2 * COPYRIGHT: GPL - See COPYING in the top level directory
3 * PROJECT: ReactOS Virtual DOS Machine
5 * PURPOSE: VDM BIOS Support Library
6 * PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
12 /* INCLUDES *******************************************************************/
18 /* DEFINES ********************************************************************/
21 #define BOP_RESET 0x00 // Windows NTVDM (SoftPC) BIOS calls BOP 0x00
22 // to let the virtual machine initialize itself
23 // the IVT and its hardware.
24 #define BOP_EQUIPLIST 0x11
25 #define BOP_GETMEMSIZE 0x12
30 #define BDA_SEGMENT 0x40
31 #define BIOS_SEGMENT 0xF000
33 #define BIOS_EQUIPMENT_LIST 0x2E // Bit1: FPU, Bit 2: Mouse
38 * BIOS Data Area at 0040:XXXX
40 * See: http://webpages.charter.net/danrollins/techhelp/0093.HTM
41 * and: http://www.bioscentral.com/misc/bda.htm
42 * for more information.
46 WORD SerialPorts
[4]; // 0x00
47 WORD ParallelPorts
[3]; // 0x08
48 WORD EbdaSegment
; // 0x0e - ParallelPort in PC/XT
49 WORD EquipmentList
; // 0x10
50 BYTE Reserved0
; // 0x12 - Errors in PCjr infrared keyboard link
51 WORD MemorySize
; // 0x13
52 WORD Reserved1
; // 0x15 - Scratch pad for manufacturing error tests
53 WORD KeybdShiftFlags
; // 0x17
54 BYTE AlternateKeypad
; // 0x19
55 WORD KeybdBufferHead
; // 0x1a
56 WORD KeybdBufferTail
; // 0x1c
57 WORD KeybdBuffer
[BIOS_KBD_BUFFER_SIZE
]; // 0x1e
58 BYTE DriveRecalibrate
; // 0x3e
59 BYTE DriveMotorStatus
; // 0x3f
60 BYTE MotorShutdownCounter
; // 0x40
61 BYTE LastDisketteOperation
; // 0x41
62 BYTE Reserved2
[7]; // 0x42
63 BYTE VideoMode
; // 0x49
64 WORD ScreenColumns
; // 0x4a
65 WORD VideoPageSize
; // 0x4c
66 WORD VideoPageOffset
; // 0x4e
67 WORD CursorPosition
[BIOS_MAX_PAGES
]; // 0x50
68 BYTE CursorEndLine
; // 0x60
69 BYTE CursorStartLine
; // 0x61
70 BYTE VideoPage
; // 0x62
71 WORD CrtBasePort
; // 0x63
72 BYTE CrtModeControl
; // 0x65
73 BYTE CrtColorPaletteMask
; // 0x66
74 BYTE CassetteData
[5]; // 0x67
75 DWORD TickCounter
; // 0x6c
76 BYTE MidnightPassed
; // 0x70
77 BYTE BreakFlag
; // 0x71
78 WORD SoftReset
; // 0x72
79 BYTE LastDiskOperation
; // 0x74
80 BYTE NumDisks
; // 0x75
81 BYTE DriveControlByte
; // 0x76
82 BYTE DiskPortOffset
; // 0x77
83 BYTE LptTimeOut
[4]; // 0x78
84 BYTE ComTimeOut
[4]; // 0x7c
85 WORD KeybdBufferStart
; // 0x80
86 WORD KeybdBufferEnd
; // 0x82
87 BYTE ScreenRows
; // 0x84
88 WORD CharacterHeight
; // 0x85
89 BYTE VGAOptions
; // 0x87
90 BYTE VGASwitches
; // 0x88
91 BYTE VGAFlags
[2]; // 0x89
92 DWORD Reserved3
; // 0x8b
93 BYTE Reserved4
; // 0x8f
94 BYTE Reserved5
[2]; // 0x90
95 BYTE Reserved6
[2]; // 0x92
96 BYTE Reserved7
[2]; // 0x94
97 WORD KeybdStatusFlags
; // 0x96
98 DWORD Reserved9
; // 0x98
99 DWORD Reserved10
; // 0x9c
100 DWORD Reserved11
[2]; // 0xa0
101 DWORD EGAPtr
; // 0xa8
102 BYTE Reserved12
[68]; // 0xac
103 BYTE Reserved13
[16]; // 0xf0
105 DWORD Reserved14
; // 0x100
106 BYTE Reserved15
[12]; // 0x104
107 BYTE Reserved16
[17]; // 0x110
108 BYTE Reserved17
[15]; // 0x121
109 BYTE Reserved18
[3]; // 0x130
110 } BIOS_DATA_AREA
, *PBIOS_DATA_AREA
;
111 C_ASSERT(sizeof(BIOS_DATA_AREA
) == 0x133);
114 * BIOS Configuration Table at F000:E6F5 for 100% compatible BIOSes.
116 * See: http://www.ctyme.com/intr/rb-1594.htm
117 * for more information.
119 typedef struct _BIOS_CONFIG_TABLE
123 BYTE SubModel
; // 0x03
124 BYTE Revision
; // 0x04
125 BYTE Feature
[5]; // 0x05 -- 0x09
126 // Other BIOSes may extend this table. We don't.
127 } BIOS_CONFIG_TABLE
, *PBIOS_CONFIG_TABLE
;
131 /* FUNCTIONS ******************************************************************/
133 extern PBIOS_DATA_AREA Bda
;
134 extern PBIOS_CONFIG_TABLE Bct
;
136 VOID WINAPI
BiosEquipmentService(LPWORD Stack
);
137 VOID WINAPI
BiosGetMemorySize(LPWORD Stack
);
140 BiosInitialize(IN LPCSTR BiosFileName
);