2 * COPYRIGHT: GPL - See COPYING in the top level directory
3 * PROJECT: ReactOS Virtual DOS Machine
5 * PURPOSE: VDM BIOS (header file)
6 * PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
12 /* INCLUDES *******************************************************************/
16 /* DEFINES ********************************************************************/
18 #define ROM_AREA_START 0xE0000
19 #define ROM_AREA_END 0xFFFFF
21 #define BDA_SEGMENT 0x40
22 #define BIOS_SEGMENT 0xF000
24 #define BIOS_PIC_MASTER_INT 0x08
25 #define BIOS_PIC_SLAVE_INT 0x70
27 #define BIOS_VIDEO_INTERRUPT 0x10
28 #define BIOS_EQUIPMENT_INTERRUPT 0x11
29 #define BIOS_MEMORY_SIZE 0x12
30 #define BIOS_KBD_INTERRUPT 0x16
31 #define BIOS_TIME_INTERRUPT 0x1A
32 #define BIOS_SYS_TIMER_INTERRUPT 0x1C
34 #define CONSOLE_FONT_HEIGHT 8
35 #define BIOS_KBD_BUFFER_SIZE 16
36 #define BIOS_EQUIPMENT_LIST 0x2C // HACK: Disable FPU for now
37 #define BIOS_DEFAULT_VIDEO_MODE 0x03
38 #define BIOS_MAX_PAGES 8
39 #define BIOS_PAGE_SIZE 0x1000
40 #define BIOS_MAX_VIDEO_MODE 0x13
41 #define DEFAULT_ATTRIBUTE 0x07
42 #define GRAPHICS_VIDEO_SEG 0xA000
43 #define TEXT_VIDEO_SEG 0xB800
45 #define BDA_KBDFLAG_RSHIFT (1 << 0)
46 #define BDA_KBDFLAG_LSHIFT (1 << 1)
47 #define BDA_KBDFLAG_CTRL (1 << 2)
48 #define BDA_KBDFLAG_ALT (1 << 3)
49 #define BDA_KBDFLAG_SCROLL_ON (1 << 4)
50 #define BDA_KBDFLAG_NUMLOCK_ON (1 << 5)
51 #define BDA_KBDFLAG_CAPSLOCK_ON (1 << 6)
52 #define BDA_KBDFLAG_INSERT_ON (1 << 7)
53 #define BDA_KBDFLAG_RALT (1 << 8)
54 #define BDA_KBDFLAG_LALT (1 << 9)
55 #define BDA_KBDFLAG_SYSRQ (1 << 10)
56 #define BDA_KBDFLAG_PAUSE (1 << 11)
57 #define BDA_KBDFLAG_SCROLL (1 << 12)
58 #define BDA_KBDFLAG_NUMLOCK (1 << 13)
59 #define BDA_KBDFLAG_CAPSLOCK (1 << 14)
60 #define BDA_KBDFLAG_INSERT (1 << 15)
65 SCROLL_DIRECTION_DOWN
,
66 SCROLL_DIRECTION_LEFT
,
67 SCROLL_DIRECTION_RIGHT
73 * BIOS Data Area at 0040:XXXX
75 * See: http://webpages.charter.net/danrollins/techhelp/0093.HTM
76 * and: http://www.bioscentral.com/misc/bda.htm
77 * for more information.
