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861776bd7e
- Introduce a Fast486Initialize which is used to set up the CPU callbacks (and use default ones if some of the given callbacks are NULL), and to reset it the first time. Now Fast486Reset is meant to be used for only resetting the CPU to a safe state. - Hence we are now sure that State->WhateverCallback is never NULL (and is theoretically valid), so don't do NULL-checks when calling them, but call them directly. The default cases for those checks become the default calls for the default callbacks. - Remove the now-unneeded EmulatorIdle function. svn path=/branches/ntvdm/; revision=60814
106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: emulator.h
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* PURPOSE: Minimal x86 machine emulator for the VDM (header file)
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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*/
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#ifndef _EMULATOR_H_
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#define _EMULATOR_H_
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/* INCLUDES *******************************************************************/
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#include "ntvdm.h"
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#include <fast486.h>
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/* DEFINES ********************************************************************/
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/* FLAGS */
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#define EMULATOR_FLAG_CF (1 << 0)
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#define EMULATOR_FLAG_PF (1 << 2)
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#define EMULATOR_FLAG_AF (1 << 4)
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#define EMULATOR_FLAG_ZF (1 << 6)
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#define EMULATOR_FLAG_SF (1 << 7)
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#define EMULATOR_FLAG_TF (1 << 8)
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#define EMULATOR_FLAG_IF (1 << 9)
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#define EMULATOR_FLAG_DF (1 << 10)
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#define EMULATOR_FLAG_OF (1 << 11)
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#define EMULATOR_FLAG_NT (1 << 14)
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#define EMULATOR_FLAG_RF (1 << 16)
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#define EMULATOR_FLAG_VM (1 << 17)
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#define EMULATOR_FLAG_AC (1 << 18)
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#define EMULATOR_FLAG_VIF (1 << 19)
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#define EMULATOR_FLAG_VIP (1 << 20)
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#define EMULATOR_FLAG_ID (1 << 21)
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/* Common definitions */
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#define EMULATOR_BOP 0xC4C4
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#define EMULATOR_INT_BOP 0xFF
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#define STACK_COUNTER 0
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#define STACK_INT_NUM 1
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#define STACK_IP 2
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#define STACK_CS 3
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#define STACK_FLAGS 4
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enum
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{
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EMULATOR_EXCEPTION_DIVISION_BY_ZERO,
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EMULATOR_EXCEPTION_DEBUG,
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EMULATOR_EXCEPTION_NMI,
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EMULATOR_EXCEPTION_BREAKPOINT,
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EMULATOR_EXCEPTION_OVERFLOW,
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EMULATOR_EXCEPTION_BOUND,
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EMULATOR_EXCEPTION_INVALID_OPCODE,
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EMULATOR_EXCEPTION_NO_FPU,
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EMULATOR_EXCEPTION_DOUBLE_FAULT,
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EMULATOR_EXCEPTION_FPU_SEGMENT,
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EMULATOR_EXCEPTION_INVALID_TSS,
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EMULATOR_EXCEPTION_NO_SEGMENT,
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EMULATOR_EXCEPTION_STACK_SEGMENT,
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EMULATOR_EXCEPTION_GPF,
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EMULATOR_EXCEPTION_PAGE_FAULT
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};
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enum
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{
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EMULATOR_REG_AX,
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EMULATOR_REG_CX,
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EMULATOR_REG_DX,
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EMULATOR_REG_BX,
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EMULATOR_REG_SP,
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EMULATOR_REG_BP,
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EMULATOR_REG_SI,
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EMULATOR_REG_DI,
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EMULATOR_REG_ES,
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EMULATOR_REG_CS,
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EMULATOR_REG_SS,
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EMULATOR_REG_DS,
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EMULATOR_REG_FS,
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EMULATOR_REG_GS
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};
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extern FAST486_STATE EmulatorContext;
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/* FUNCTIONS ******************************************************************/
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BOOLEAN EmulatorInitialize(VOID);
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VOID EmulatorSetStack(WORD Segment, DWORD Offset);
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VOID EmulatorExecute(WORD Segment, WORD Offset);
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VOID EmulatorInterrupt(BYTE Number);
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VOID EmulatorInterruptSignal(VOID);
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ULONG EmulatorGetRegister(ULONG Register);
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ULONG EmulatorGetProgramCounter(VOID);
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VOID EmulatorSetRegister(ULONG Register, ULONG Value);
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BOOLEAN EmulatorGetFlag(ULONG Flag);
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VOID EmulatorSetFlag(ULONG Flag);
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VOID EmulatorClearFlag(ULONG Flag);
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VOID EmulatorStep(VOID);
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VOID EmulatorCleanup(VOID);
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VOID EmulatorSetA20(BOOLEAN Enabled);
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#endif // _EMULATOR_H_
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/* EOF */
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