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08dc1d3e16
Make the BIOS Data Area accessible to other parts of ntvdm. Properly redirect read/write access to the console to the keyboard and VGA systems, respectively. svn path=/branches/ntvdm/; revision=59741
129 lines
3.3 KiB
C
129 lines
3.3 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 ROM_AREA_START 0xE0000
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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_PAGE_SIZE 0x1000
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#define BIOS_MAX_VIDEO_MODE 0x13
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#define DEFAULT_ATTRIBUTE 0x07
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#define GRAPHICS_VIDEO_SEG 0xA000
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#define TEXT_VIDEO_SEG 0xB800
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enum
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{
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SCROLL_DIRECTION_UP,
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SCROLL_DIRECTION_DOWN,
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SCROLL_DIRECTION_LEFT,
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SCROLL_DIRECTION_RIGHT
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};
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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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BYTE ScreenRows;
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WORD CharacterHeight;
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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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extern PBIOS_DATA_AREA Bda;
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BOOLEAN BiosInitialize(VOID);
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VOID BiosCleanup(VOID);
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BYTE BiosGetVideoMode(VOID);
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BOOLEAN BiosSetVideoMode(BYTE ModeNumber);
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WORD BiosPeekCharacter(VOID);
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WORD BiosGetCharacter(VOID);
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VOID BiosSetCursorPosition(BYTE Row, BYTE Column, BYTE Page);
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VOID BiosVideoService(LPWORD Stack);
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VOID BiosEquipmentService(LPWORD Stack);
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VOID BiosKeyboardService(LPWORD Stack);
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VOID BiosTimeService(LPWORD Stack);
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VOID BiosHandleIrq(BYTE IrqNumber, LPWORD Stack);
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VOID BiosSystemTimerInterrupt(LPWORD Stack);
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VOID BiosPrintCharacter(CHAR Character, BYTE Attribute, BYTE Page);
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BOOLEAN BiosScrollWindow(
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INT Direction,
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DWORD Amount,
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SMALL_RECT Rectangle,
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BYTE Page,
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BYTE FillAttribute
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);
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#endif // _BIOS_H_
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/* EOF */
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