mirror of
https://github.com/reactos/reactos.git
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138 lines
5.4 KiB
C
138 lines
5.4 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: bios.h
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* PURPOSE: VDM BIOS Support Library
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* PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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#ifndef _BIOS_H_
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#define _BIOS_H_
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/* INCLUDES *******************************************************************/
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#include "ntvdm.h"
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#include "kbdbios.h"
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#include "vidbios.h"
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/* DEFINES ********************************************************************/
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#define BDA_SEGMENT 0x40
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#define BIOS_SEGMENT 0xF000
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// HACK: Disable FPU for now
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#define BIOS_EQUIPMENT_LIST 0x2C // Bit 2 set: Mouse present
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#pragma pack(push, 1)
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/*
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* BIOS Data Area at 0040:XXXX
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*
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* See: http://webpages.charter.net/danrollins/techhelp/0093.HTM
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* and: http://www.bioscentral.com/misc/bda.htm
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* for more information.
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*/
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typedef struct
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{
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WORD SerialPorts[4]; // 0x00
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WORD ParallelPorts[3]; // 0x08
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WORD EbdaSegment; // 0x0e - ParallelPort in PC/XT
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WORD EquipmentList; // 0x10
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BYTE Reserved0; // 0x12 - Errors in PCjr infrared keyboard link
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WORD MemorySize; // 0x13
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WORD Reserved1; // 0x15 - Scratch pad for manufacturing error tests
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WORD KeybdShiftFlags; // 0x17
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BYTE AlternateKeypad; // 0x19
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WORD KeybdBufferHead; // 0x1a
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WORD KeybdBufferTail; // 0x1c
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WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE]; // 0x1e
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BYTE DriveRecalibrate; // 0x3e
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BYTE DriveMotorStatus; // 0x3f
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BYTE MotorShutdownCounter; // 0x40
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BYTE LastDisketteOperation; // 0x41
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BYTE Reserved2[7]; // 0x42
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BYTE VideoMode; // 0x49
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WORD ScreenColumns; // 0x4a
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WORD VideoPageSize; // 0x4c
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WORD VideoPageOffset; // 0x4e
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WORD CursorPosition[BIOS_MAX_PAGES]; // 0x50
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BYTE CursorEndLine; // 0x60
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BYTE CursorStartLine; // 0x61
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BYTE VideoPage; // 0x62
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WORD CrtBasePort; // 0x63
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BYTE CrtModeControl; // 0x65
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BYTE CrtColorPaletteMask; // 0x66
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BYTE CassetteData[5]; // 0x67
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DWORD TickCounter; // 0x6c
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BYTE MidnightPassed; // 0x70
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BYTE BreakFlag; // 0x71
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WORD SoftReset; // 0x72
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BYTE LastDiskOperation; // 0x74
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BYTE NumDisks; // 0x75
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BYTE DriveControlByte; // 0x76
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BYTE DiskPortOffset; // 0x77
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BYTE LptTimeOut[4]; // 0x78
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BYTE ComTimeOut[4]; // 0x7c
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WORD KeybdBufferStart; // 0x80
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WORD KeybdBufferEnd; // 0x82
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BYTE ScreenRows; // 0x84
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WORD CharacterHeight; // 0x85
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BYTE VGAOptions; // 0x87
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BYTE VGASwitches; // 0x88
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BYTE VGAFlags[2]; // 0x89
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DWORD Reserved3; // 0x8b
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BYTE Reserved4; // 0x8f
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BYTE Reserved5[2]; // 0x90
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BYTE Reserved6[2]; // 0x92
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BYTE Reserved7[2]; // 0x94
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WORD Reserved8; // 0x96
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DWORD Reserved9; // 0x98
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DWORD Reserved10; // 0x9c
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DWORD Reserved11[2]; // 0xa0
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DWORD EGAPtr; // 0xa8
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BYTE Reserved12[68]; // 0xac
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BYTE Reserved13[16]; // 0xf0
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DWORD Reserved14; // 0x100
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BYTE Reserved15[12]; // 0x104
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BYTE Reserved16[17]; // 0x110
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BYTE Reserved17[15]; // 0x121
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BYTE Reserved18[3]; // 0x130
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} BIOS_DATA_AREA, *PBIOS_DATA_AREA;
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C_ASSERT(sizeof(BIOS_DATA_AREA) == 0x133);
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/*
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* BIOS Configuration Table at F000:E6F5 for 100% compatible BIOSes.
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*
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* See: http://www.ctyme.com/intr/rb-1594.htm
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* for more information.
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*/
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typedef struct _BIOS_CONFIG_TABLE
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{
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WORD Length; // 0x00
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BYTE Model; // 0x02
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BYTE SubModel; // 0x03
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BYTE Revision; // 0x04
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BYTE Feature[5]; // 0x05 -- 0x09
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// Other BIOSes may extend this table. We don't.
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} BIOS_CONFIG_TABLE, *PBIOS_CONFIG_TABLE;
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#pragma pack(pop)
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/* FUNCTIONS ******************************************************************/
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extern PBIOS_DATA_AREA Bda;
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extern PBIOS_CONFIG_TABLE Bct;
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VOID WINAPI BiosEquipmentService(LPWORD Stack);
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VOID WINAPI BiosGetMemorySize(LPWORD Stack);
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BOOLEAN
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BiosInitialize(IN LPCSTR BiosFileName);
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VOID
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BiosCleanup(VOID);
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#endif // _BIOS_H_
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/* EOF */
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