;					break;
		case DEVINFO_INT_ADDRBUS_WIDTH + AS_IO:		info->i = 32;					break;
		case DEVINFO_INT_ADDRBUS_SHIFT + AS_IO:		info->i = 0;					break;

		case CPUINFO_INT_INPUT_STATE:					info->i = CLEAR_LINE;					break;

		case CPUINFO_INT_PREVIOUSPC:					/* not implemented */					break;

		case CPUINFO_INT_PC:
		case CPUINFO_INT_REGISTER + I386_PC:			info->i = cpustate->pc;							break;
		case CPUINFO_INT_REGISTER + I386_EIP:			info->i = cpustate->eip;						break;
		case CPUINFO_INT_REGISTER + I386_AL:			info->i = REG8(AL);						break;
		case CPUINFO_INT_REGISTER + I386_AH:			info->i = REG8(AH);						break;
		case CPUINFO_INT_REGISTER + I386_BL:			info->i = REG8(BL);						break;
		case CPUINFO_INT_REGISTER + I386_BH:			info->i = REG8(BH);						break;
		case CPUINFO_INT_REGISTER + I386_CL:			info->i = REG8(CL);						break;
		case CPUINFO_INT_REGISTER + I386_CH:			info->i = REG8(CH);						break;
		case CPUINFO_INT_REGISTER + I386_DL:			info->i = REG8(DL);						break;
		case CPUINFO_INT_REGISTER + I386_DH:			info->i = REG8(DH);						break;
		case CPUINFO_INT_REGISTER + I386_AX:			info->i = REG16(AX);					break;
		case CPUINFO_INT_REGISTER + I386_BX:			info->i = REG16(BX);					break;
		case CPUINFO_INT_REGISTER + I386_CX:			info->i = REG16(CX);					break;
		case CPUINFO_INT_REGISTER + I386_DX:			info->i = REG16(DX);					break;
		case CPUINFO_INT_REGISTER + I386_SI:			info->i = REG16(SI);					break;
		case CPUINFO_INT_REGISTER + I386_DI:			info->i = REG16(DI);					break;
		case CPUINFO_INT_REGISTER + I386_BP:			info->i = REG16(BP);					break;
		case CPUINFO_INT_REGISTER + I386_SP:			info->i = REG16(SP);					break;
		case CPUINFO_INT_REGISTER + I386_IP:			info->i = cpustate->eip & 0xFFFF;				break;
		case CPUINFO_INT_REGISTER + I386_EAX:			info->i = REG32(EAX);					break;
		case CPUINFO_INT_REGISTER + I386_EBX:			info->i = REG32(EBX);					break;
		case CPUINFO_INT_REGISTER + I386_ECX:			info->i = REG32(ECX);					break;
		case CPUINFO_INT_REGISTER + I386_EDX:			info->i = REG32(EDX);					break;
		case CPUINFO_INT_REGISTER + I386_EBP:			info->i = REG32(EBP);					break;
		case CPUINFO_INT_REGISTER + I386_ESP:			info->i = REG32(ESP);					break;
		case CPUINFO_INT_REGISTER + I386_ESI:			info->i = REG32(ESI);					break;
		case CPUINFO_INT_REGISTER + I386_EDI:			info->i = REG32(EDI);					break;
		case CPUINFO_INT_REGISTER + I386_EFLAGS:		info->i = cpustate->eflags;						break;
		case CPUINFO_INT_REGISTER + I386_CS:			info->i = cpustate->sreg[CS].selector;			break;
		case CPUINFO_INT_REGISTER + I386_CS_BASE:		info->i = cpustate->sreg[CS].base;				break;
		case CPUINFO_INT_REGISTER + I386_CS_LIMIT:		info->i = cpustate->sreg[CS].limit;				break;
		case CPUINFO_INT_REGISTER + I386_CS_FLAGS:		info->i = cpustate->sreg[CS].flags;				break;
		case CPUINFO_INT_REGISTER + I386_SS:			info->i = cpustate->sreg[SS].selector;			break;
		case CPUINFO_INT_REGISTER + I386_SS_BASE:		info->i = cpustate->sreg[SS].base;				break;
		case CPUINFO_INT_REGISTER + I386_SS_LIMIT:		info->i = cpustate->sreg[SS].limit;				break;
		case CPUINFO_INT_REGISTER + I386_SS_FLAGS:		info->i = cpustate->sreg[SS].flags;				break;
		case CPUINFO_INT_REGISTER + I386_DS:			info->i = cpustate->sreg[DS].selector;			break;
		case CPUINFO_INT_REGISTER + I386_DS_BASE:		info->i = cpustate->sreg[DS].base;				break;
		case CPUINFO_INT_REGISTER + I386_DS_LIMIT:		info->i = cpustate->sreg[DS].limit;				break;
		case CPUINFO_INT_REGISTER + I386_DS_FLAGS:		info->i = cpustate->sreg[DS].flags;				break;
		case CPUINFO_INT_REGISTER + I386_ES:			info->i = cpustate->sreg[ES].selector;			break;
		case CPUINFO_INT_REGISTER + I386_ES_BASE:		info->i = cpustate->sreg[ES].base;				break;
		case CPUINFO_INT_REGISTER + I386_ES_LIMIT:		info->i = cpustate->sreg[ES].limit;				break;
		case CPUINFO_INT_REGISTER + I386_ES_FLAGS:		info->i = cpustate->sreg[ES].flags;				break;
		case CPUINFO_INT_REGISTER + I386_FS:			info->i = cpustate->sreg[FS].selector;			break;
		case CPUINFO_INT_REGISTER + I386_FS_BASE:		info->i = cpustate->sreg[FS].base;				break;
		case CPUINFO_INT_REGISTER + I386_FS_LIMIT:		info->i = cpustate->sreg[FS].limit;				break;
		case CPUINFO_INT_REGISTER + I386_FS_FLAGS:		info->i = cpustate->sreg[FS].flags;				break;
		case CPUINFO_INT_REGISTER + I386_GS:			info->i = cpustate->sreg[GS].selector;			break;
		case CPUINFO_INT_REGISTER + I386_GS_BASE:		info->i = cpustate->sreg[GS].base;				break;
		case CPUINFO_INT_REGISTER + I386_GS_LIMIT:		info->i = cpustate->sreg[GS].limit;				break;
		case CPUINFO_INT_REGISTER + I386_GS_FLAGS:		info->i = cpustate->sreg[GS].flags;				break;
		case CPUINFO_INT_REGISTER + I386_CR0:			info->i = cpustate->cr[0];						break;
		case CPUINFO_INT_REGISTER + I386_CR1:			info->i = cpustate->cr[1];						break;
		case CPUINFO_INT_REGISTER + I386_CR2:			info->i = cpustate->cr[2];						break;
		case CPUINFO_INT_REGISTER + I386_CR3:			info->i = cpustate->cr[3];						break;
		case CPUINFO_INT_REGISTER + I386_CR4:			info->i = cpustate->cr[4];						break;
		case CPUINFO_INT_REGISTER + I386_DR0:			info->i = cpustate->dr[0];						break;
		case CPUINFO_INT_REGISTER + I386_DR1:			info->i = cpustate->dr[1];						break;
		case CPUINFO_INT_REGISTER + I386_DR2:			info->i = cpustate->dr[2];						break;
		case CPUINFO_INT_REGISTER + I386_DR3:			info->i = cpustate->dr[3];						break;
		case CPUINFO_INT_REGISTER + I386_DR4:			info->i = cpustate->dr[4];						break;
		case CPUINFO_INT_REGISTER + I386_DR5:			info->i = cpustate->dr[5];						break;
		case CPUINFO_INT_REGISTER + I386_DR6:			info->i = cpustate->dr[6];						break;
		case CPUINFO_INT_REGISTER + I386_DR7:			info->i = cpustate->dr[7];						break;
		case CPUINFO_INT_REGISTER + I386_TR6:			info->i = cpustate->tr[6];						break;
		case CPUINFO_INT_REGISTER + I386_TR7:			info->i = cpustate->tr[7];						break;
		case CPUINFO_INT_REGISTER + I386_GDTR_BASE:		info->i = cpustate->gdtr.base;					break;
		case CPUINFO_INT_REGISTER + I386_GDTR_LIMIT:	info->i = cpustate->gdtr.limit;					break;
		case CPUINFO_INT_REGISTER + I386_IDTR_BASE:		info->i = cpustate->idtr.base;					break;
		case CPUINFO_INT_REGISTER + I386_IDTR_LIMIT:	info->i = cpustate->idtr.limit;					break;
		case CPUINFO_INT_REGISTER + I386_TR:			info->i = cpustate->task.segment;				break;
		case CPUINFO_INT_REGISTER + I386_TR_BASE:		info->i = cpustate->task.base;					break;
		case CPUINFO_INT_REGISTER + I386_TR_LIMIT:		info->i = cpustate->task.limit;					break;
		case CPUINFO_INT_REGISTER + I386_TR_FLAGS:		info->i = cpustate->task.flags;					break;
		case CPUINFO_INT_REGISTER + I386_LDTR:			info->i = cpustate->ldtr.segment;				break;
		case CPUINFO_INT_REGISTER + I386_LDTR_BASE:		info->i = cpustate->ldtr.base;					break;
		case CPUINFO_INT_REGISTER + I386_LDTR_LIMIT:	info->i = cpustate->ldtr.limit;					break;
		case CPUINFO_INT_REGISTER + I386_LDTR_FLAGS:	info->i = cpustate->ldtr.flags;					break;

