2 * COPYRIGHT: GPL - See COPYING in the top level directory
3 * PROJECT: ReactOS Virtual DOS Machine
4 * FILE: subsystems/mvdm/ntvdm/cpu/cpu.h
5 * PURPOSE: Minimal x86 machine emulator for the VDM
6 * PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
12 /* INCLUDES *******************************************************************/
16 /* DEFINES ********************************************************************/
19 #define EMULATOR_FLAG_CF (1 << 0)
20 #define EMULATOR_FLAG_PF (1 << 2)
21 #define EMULATOR_FLAG_AF (1 << 4)
22 #define EMULATOR_FLAG_ZF (1 << 6)
23 #define EMULATOR_FLAG_SF (1 << 7)
24 #define EMULATOR_FLAG_TF (1 << 8)
25 #define EMULATOR_FLAG_IF (1 << 9)
26 #define EMULATOR_FLAG_DF (1 << 10)
27 #define EMULATOR_FLAG_OF (1 << 11)
28 #define EMULATOR_FLAG_NT (1 << 14)
29 #define EMULATOR_FLAG_RF (1 << 16)
30 #define EMULATOR_FLAG_VM (1 << 17)
31 #define EMULATOR_FLAG_AC (1 << 18)
32 #define EMULATOR_FLAG_VIF (1 << 19)
33 #define EMULATOR_FLAG_VIP (1 << 20)
34 #define EMULATOR_FLAG_ID (1 << 21)
39 EMULATOR_EXCEPTION_DIVISION_BY_ZERO
,
40 EMULATOR_EXCEPTION_DEBUG
,
41 EMULATOR_EXCEPTION_NMI
,
42 EMULATOR_EXCEPTION_BREAKPOINT
,
43 EMULATOR_EXCEPTION_OVERFLOW
,
44 EMULATOR_EXCEPTION_BOUND
,
45 EMULATOR_EXCEPTION_INVALID_OPCODE
,
46 EMULATOR_EXCEPTION_NO_FPU
,
47 EMULATOR_EXCEPTION_DOUBLE_FAULT
,
48 EMULATOR_EXCEPTION_FPU_SEGMENT
,
49 EMULATOR_EXCEPTION_INVALID_TSS
,
50 EMULATOR_EXCEPTION_NO_SEGMENT
,
51 EMULATOR_EXCEPTION_STACK_SEGMENT
,
52 EMULATOR_EXCEPTION_GPF
,
53 EMULATOR_EXCEPTION_PAGE_FAULT
57 extern BOOLEAN CpuRunning
;
58 extern FAST486_STATE EmulatorContext
;
60 /* FUNCTIONS ******************************************************************/
63 VOID
EmulatorException(BYTE ExceptionNumber
, LPWORD Stack
);
66 VOID
CpuExecute(WORD Segment
, WORD Offset
);
68 VOID
CpuSimulate(VOID
);
69 VOID
CpuUnsimulate(VOID
);
71 VOID
EmulatorTerminate(VOID
);
74 BOOLEAN
CpuInitialize(VOID
);
75 VOID
CpuCleanup(VOID
);