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5a3cc5df3c
Start to implement EmulatorSimulate / EmulatorUnsimulate (used by VDDSimulate16 and VDDUnsimualte16). This piece of code can be better written, but it works for what I'm going to commit next. svn path=/branches/ntvdm/; revision=62282
129 lines
3.3 KiB
C
129 lines
3.3 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
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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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#define STACK_VAR_B 0
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#define STACK_VAR_A 1
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#define STACK_COUNTER 2
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#define STACK_INT_NUM 3
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#define STACK_IP 4
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#define STACK_CS 5
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#define STACK_FLAGS 6
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/* Basic Memory Management */
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#define TO_LINEAR(seg, off) (((seg) << 4) + (off))
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#define MAX_SEGMENT 0xFFFF
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#define MAX_OFFSET 0xFFFF
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#define MAX_ADDRESS 0x1000000 // 16 MB of RAM
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#define FAR_POINTER(x) \
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(PVOID)((ULONG_PTR)BaseAddress + TO_LINEAR(HIWORD(x), LOWORD(x)))
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#define SEG_OFF_TO_PTR(seg, off) \
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(PVOID)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), (off)))
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/* BCD-Binary conversion */
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#define BINARY_TO_BCD(x) ((((x) / 1000) << 12) + (((x) / 100) << 8) + (((x) / 10) << 4) + ((x) % 10))
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#define BCD_TO_BINARY(x) (((x) >> 12) * 1000 + ((x) >> 8) * 100 + ((x) >> 4) * 10 + ((x) & 0x0F))
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/* System I/O ports */
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#define CONTROL_SYSTEM_PORT61H 0x61
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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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extern FAST486_STATE EmulatorContext;
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extern LPVOID BaseAddress;
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extern BOOLEAN VdmRunning;
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/* FUNCTIONS ******************************************************************/
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VOID WINAPI EmulatorReadMemory
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(
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PFAST486_STATE State,
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ULONG Address,
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PVOID Buffer,
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ULONG Size
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);
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VOID WINAPI EmulatorWriteMemory
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(
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PFAST486_STATE State,
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ULONG Address,
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PVOID Buffer,
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ULONG Size
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);
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UCHAR WINAPI EmulatorIntAcknowledge
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(
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PFAST486_STATE State
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);
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VOID EmulatorException(BYTE ExceptionNumber, LPWORD Stack);
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BOOLEAN EmulatorInitialize(HANDLE ConsoleInput, HANDLE ConsoleOutput);
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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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VOID EmulatorStep(VOID);
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VOID EmulatorSimulate(VOID);
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VOID EmulatorUnsimulate(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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