		/* --- the following bits of info are returned as pointers to data or functions --- */
		case CPUINFO_FCT_SET_INFO:	    				info->setinfo = CPU_SET_INFO_NAME(i386);			break;
		case CPUINFO_FCT_INIT:		    				info->init = CPU_INIT_NAME(i386);					break;
		case CPUINFO_FCT_RESET:		    				info->reset = CPU_RESET_NAME(i386);				break;
		case CPUINFO_FCT_EXECUTE:	    				info->execute = CPU_EXECUTE_NAME(i386);			break;
		case CPUINFO_FCT_BURN:		    				info->burn = NULL;						break;
		case CPUINFO_PTR_INSTRUCTION_COUNTER:			info->icount = &cpustate->cycles;				break;
		case CPUINFO_FCT_TRANSLATE:						info->translate = CPU_TRANSLATE_NAME(i386);	break;
		case CPUINFO_FCT_DISASSEMBLE:					info->disassemble = CPU_DISASSEMBLE_NAME(i386);			break;
		case CPUINFO_FCT_DEBUG_INIT:					info->debug_init = CPU_DEBUG_INIT_NAME(i386);	break;

		/* --- the following bits of info are returned as NULL-terminated strings --- */
		case DEVINFO_STR_NAME:							strcpy(info->s, "I386");				break;
		case DEVINFO_STR_FAMILY:					strcpy(info->s, "Intel 386");			break;
		case DEVINFO_STR_VERSION:					strcpy(info->s, "1.0");					break;
		case DEVINFO_STR_SOURCE_FILE:						strcpy(info->s, __FILE__);				break;
		case DEVINFO_STR_CREDITS:					strcpy(info->s, "Copyright Ville Linde"); break;

		case CPUINFO_STR_FLAGS:							sprintf(info->s, "%08X", get_flags(cpustate));	break;

