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39a527a21e
BOP numbers are 1 byte and map to a function (over 255). But one can pass additional "parameters" to those functions by adding extra bytes, however such functions must advance "by hand" the instruction pointer. [NTVDM] - Take into account our previous remark for the BIOS interrupt stubs, and comment them. - Rework EmulatorBiosOperation (move almost all of its existing code into subfunctions in bop.c) so that one can call many other BOP functions in the future (WIP). The BOP number (still called) EMULATOR_INT_BOP (of value 0xFF) is used for internal 16 --> 32 bit switching for our 32bit bios. - It appears that the IoRead/WriteCallback and IdleCallback must not be NULL for using fast486. I'm committing a temporary fix that I will definitely fix in a subsequent commit. svn path=/branches/ntvdm/; revision=60812
150 lines
4 KiB
C
150 lines
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 (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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#define BDA_KBDFLAG_RSHIFT (1 << 0)
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#define BDA_KBDFLAG_LSHIFT (1 << 1)
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#define BDA_KBDFLAG_CTRL (1 << 2)
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#define BDA_KBDFLAG_ALT (1 << 3)
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#define BDA_KBDFLAG_SCROLL_ON (1 << 4)
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#define BDA_KBDFLAG_NUMLOCK_ON (1 << 5)
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#define BDA_KBDFLAG_CAPSLOCK_ON (1 << 6)
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#define BDA_KBDFLAG_INSERT_ON (1 << 7)
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#define BDA_KBDFLAG_RALT (1 << 8)
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#define BDA_KBDFLAG_LALT (1 << 9)
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#define BDA_KBDFLAG_SYSRQ (1 << 10)
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#define BDA_KBDFLAG_PAUSE (1 << 11)
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#define BDA_KBDFLAG_SCROLL (1 << 12)
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#define BDA_KBDFLAG_NUMLOCK (1 << 13)
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#define BDA_KBDFLAG_CAPSLOCK (1 << 14)
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#define BDA_KBDFLAG_INSERT (1 << 15)
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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; // Sometimes, ParallelPort
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WORD EquipmentList;
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BYTE Reserved0; // Errors in PCjr infrared keyboard link
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WORD MemorySize;
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WORD Reserved1; // Scratch pad for manufacturing error tests
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WORD KeybdShiftFlags;
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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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