81 WORD SerialPorts
[4]; // 0x00
82 WORD ParallelPorts
[3]; // 0x08
83 WORD EbdaSegment
; // 0x0e - ParallelPort in PC/XT
84 WORD EquipmentList
; // 0x10
85 BYTE Reserved0
; // 0x12 - Errors in PCjr infrared keyboard link
86 WORD MemorySize
; // 0x13
87 WORD Reserved1
; // 0x15 - Scratch pad for manufacturing error tests
88 WORD KeybdShiftFlags
; // 0x17
89 BYTE AlternateKeypad
; // 0x19
90 WORD KeybdBufferHead
; // 0x1a
91 WORD KeybdBufferTail
; // 0x1c
92 WORD KeybdBuffer
[BIOS_KBD_BUFFER_SIZE
]; // 0x1e
93 BYTE DriveRecalibrate
; // 0x3e
94 BYTE DriveMotorStatus
; // 0x3f
95 BYTE MotorShutdownCounter
; // 0x40
96 BYTE LastDisketteOperation
; // 0x41
97 BYTE Reserved2
[7]; // 0x42
98 BYTE VideoMode
; // 0x49
99 WORD ScreenColumns
; // 0x4a
100 WORD VideoPageSize
; // 0x4c
101 WORD VideoPageOffset
; // 0x4e
102 WORD CursorPosition
[BIOS_MAX_PAGES
]; // 0x50
103 BYTE CursorEndLine
; // 0x60
104 BYTE CursorStartLine
; // 0x61
105 BYTE VideoPage
; // 0x62
106 WORD CrtBasePort
; // 0x63
107 BYTE CrtModeControl
; // 0x65
108 BYTE CrtColorPaletteMask
; // 0x66
109 BYTE CassetteData
[5]; // 0x67
110 DWORD TickCounter
; // 0x6c
111 BYTE MidnightPassed
; // 0x70
112 BYTE BreakFlag
; // 0x71
113 WORD SoftReset
; // 0x72
114 BYTE LastDiskOperation
; // 0x74
115 BYTE NumDisks
; // 0x75
116 BYTE DriveControlByte
; // 0x76
117 BYTE DiskPortOffset
; // 0x77
118 BYTE LptTimeOut
[4]; // 0x78
119 BYTE ComTimeOut
[4]; // 0x7c
120 WORD KeybdBufferStart
; // 0x80
121 WORD KeybdBufferEnd
; // 0x82
122 BYTE ScreenRows
; // 0x84
123 WORD CharacterHeight
; // 0x85
124 BYTE EGAFlags
[2]; // 0x87
125 BYTE VGAFlags
[2]; // 0x89
126 DWORD Reserved3
; // 0x8b
127 BYTE Reserved4
; // 0x8f
128 BYTE Reserved5
[2]; // 0x90
129 BYTE Reserved6
[2]; // 0x92
130 BYTE Reserved7
[2]; // 0x94
131 WORD Reserved8
; // 0x96
132 DWORD Reserved9
; // 0x98
133 DWORD Reserved10
; // 0x9c
134 DWORD Reserved11
[2]; // 0xa0
135 DWORD EGAPtr
; // 0xa8
136 BYTE Reserved12
[68]; // 0xac
137 BYTE Reserved13
[16]; // 0xf0
139 DWORD Reserved14
; // 0x100
140 BYTE Reserved15
[12]; // 0x104
141 BYTE Reserved16
[17]; // 0x110
142 BYTE Reserved17
[15]; // 0x121
143 BYTE Reserved18
[3]; // 0x130
144 } BIOS_DATA_AREA
, *PBIOS_DATA_AREA
;
146 C_ASSERT(sizeof(BIOS_DATA_AREA
) == 0x133);
150 /* FUNCTIONS ******************************************************************/
152 extern PBIOS_DATA_AREA Bda
;
154 BOOLEAN
BiosInitialize(VOID
);
155 VOID
BiosCleanup(VOID
);
156 BYTE
BiosGetVideoMode(VOID
);
157 BOOLEAN
BiosSetVideoMode(BYTE ModeNumber
);
158 WORD
BiosPeekCharacter(VOID
);
159 WORD
BiosGetCharacter(VOID
);
160 VOID
BiosGetCursorPosition(PBYTE Row
, PBYTE Column
, BYTE Page
);
161 VOID
BiosSetCursorPosition(BYTE Row
, BYTE Column
, BYTE Page
);
162 VOID
BiosPrintCharacter(CHAR Character
, BYTE Attribute
, BYTE Page
);
163 BOOLEAN
BiosScrollWindow(
166 SMALL_RECT Rectangle
,
171 VOID WINAPI
BiosVideoService(LPWORD Stack
);
172 VOID WINAPI
BiosEquipmentService(LPWORD Stack
);
173 VOID WINAPI
BiosGetMemorySize(LPWORD Stack
);
174 VOID WINAPI
BiosKeyboardService(LPWORD Stack
);
175 VOID WINAPI
BiosTimeService(LPWORD Stack
);
176 VOID WINAPI
BiosSystemTimerInterrupt(LPWORD Stack
);
178 VOID
BiosHandleIrq(BYTE IrqNumber
, LPWORD Stack
);