		case CPUINFO_STR_REGISTER + I386_PC:			sprintf(info->s, "PC: %08X", cpustate->pc);		break;
		case CPUINFO_STR_REGISTER + I386_EIP:			sprintf(info->s, "EIP: %08X", cpustate->eip);	break;
		case CPUINFO_STR_REGISTER + I386_AL:			sprintf(info->s, "~AL: %02X", REG8(AL)); break;
		case CPUINFO_STR_REGISTER + I386_AH:			sprintf(info->s, "~AH: %02X", REG8(AH)); break;
		case CPUINFO_STR_REGISTER + I386_BL:			sprintf(info->s, "~BL: %02X", REG8(BL)); break;
		case CPUINFO_STR_REGISTER + I386_BH:			sprintf(info->s, "~BH: %02X", REG8(BH)); break;
		case CPUINFO_STR_REGISTER + I386_CL:			sprintf(info->s, "~CL: %02X", REG8(CL)); break;
		case CPUINFO_STR_REGISTER + I386_CH:			sprintf(info->s, "~CH: %02X", REG8(CH)); break;
		case CPUINFO_STR_REGISTER + I386_DL:			sprintf(info->s, "~DL: %02X", REG8(DL)); break;
		case CPUINFO_STR_REGISTER + I386_DH:			sprintf(info->s, "~DH: %02X", REG8(DH)); break;
		case CPUINFO_STR_REGISTER + I386_AX:			sprintf(info->s, "~AX: %04X", REG16(AX)); break;
		case CPUINFO_STR_REGISTER + I386_BX:			sprintf(info->s, "~BX: %04X", REG16(BX)); break;
		case CPUINFO_STR_REGISTER + I386_CX:			sprintf(info->s, "~CX: %04X", REG16(CX)); break;
		case CPUINFO_STR_REGISTER + I386_DX:			sprintf(info->s, "~DX: %04X", REG16(DX)); break;
		case CPUINFO_STR_REGISTER + I386_SI:			sprintf(info->s, "~SI: %04X", REG16(SI)); break;
		case CPUINFO_STR_REGISTER + I386_DI:			sprintf(info->s, "~DI: %04X", REG16(DI)); break;
		case CPUINFO_STR_REGISTER + I386_BP:			sprintf(info->s, "~BP: %04X", REG16(BP)); break;
		case CPUINFO_STR_REGISTER + I386_SP:			sprintf(info->s, "~SP: %04X", REG16(SP)); break;
		case CPUINFO_STR_REGISTER + I386_IP:			sprintf(info->s, "~IP: %04X", cpustate->eip & 0xFFFF); break;
		case CPUINFO_STR_REGISTER + I386_EAX:			sprintf(info->s, "EAX: %08X", cpustate->reg.d[EAX]); break;
		case CPUINFO_STR_REGISTER + I386_EBX:			sprintf(info->s, "EBX: %08X", cpustate->reg.d[EBX]); break;
		case CPUINFO_STR_REGISTER + I386_ECX:			sprintf(info->s, "ECX: %08X", cpustate->reg.d[ECX]); break;
		case CPUINFO_STR_REGISTER + I386_EDX:			sprintf(info->s, "EDX: %08X", cpustate->reg.d[EDX]); break;
		case CPUINFO_STR_REGISTER + I386_EBP:			sprintf(info->s, "EBP: %08X", cpustate->reg.d[EBP]); break;
		case CPUINFO_STR_REGISTER + I386_ESP:			sprintf(info->s, "ESP: %08X", cpustate->reg.d[ESP]); break;
		case CPUINFO_STR_REGISTER + I386_ESI:			sprintf(info->s, "ESI: %08X", cpustate->reg.d[ESI]); break;
		case CPUINFO_STR_REGISTER + I386_EDI:			sprintf(info->s, "EDI: %08X", cpustate->reg.d[EDI]); break;
		case CPUINFO_STR_REGISTER + I386_EFLAGS:		sprintf(info->s, "EFLAGS: %08X", cpustate->eflags); break;
		case CPUINFO_STR_REGISTER + I386_CS:			sprintf(info->s, "CS: %04X", cpustate->sreg[CS].selector); break;
		case CPUINFO_STR_REGISTER + I386_CS_BASE:		sprintf(info->s, "CSBASE: %08X", cpustate->sreg[CS].base); break;
		case CPUINFO_STR_REGISTER + I386_CS_LIMIT:		sprintf(info->s, "CSLIMIT: %08X", cpustate->sreg[CS].limit); break;
		case CPUINFO_STR_REGISTER + I386_CS_FLAGS:		sprintf(info->s, "CSFLAGS: %04X", cpustate->sreg[CS].flags); break;
		case CPUINFO_STR_REGISTER + I386_SS:			sprintf(info->s, "SS: %04X", cpustate->sreg[SS].selector); break;
		case CPUINFO_STR_REGISTER + I386_SS_BASE:		sprintf(info->s, "SSBASE: %08X", cpustate->sreg[SS].base); break;
		case CPUINFO_STR_REGISTER + I386_SS_LIMIT:		sprintf(info->s, "SSLIMIT: %08X", cpustate->sreg[SS].limit); break;
		case CPUINFO_STR_REGISTER + I386_SS_FLAGS:		sprintf(info->s, "SSFLAGS: %04X", cpustate->sreg[SS].flags); break;
		case CPUINFO_STR_REGISTER + I386_DS:			sprintf(info->s, "DS: %04X", cpustate->sreg[DS].selector); break;
		case CPUINFO_STR_REGISTER + I386_DS_BASE:		sprintf(info->s, "DSBASE: %08X", cpustate->sreg[DS].base); break;
		case CPUINFO_STR_REGISTER + I386_DS_LIMIT:		sprintf(info->s, "DSLIMIT: %08X", cpustate->sreg[DS].limit); break;
		case CPUINFO_STR_REGISTER + I386_DS_FLAGS:		sprintf(info->s, "DSFLAGS: %04X", cpustate->sreg[DS].flags); break;
		case CPUINFO_STR_REGISTER + I386_ES:			sprintf(info->s, "ES: %04X", cpustate->sreg[ES].selector); break;
