2 * COPYRIGHT: GPL - See COPYING in the top level directory
3 * PROJECT: ReactOS Virtual DOS Machine
5 * PURPOSE: Minimal x86 machine emulator for the VDM
6 * PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
12 /* INCLUDES *******************************************************************/
17 /* DEFINES ********************************************************************/
19 /* Basic Memory Management */
20 #define MEM_ALIGN_UP(ptr, align) MEM_ALIGN_DOWN((ULONG_PTR)(ptr) + (align) - 1l, (align))
21 #define MEM_ALIGN_DOWN(ptr, align) (PVOID)((ULONG_PTR)(ptr) & ~((align) - 1l))
23 #define TO_LINEAR(seg, off) (((seg) << 4) + (off))
24 #define MAX_SEGMENT 0xFFFF
25 #define MAX_OFFSET 0xFFFF
26 #define MAX_ADDRESS 0x1000000 // 16 MB of RAM
28 #define FAR_POINTER(x) \
29 (PVOID)((ULONG_PTR)BaseAddress + TO_LINEAR(HIWORD(x), LOWORD(x)))
31 #define SEG_OFF_TO_PTR(seg, off) \
32 (PVOID)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), (off)))
34 #define REAL_TO_PHYS(ptr) (PVOID)((ULONG_PTR)(ptr) + (ULONG_PTR)BaseAddress)
35 #define PHYS_TO_REAL(ptr) (PVOID)((ULONG_PTR)(ptr) - (ULONG_PTR)BaseAddress)
38 /* BCD-Binary conversion */
39 #define BINARY_TO_BCD(x) ((((x) / 1000) << 12) + (((x) / 100) << 8) + (((x) / 10) << 4) + ((x) % 10))
40 #define BCD_TO_BINARY(x) (((x) >> 12) * 1000 + ((x) >> 8) * 100 + ((x) >> 4) * 10 + ((x) & 0x0F))
43 /* System I/O ports */
44 #define CONTROL_SYSTEM_PORT61H 0x61
49 EMULATOR_EXCEPTION_DIVISION_BY_ZERO
,
50 EMULATOR_EXCEPTION_DEBUG
,
51 EMULATOR_EXCEPTION_NMI
,
52 EMULATOR_EXCEPTION_BREAKPOINT
,
53 EMULATOR_EXCEPTION_OVERFLOW
,
54 EMULATOR_EXCEPTION_BOUND
,
55 EMULATOR_EXCEPTION_INVALID_OPCODE
,
56 EMULATOR_EXCEPTION_NO_FPU
,
57 EMULATOR_EXCEPTION_DOUBLE_FAULT
,
58 EMULATOR_EXCEPTION_FPU_SEGMENT
,
59 EMULATOR_EXCEPTION_INVALID_TSS
,
60 EMULATOR_EXCEPTION_NO_SEGMENT
,
61 EMULATOR_EXCEPTION_STACK_SEGMENT
,
62 EMULATOR_EXCEPTION_GPF
,
63 EMULATOR_EXCEPTION_PAGE_FAULT
66 // extern FAST486_STATE EmulatorContext;
67 extern LPVOID BaseAddress
;
68 extern BOOLEAN VdmRunning
;
70 /* FUNCTIONS ******************************************************************/
72 VOID
DumpMemory(BOOLEAN TextFormat
);
74 VOID WINAPI EmulatorReadMemory
82 VOID WINAPI EmulatorWriteMemory
90 UCHAR WINAPI EmulatorIntAcknowledge
95 VOID
EmulatorException(BYTE ExceptionNumber
, LPWORD Stack
);
97 VOID
EmulatorTerminate(VOID
);
99 VOID
EmulatorInterrupt(BYTE Number
);
100 VOID
EmulatorInterruptSignal(VOID
);
101 VOID
EmulatorSetA20(BOOLEAN Enabled
);
103 BOOLEAN
EmulatorInitialize(HANDLE ConsoleInput
, HANDLE ConsoleOutput
);
104 VOID
EmulatorCleanup(VOID
);
106 #endif // _EMULATOR_H_