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40d639e7ff
Implement the Bios Data Area (BDA). Fix keyboard character translation bug. svn path=/branches/ntvdm/; revision=59489
115 lines
2.9 KiB
C
115 lines
2.9 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 (header file)
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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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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/* DEFINES ********************************************************************/
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#define CONSOLE_VIDEO_MEM_END 0xBFFFF
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#define ROM_AREA_START 0xC0000
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#define ROM_AREA_END 0xFFFFF
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#define BDA_SEGMENT 0x40
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#define BIOS_PIC_MASTER_INT 0x08
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#define BIOS_PIC_SLAVE_INT 0x70
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#define BIOS_SEGMENT 0xF000
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#define BIOS_VIDEO_INTERRUPT 0x10
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#define BIOS_EQUIPMENT_INTERRUPT 0x11
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#define BIOS_KBD_INTERRUPT 0x16
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#define BIOS_TIME_INTERRUPT 0x1A
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#define BIOS_SYS_TIMER_INTERRUPT 0x1C
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#define CONSOLE_FONT_HEIGHT 8
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#define BIOS_KBD_BUFFER_SIZE 16
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#define BIOS_EQUIPMENT_LIST 0x2C // HACK: Disable FPU for now
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#define BIOS_DEFAULT_VIDEO_MODE 0x03
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#define BIOS_MAX_PAGES 8
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#define BIOS_MAX_VIDEO_MODE 0x13
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typedef struct
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{
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DWORD Width;
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DWORD Height;
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BOOLEAN Text;
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BYTE Bpp;
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BOOLEAN Gray;
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BYTE Pages;
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WORD Segment;
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} VIDEO_MODE;
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#pragma pack(push, 1)
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typedef struct
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{
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WORD SerialPorts[4];
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WORD ParallelPorts[3];
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WORD EbdaSegment;
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WORD EquipmentList;
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BYTE Reserved0;
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WORD MemorySize;
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WORD Reserved1;
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WORD KeyboardFlags;
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BYTE AlternateKeypad;
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WORD KeybdBufferHead;
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WORD KeybdBufferTail;
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WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];
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BYTE DriveRecalibrate;
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BYTE DriveMotorStatus;
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BYTE MotorShutdownCounter;
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BYTE LastDisketteOperation;
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BYTE Reserved2[7];
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BYTE VideoMode;
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WORD ScreenColumns;
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WORD VideoPageSize;
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WORD VideoPageOffset;
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WORD CursorPosition[BIOS_MAX_PAGES];
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BYTE CursorEndLine;
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BYTE CursorStartLine;
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BYTE VideoPage;
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WORD CrtBasePort;
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BYTE CrtModeControl;
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BYTE CrtColorPaletteMask;
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DWORD Uptime;
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BYTE Reserved3;
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DWORD TickCounter;
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BYTE MidnightPassed;
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BYTE BreakFlag;
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WORD SoftReset;
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BYTE LastDiskOperation;
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BYTE NumDisks;
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BYTE DriveControlByte;
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BYTE DiskPortOffset;
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BYTE LptTimeOut[4];
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BYTE ComTimeOut[4];
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WORD KeybdBufferStart;
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WORD KeybdBufferEnd;
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} BIOS_DATA_AREA, *PBIOS_DATA_AREA;
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#pragma pack(pop)
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/* FUNCTIONS ******************************************************************/
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BOOLEAN BiosInitialize();
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VOID BiosCleanup();
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VOID BiosUpdateConsole(ULONG StartAddress, ULONG EndAddress);
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VOID BiosUpdateVideoMemory(ULONG StartAddress, ULONG EndAddress);
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inline DWORD BiosGetVideoMemoryStart();
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inline VOID BiosVerticalRefresh();
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WORD BiosPeekCharacter();
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WORD BiosGetCharacter();
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VOID BiosVideoService();
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VOID BiosEquipmentService();
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VOID BiosKeyboardService();
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VOID BiosTimeService();
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VOID BiosHandleIrq(BYTE IrqNumber);
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VOID BiosSystemTimerInterrupt();
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#endif
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