		case CPUINFO_STR_REGISTER + I386_ES_BASE:		sprintf(info->s, "ESBASE: %08X", cpustate->sreg[ES].base); break;
		case CPUINFO_STR_REGISTER + I386_ES_LIMIT:		sprintf(info->s, "ESLIMIT: %08X", cpustate->sreg[ES].limit); break;
		case CPUINFO_STR_REGISTER + I386_ES_FLAGS:		sprintf(info->s, "ESFLAGS: %04X", cpustate->sreg[ES].flags); break;
		case CPUINFO_STR_REGISTER + I386_FS:			sprintf(info->s, "FS: %04X", cpustate->sreg[FS].selector); break;
		case CPUINFO_STR_REGISTER + I386_FS_BASE:		sprintf(info->s, "FSBASE: %08X", cpustate->sreg[FS].base); break;
		case CPUINFO_STR_REGISTER + I386_FS_LIMIT:		sprintf(info->s, "FSLIMIT: %08X", cpustate->sreg[FS].limit); break;
		case CPUINFO_STR_REGISTER + I386_FS_FLAGS:		sprintf(info->s, "FSFLAGS: %04X", cpustate->sreg[FS].flags); break;
		case CPUINFO_STR_REGISTER + I386_GS:			sprintf(info->s, "GS: %04X", cpustate->sreg[GS].selector); break;
		case CPUINFO_STR_REGISTER + I386_GS_BASE:		sprintf(info->s, "GSBASE: %08X", cpustate->sreg[GS].base); break;
		case CPUINFO_STR_REGISTER + I386_GS_LIMIT:		sprintf(info->s, "GSLIMIT: %08X", cpustate->sreg[GS].limit); break;
		case CPUINFO_STR_REGISTER + I386_GS_FLAGS:		sprintf(info->s, "GSFLAGS: %04X", cpustate->sreg[GS].flags); break;
		case CPUINFO_STR_REGISTER + I386_CR0:			sprintf(info->s, "CR0: %08X", cpustate->cr[0]); break;
		case CPUINFO_STR_REGISTER + I386_CR1:			sprintf(info->s, "CR1: %08X", cpustate->cr[1]); break;
		case CPUINFO_STR_REGISTER + I386_CR2:			sprintf(info->s, "CR2: %08X", cpustate->cr[2]); break;
		case CPUINFO_STR_REGISTER + I386_CR3:			sprintf(info->s, "CR3: %08X", cpustate->cr[3]); break;
		case CPUINFO_STR_REGISTER + I386_CR4:			sprintf(info->s, "CR4: %08X", cpustate->cr[4]); break;
		case CPUINFO_STR_REGISTER + I386_DR0:			sprintf(info->s, "DR0: %08X", cpustate->dr[0]); break;
		case CPUINFO_STR_REGISTER + I386_DR1:			sprintf(info->s, "DR1: %08X", cpustate->dr[1]); break;
		case CPUINFO_STR_REGISTER + I386_DR2:			sprintf(info->s, "DR2: %08X", cpustate->dr[2]); break;
		case CPUINFO_STR_REGISTER + I386_DR3:			sprintf(info->s, "DR3: %08X", cpustate->dr[3]); break;
		case CPUINFO_STR_REGISTER + I386_DR4:			sprintf(info->s, "DR4: %08X", cpustate->dr[4]); break;
		case CPUINFO_STR_REGISTER + I386_DR5:			sprintf(info->s, "DR5: %08X", cpustate->dr[5]); break;
		case CPUINFO_STR_REGISTER + I386_DR6:			sprintf(info->s, "DR6: %08X", cpustate->dr[6]); break;
		case CPUINFO_STR_REGISTER + I386_DR7:			sprintf(info->s, "DR7: %08X", cpustate->dr[7]); break;
		case CPUINFO_STR_REGISTER + I386_TR6:			sprintf(info->s, "TR6: %08X", cpustate->tr[6]); break;
		case CPUINFO_STR_REGISTER + I386_TR7:			sprintf(info->s, "TR7: %08X", cpustate->tr[7]); break;
		case CPUINFO_STR_REGISTER + I386_GDTR_BASE:		sprintf(info->s, "GDTRBASE: %08X", cpustate->gdtr.base); break;
		case CPUINFO_STR_REGISTER + I386_GDTR_LIMIT:	sprintf(info->s, "GDTRLIMIT: %04X", cpustate->gdtr.limit); break;
		case CPUINFO_STR_REGISTER + I386_IDTR_BASE:		sprintf(info->s, "IDTRBASE: %08X", cpustate->idtr.base); break;
		case CPUINFO_STR_REGISTER + I386_IDTR_LIMIT:	sprintf(info->s, "IDTRLIMIT: %04X", cpustate->idtr.limit); break;
		case CPUINFO_STR_REGISTER + I386_LDTR:			sprintf(info->s, "LDTR: %04X", cpustate->ldtr.segment); break;
		case CPUINFO_STR_REGISTER + I386_LDTR_BASE:		sprintf(info->s, "LDTRBASE: %08X", cpustate->ldtr.base); break;
		case CPUINFO_STR_REGISTER + I386_LDTR_LIMIT:	sprintf(info->s, "LDTRLIMIT: %08X", cpustate->ldtr.limit); break;
		case CPUINFO_STR_REGISTER + I386_LDTR_FLAGS:	sprintf(info->s, "LDTRFLAGS: %04X", cpustate->ldtr.flags); break;
		case CPUINFO_STR_REGISTER + I386_TR:			sprintf(info->s, "TR: %04X", cpustate->task.segment); break;
		case CPUINFO_STR_REGISTER + I386_TR_BASE:		sprintf(info->s, "TRBASE: %08X", cpustate->task.base); break;
		case CPUINFO_STR_REGISTER + I386_TR_LIMIT:		sprintf(info->s, "TRLIMIT: %08X", cpustate->task.limit); break;
		case CPUINFO_STR_REGISTER + I386_TR_FLAGS:		sprintf(info->s, "TRFLAGS: %04X", cpustate->task.flags); break;
		case CPUINFO_STR_REGISTER + I386_CPL:			sprintf(info->s, "CPL: %01X", cpustate->CPL); break;
	}
}

