2 * COPYRIGHT: GPL - See COPYING in the top level directory
3 * PROJECT: ReactOS Virtual DOS Machine
5 * PURPOSE: Header file to define commonly used stuff
6 * PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
9 /* INCLUDES *******************************************************************/
18 /* DEFINES ********************************************************************/
20 #define TO_LINEAR(seg, off) (((seg) << 4) + (off))
21 #define MAX_SEGMENT 0xFFFF
22 #define MAX_OFFSET 0xFFFF
23 #define MAX_ADDRESS TO_LINEAR(MAX_SEGMENT, MAX_OFFSET)
24 #define ROM_AREA_START 0xC0000
25 #define ROM_AREA_END 0xFFFFF
26 #define BIOS_PIC_MASTER_INT 0x08
27 #define BIOS_PIC_SLAVE_INT 0x70
28 #define BIOS_SEGMENT 0xF000
29 #define VIDEO_BIOS_INTERRUPT 0x10
30 #define SPECIAL_INT_NUM 0xFF
31 #define SEGMENT_TO_MCB(seg) ((PDOS_MCB)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
32 #define SEGMENT_TO_PSP(seg) ((PDOS_PSP)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
35 #define DOS_VERSION 0x0600
36 #define DOS_CONFIG_PATH L"%SystemRoot%\\system32\\CONFIG.NT"
37 #define DOS_COMMAND_INTERPRETER L"%SystemRoot%\\system32\\COMMAND.COM /k %SystemRoot%\\system32\\AUTOEXEC.NT"
38 #define FIRST_MCB_SEGMENT 0x1000
39 #define USER_MEMORY_SIZE 0x8FFFF
40 #define SYSTEM_PSP 0x08
41 #define SYSTEM_ENV_BLOCK 0x800
43 /* System console constants */
44 #define CONSOLE_FONT_HEIGHT 8
45 #define CONSOLE_VIDEO_MEM_START 0xB8000
46 #define CONSOLE_VIDEO_MEM_END 0xBFFFF
48 /* Programmable interval timer (PIT) */
49 #define PIT_CHANNELS 3
50 #define PIT_BASE_FREQUENCY 1193182LL
51 #define PIT_DATA_PORT(x) (0x40 + (x))
52 #define PIT_COMMAND_PORT 0x43
54 /* Programmable interrupt controller (PIC) */
55 #define PIC_MASTER_CMD 0x20
56 #define PIC_MASTER_DATA 0x21
57 #define PIC_SLAVE_CMD 0xA0
58 #define PIC_SLAVE_DATA 0xA1
60 #define PIC_ICW1_ICW4 (1 << 0)
61 #define PIC_ICW1_SINGLE (1 << 1)
62 #define PIC_ICW4_8086 (1 << 0)
63 #define PIC_ICW4_AEOI (1 << 1)
64 #define PIC_OCW2_NUM_MASK 0x07
65 #define PIC_OCW2_EOI (1 << 5)
66 #define PIC_OCW2_SL (1 << 6)
67 #define PIC_OCW3 (1 << 3)
68 #define PIC_OCW3_READ_ISR 0x0B
70 #define EMULATOR_FLAG_CF (1 << 0)
71 #define EMULATOR_FLAG_PF (1 << 2)
72 #define EMULATOR_FLAG_AF (1 << 4)
73 #define EMULATOR_FLAG_ZF (1 << 6)
74 #define EMULATOR_FLAG_SF (1 << 7)
75 #define EMULATOR_FLAG_TF (1 << 8)
76 #define EMULATOR_FLAG_IF (1 << 9)
77 #define EMULATOR_FLAG_DF (1 << 10)
78 #define EMULATOR_FLAG_OF (1 << 11)
79 #define EMULATOR_FLAG_NT (1 << 14)
80 #define EMULATOR_FLAG_RF (1 << 16)
81 #define EMULATOR_FLAG_VM (1 << 17)
82 #define EMULATOR_FLAG_AC (1 << 18)
83 #define EMULATOR_FLAG_VIF (1 << 19)
84 #define EMULATOR_FLAG_VIP (1 << 20)
85 #define EMULATOR_FLAG_ID (1 << 21)
105 #pragma pack(push, 1)
107 typedef struct _DOS_MCB
114 } DOS_MCB
, *PDOS_MCB
;
116 typedef struct _DOS_FCB
128 BYTE RecordNumber
[3];
129 } DOS_FCB
, *PDOS_FCB
;
131 typedef struct _DOS_PSP
136 DWORD TerminateAddress
;
138 DWORD CriticalAddress
;
140 BYTE HandleTable
[20];
143 WORD HandleTableSize
;
144 DWORD HandleTablePtr
;
152 BYTE CommandLineSize
;
153 CHAR CommandLine
[127];
154 } DOS_PSP
, *PDOS_PSP
;
156 typedef struct _DOS_SFT_ENTRY
162 DWORD DriveParamBlock
;
168 WORD LastClusterAccessed
;
175 } DOS_SFT_ENTRY
, *PDOS_SFT_ENTRY
;
177 typedef struct _DOS_SFT
181 DOS_SFT_ENTRY Entry
[ANYSIZE_ARRAY
];
182 } DOS_SFT
, *PDOS_SFT
;
184 typedef struct _DOS_INPUT_BUFFER
186 BYTE MaxLength
, Length
;
187 CHAR Buffer
[ANYSIZE_ARRAY
];
188 } DOS_INPUT_BUFFER
, *PDOS_INPUT_BUFFER
;
192 /* FUNCTIONS ******************************************************************/
194 extern LPVOID BaseAddress
;
195 extern BOOLEAN VdmRunning
;
196 extern LPCWSTR ExceptionName
[];
198 VOID
DisplayMessage(LPCWSTR Format
, ...);
199 BOOLEAN
BiosInitialize();
200 VOID
BiosUpdateConsole(ULONG StartAddress
, ULONG EndAddress
);
201 VOID
BiosPrintCharacter(CHAR Character
, BYTE Attribute
);
202 BOOLEAN
DosInitialize();
203 WORD
DosAllocateMemory(WORD Size
);
204 BOOLEAN
DosFreeMemory(WORD Segment
);
205 WORD
DosResizeMemory(WORD Segment
, WORD NewSize
);
206 BOOLEAN
DosCreateProcess(LPCSTR CommandLine
, WORD EnvBlock
);
207 VOID
DosInt20h(WORD CodeSegment
);
208 VOID
DosInt21h(WORD CodeSegment
);
209 VOID
DosBreakInterrupt();
210 VOID
BiosVideoService();
211 BYTE
PicReadCommand(BYTE Port
);
212 VOID
PicWriteCommand(BYTE Port
, BYTE Value
);
213 BYTE
PicReadData(BYTE Port
);
214 VOID
PicWriteData(BYTE Port
, BYTE Value
);
215 VOID
PicInterruptRequest(BYTE Number
);
216 VOID
EmulatorSetStack(WORD Segment
, WORD Offset
);
217 VOID
EmulatorExecute(WORD Segment
, WORD Offset
);
218 VOID
EmulatorInterrupt(BYTE Number
);
219 ULONG
EmulatorGetRegister(ULONG Register
);
220 VOID
EmulatorSetRegister(ULONG Register
, ULONG Value
);
221 VOID
EmulatorSetFlag(ULONG Flag
);
222 VOID
EmulatorClearFlag(ULONG Flag
);
223 BOOLEAN
EmulatorGetFlag(ULONG Flag
);
224 BOOLEAN
EmulatorInitialize();
226 VOID
EmulatorCleanup();