/*****************************************************************************/
/* Intel 486 */


static CPU_INIT( i486 )
{
	CPU_INIT_CALL(i386);
}

static CPU_RESET( i486 )
{
	i386_state *cpustate = get_safe_token(device);
	device_irq_callback save_irqcallback;

	save_irqcallback = cpustate->irq_callback;
	memset( cpustate, 0, sizeof(*cpustate) );
	cpustate->irq_callback = save_irqcallback;
	cpustate->device = device;
	cpustate->program = device->space(AS_PROGRAM);
	cpustate->direct = &cpustate->program->direct();
	cpustate->io = device->space(AS_IO);

	cpustate->sreg[CS].selector = 0xf000;
	cpustate->sreg[CS].base		= 0xffff0000;
	cpustate->sreg[CS].limit	= 0xffff;
	cpustate->sreg[CS].flags    = 0x009b;

	cpustate->sreg[DS].base = cpustate->sreg[ES].base = cpustate->sreg[FS].base = cpustate->sreg[GS].base = cpustate->sreg[SS].base = 0x00000000;
	cpustate->sreg[DS].limit = cpustate->sreg[ES].limit = cpustate->sreg[FS].limit = cpustate->sreg[GS].limit = cpustate->sreg[SS].limit = 0xffff;
	cpustate->sreg[DS].flags = cpustate->sreg[ES].flags = cpustate->sreg[FS].flags = cpustate->sreg[GS].flags = cpustate->sreg[SS].flags = 0x0092;

	cpustate->idtr.base = 0;
	cpustate->idtr.limit = 0x3ff;

	cpustate->a20_mask = ~0;

	cpustate->cr[0] = 0x00000010;
	cpustate->eflags = 0;
	cpustate->eflags_mask = 0x00070000;
	cpustate->eip = 0xfff0;

	// [11:8] Family
	// [ 7:4] Model
	// [ 3:0] Stepping ID
	// Family 4 (486), Model 0/1 (DX), Stepping 3
	REG32(EAX) = 0;
	REG32(EDX) = (4 << 8) | (0 << 4) | (3);

	build_opcode_table(cpustate, OP_I386 | OP_FPU | OP_I486);
	cpustate->cycle_table_rm = cycle_table_rm[CPU_CYCLES_I486];
	cpustate->cycle_table_pm = cycle_table_pm[CPU_CYCLES_I486];

	CHANGE_PC(cpustate,cpustate->eip);
}

static CPU_EXIT( i486 )
{
}

static CPU_SET_INFO( i486 )
{
	i386_state *cpustate = get_safe_token(device);
	switch (state)
	{
		case CPUINFO_INT_REGISTER + X87_CTRL:			cpustate->fpu_control_word = info->i;			break;
		case CPUINFO_INT_REGISTER + X87_STATUS:			cpustate->fpu_status_word = info->i;			break;
		case CPUINFO_INT_REGISTER + X87_ST0:			ST(0).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST1:			ST(1).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST2:			ST(2).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST3:			ST(3).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST4:			ST(4).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST5:			ST(5).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST6:			ST(6).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST7:			ST(7).f = info->i;						break;

		default:										CPU_SET_INFO_CALL(i386);				break;
	}
}

CPU_GET_INFO( i486 )
{
	i386_state *cpustate = (device != NULL && device->token() != NULL) ? get_safe_token(device) : NULL;
	switch (state)
	{
		case CPUINFO_FCT_SET_INFO:	    				info->setinfo = CPU_SET_INFO_NAME(i486);break;
		case CPUINFO_FCT_INIT:		    				info->init = CPU_INIT_NAME(i486);		break;
		case CPUINFO_FCT_RESET:		    				info->reset = CPU_RESET_NAME(i486);		break;
		case CPUINFO_FCT_EXIT:		    				info->exit = CPU_EXIT_NAME(i486);		break;

		case CPUINFO_INT_REGISTER + X87_CTRL:			info->i = cpustate->fpu_control_word;			break;
		case CPUINFO_INT_REGISTER + X87_STATUS:			info->i = cpustate->fpu_status_word;			break;
		case CPUINFO_INT_REGISTER + X87_ST0:			info->i = ST(0).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST1:			info->i = ST(1).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST2:			info->i = ST(2).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST3:			info->i = ST(3).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST4:			info->i = ST(4).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST5:			info->i = ST(5).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST6:			info->i = ST(6).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST7:			info->i = ST(7).f;						break;

		case DEVINFO_STR_NAME:							strcpy(info->s, "I486");				break;
		case DEVINFO_STR_FAMILY:					strcpy(info->s, "Intel 486");			break;
		case CPUINFO_STR_REGISTER + X87_CTRL:			sprintf(info->s, "FPU_CW: %04X", cpustate->fpu_control_word); break;
		case CPUINFO_STR_REGISTER + X87_STATUS:			sprintf(info->s, "FPU_SW: %04X", cpustate->fpu_status_word); break;
		case CPUINFO_STR_REGISTER + X87_ST0:			sprintf(info->s, "ST0: %f", ST(0).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST1:			sprintf(info->s, "ST1: %f", ST(1).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST2:			sprintf(info->s, "ST2: %f", ST(2).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST3:			sprintf(info->s, "ST3: %f", ST(3).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST4:			sprintf(info->s, "ST4: %f", ST(4).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST5:			sprintf(info->s, "ST5: %f", ST(5).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST6:			sprintf(info->s, "ST6: %f", ST(6).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST7:			sprintf(info->s, "ST7: %f", ST(7).f);	break;

		default:										CPU_GET_INFO_CALL(i386);				break;
	}
}

/*****************************************************************************/
/* Pentium */


static CPU_INIT( pentium )
{
	CPU_INIT_CALL(i386);
}

static CPU_RESET( pentium )
{
	i386_state *cpustate = get_safe_token(device);
	device_irq_callback save_irqcallback;

	save_irqcallback = cpustate->irq_callback;
	memset( cpustate, 0, sizeof(*cpustate) );
	cpustate->irq_callback = save_irqcallback;
	cpustate->device = device;
	cpustate->program = device->space(AS_PROGRAM);
	cpustate->direct = &cpustate->program->direct();
	cpustate->io = device->space(AS_IO);

	cpustate->sreg[CS].selector = 0xf000;
	cpustate->sreg[CS].base		= 0xffff0000;
	cpustate->sreg[CS].limit	= 0xffff;
	cpustate->sreg[CS].flags    = 0x009b;

	cpustate->sreg[DS].base = cpustate->sreg[ES].base = cpustate->sreg[FS].base = cpustate->sreg[GS].base = cpustate->sreg[SS].base = 0x00000000;
	cpustate->sreg[DS].limit = cpustate->sreg[ES].limit = cpustate->sreg[FS].limit = cpustate->sreg[GS].limit = cpustate->sreg[SS].limit = 0xffff;
	cpustate->sreg[DS].flags = cpustate->sreg[ES].flags = cpustate->sreg[FS].flags = cpustate->sreg[GS].flags = cpustate->sreg[SS].flags = 0x0092;

	cpustate->idtr.base = 0;
	cpustate->idtr.limit = 0x3ff;

	cpustate->a20_mask = ~0;

	cpustate->cr[0] = 0x00000010;
	cpustate->eflags = 0;
	cpustate->eflags_mask = 0x003b0000;
	cpustate->eip = 0xfff0;

	// [11:8] Family
	// [ 7:4] Model
	// [ 3:0] Stepping ID
	// Family 5 (Pentium), Model 2 (75 - 200MHz), Stepping 5
	REG32(EAX) = 0;
	REG32(EDX) = (5 << 8) | (2 << 4) | (5);

	build_opcode_table(cpustate, OP_I386 | OP_FPU | OP_I486 | OP_PENTIUM);
	cpustate->cycle_table_rm = cycle_table_rm[CPU_CYCLES_PENTIUM];
	cpustate->cycle_table_pm = cycle_table_pm[CPU_CYCLES_PENTIUM];

	cpustate->cpuid_id0 = 0x756e6547;	// Genu
	cpustate->cpuid_id1 = 0x49656e69;	// ineI
	cpustate->cpuid_id2 = 0x6c65746e;	// ntel

	cpustate->cpuid_max_input_value_eax = 0x01;
	cpustate->cpu_version = REG32(EDX);

	// [ 0:0] FPU on chip
	// [ 2:2] I/O breakpoints
	// [ 4:4] Time Stamp Counter
	// [ 5:5] Pentium CPU style model specific registers
	// [ 7:7] Machine Check Exception
	// [ 8:8] CMPXCHG8B instruction
	cpustate->feature_flags = 0x000001bf;

	CHANGE_PC(cpustate,cpustate->eip);
}

static CPU_EXIT( pentium )
{
}

static CPU_SET_INFO( pentium )
{
	i386_state *cpustate = get_safe_token(device);
	switch (state)
	{
		case CPUINFO_INT_REGISTER + X87_CTRL:			cpustate->fpu_control_word = info->i;			break;
		case CPUINFO_INT_REGISTER + X87_STATUS:			cpustate->fpu_status_word = info->i;			break;
		case CPUINFO_INT_REGISTER + X87_ST0:			ST(0).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST1:			ST(1).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST2:			ST(2).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST3:			ST(3).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST4:			ST(4).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST5:			ST(5).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST6:			ST(6).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST7:			ST(7).f = info->i;						break;

		default:										CPU_SET_INFO_CALL(i386);				break;
	}
}

CPU_GET_INFO( pentium )
{
	i386_state *cpustate = (device != NULL && device->token() != NULL) ? get_safe_token(device) : NULL;
	switch (state)
	{
		case CPUINFO_FCT_SET_INFO:	    				info->setinfo = CPU_SET_INFO_NAME(pentium);	break;
		case CPUINFO_FCT_INIT:		    				info->init = CPU_INIT_NAME(pentium);	break;
		case CPUINFO_FCT_RESET:		    				info->reset = CPU_RESET_NAME(pentium);	break;
		case CPUINFO_FCT_EXIT:		    				info->exit = CPU_EXIT_NAME(pentium);	break;

		case CPUINFO_INT_REGISTER + X87_CTRL:			info->i = cpustate->fpu_control_word;			break;
		case CPUINFO_INT_REGISTER + X87_STATUS:			info->i = cpustate->fpu_status_word;			break;
		case CPUINFO_INT_REGISTER + X87_ST0:			info->i = ST(0).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST1:			info->i = ST(1).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST2:			info->i = ST(2).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST3:			info->i = ST(3).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST4:			info->i = ST(4).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST5:			info->i = ST(5).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST6:			info->i = ST(6).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST7:			info->i = ST(7).f;						break;

		case DEVINFO_STR_NAME:							strcpy(info->s, "PENTIUM");				break;
		case DEVINFO_STR_FAMILY:					strcpy(info->s, "Intel Pentium");		break;
		case CPUINFO_STR_REGISTER + X87_CTRL:			sprintf(info->s, "FPU_CW: %04X", cpustate->fpu_control_word); break;
		case CPUINFO_STR_REGISTER + X87_STATUS:			sprintf(info->s, "FPU_SW: %04X", cpustate->fpu_status_word); break;
		case CPUINFO_STR_REGISTER + X87_ST0:			sprintf(info->s, "ST0: %f", ST(0).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST1:			sprintf(info->s, "ST1: %f", ST(1).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST2:			sprintf(info->s, "ST2: %f", ST(2).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST3:			sprintf(info->s, "ST3: %f", ST(3).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST4:			sprintf(info->s, "ST4: %f", ST(4).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST5:			sprintf(info->s, "ST5: %f", ST(5).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST6:			sprintf(info->s, "ST6: %f", ST(6).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST7:			sprintf(info->s, "ST7: %f", ST(7).f);	break;

		default:										CPU_GET_INFO_CALL(i386);				break;
	}
}

/*****************************************************************************/
/* Cyrix MediaGX */


static CPU_INIT( mediagx )
{
	CPU_INIT_CALL(i386);
}

static CPU_RESET( mediagx )
{
	i386_state *cpustate = get_safe_token(device);
	device_irq_callback save_irqcallback;

	save_irqcallback = cpustate->irq_callback;
	memset( cpustate, 0, sizeof(*cpustate) );
	cpustate->irq_callback = save_irqcallback;
	cpustate->device = device;
	cpustate->program = device->space(AS_PROGRAM);
	cpustate->direct = &cpustate->program->direct();
	cpustate->io = device->space(AS_IO);

	cpustate->sreg[CS].selector = 0xf000;
	cpustate->sreg[CS].base		= 0xffff0000;
	cpustate->sreg[CS].limit	= 0xffff;
	cpustate->sreg[CS].flags    = 0x009b;

	cpustate->sreg[DS].base = cpustate->sreg[ES].base = cpustate->sreg[FS].base = cpustate->sreg[GS].base = cpustate->sreg[SS].base = 0x00000000;
	cpustate->sreg[DS].limit = cpustate->sreg[ES].limit = cpustate->sreg[FS].limit = cpustate->sreg[GS].limit = cpustate->sreg[SS].limit = 0xffff;
	cpustate->sreg[DS].flags = cpustate->sreg[ES].flags = cpustate->sreg[FS].flags = cpustate->sreg[GS].flags = cpustate->sreg[SS].flags = 0x0092;

	cpustate->idtr.base = 0;
	cpustate->idtr.limit = 0x3ff;

	cpustate->a20_mask = ~0;

	cpustate->cr[0] = 0x00000010;
	cpustate->eflags = 0;
	cpustate->eflags_mask = 0x00270000; /* TODO: is this correct? */
	cpustate->eip = 0xfff0;

	// [11:8] Family
	// [ 7:4] Model
	// [ 3:0] Stepping ID
	// Family 4, Model 4 (MediaGX)
	REG32(EAX) = 0;
	REG32(EDX) = (4 << 8) | (4 << 4) | (1);	/* TODO: is this correct? */

	build_opcode_table(cpustate, OP_I386 | OP_FPU | OP_I486 | OP_PENTIUM | OP_CYRIX);
	cpustate->cycle_table_rm = cycle_table_rm[CPU_CYCLES_MEDIAGX];
	cpustate->cycle_table_pm = cycle_table_pm[CPU_CYCLES_MEDIAGX];

	cpustate->cpuid_id0 = 0x69727943;	// Cyri
	cpustate->cpuid_id1 = 0x736e4978;	// xIns
	cpustate->cpuid_id2 = 0x6d616574;	// tead

	cpustate->cpuid_max_input_value_eax = 0x01;
	cpustate->cpu_version = REG32(EDX);

	// [ 0:0] FPU on chip
	cpustate->feature_flags = 0x00000001;

	CHANGE_PC(cpustate,cpustate->eip);
}

static CPU_EXIT( mediagx )
{
}

static CPU_SET_INFO( mediagx )
{
	i386_state *cpustate = get_safe_token(device);
	switch (state)
	{
		case CPUINFO_INT_REGISTER + X87_CTRL:			cpustate->fpu_control_word = info->i;			break;
		case CPUINFO_INT_REGISTER + X87_STATUS:			cpustate->fpu_status_word = info->i;			break;
		case CPUINFO_INT_REGISTER + X87_ST0:			ST(0).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST1:			ST(1).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST2:			ST(2).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST3:			ST(3).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST4:			ST(4).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST5:			ST(5).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST6:			ST(6).f = info->i;						break;
		case CPUINFO_INT_REGISTER + X87_ST7:			ST(7).f = info->i;						break;

		default:										CPU_SET_INFO_CALL(i386);				break;
	}
}

CPU_GET_INFO( mediagx )
{
	i386_state *cpustate = (device != NULL && device->token() != NULL) ? get_safe_token(device) : NULL;
	switch (state)
	{
		case CPUINFO_FCT_SET_INFO:	    				info->setinfo = CPU_SET_INFO_NAME(mediagx);	break;
		case CPUINFO_FCT_INIT:		    				info->init = CPU_INIT_NAME(mediagx);	break;
		case CPUINFO_FCT_RESET:		    				info->reset = CPU_RESET_NAME(mediagx);	break;
		case CPUINFO_FCT_EXIT:		    				info->exit = CPU_EXIT_NAME(mediagx);	break;

		case CPUINFO_INT_REGISTER + X87_CTRL:			info->i = cpustate->fpu_control_word;			break;
		case CPUINFO_INT_REGISTER + X87_STATUS:			info->i = cpustate->fpu_status_word;			break;
		case CPUINFO_INT_REGISTER + X87_ST0:			info->i = ST(0).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST1:			info->i = ST(1).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST2:			info->i = ST(2).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST3:			info->i = ST(3).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST4:			info->i = ST(4).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST5:			info->i = ST(5).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST6:			info->i = ST(6).f;						break;
		case CPUINFO_INT_REGISTER + X87_ST7:			info->i = ST(7).f;						break;

		case DEVINFO_STR_NAME:							strcpy(info->s, "MEDIAGX");				break;
		case DEVINFO_STR_FAMILY:					strcpy(info->s, "Cyrix MediaGX");		break;
		case CPUINFO_STR_REGISTER + X87_CTRL:			sprintf(info->s, "FPU_CW: %04X", cpustate->fpu_control_word); break;
		case CPUINFO_STR_REGISTER + X87_STATUS:			sprintf(info->s, "FPU_SW: %04X", cpustate->fpu_status_word); break;
		case CPUINFO_STR_REGISTER + X87_ST0:			sprintf(info->s, "ST0: %f", ST(0).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST1:			sprintf(info->s, "ST1: %f", ST(1).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST2:			sprintf(info->s, "ST2: %f", ST(2).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST3:			sprintf(info->s, "ST3: %f", ST(3).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST4:			sprintf(info->s, "ST4: %f", ST(4).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST5:			sprintf(info->s, "ST5: %f", ST(5).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST6:			sprintf(info->s, "ST6: %f", ST(6).f);	break;
		case CPUINFO_STR_REGISTER + X87_ST7:			sprintf(info->s, "ST7: %f", ST(7).f);	break;

		default:										CPU_GET_INFO_CALL(i386);				break;
	}
}

DEFINE_LEGACY_CPU_DEVICE(I386, i386);
DEFINE_LEGACY_CPU_DEVICE(I486, i486);
DEFINE_LEGACY_CPU_DEVICE(PENTIUM, pentium);
DEFINE_LEGACY_CPU_DEVICE(MEDIAGX, mediagx);
