subsystems/ntvdm/bios.h

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            bios.h
   5  * PURPOSE:         VDM BIOS (header file)
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  */
   8
   9 #ifndef _BIOS_H_
  10 #define _BIOS_H_
  11
  12 /* INCLUDES *******************************************************************/
  13
  14 #include "ntvdm.h"
  15
  16 /* DEFINES ********************************************************************/
  17
  18 #define ROM_AREA_START 0xE0000
  19 #define ROM_AREA_END 0xFFFFF
  20 #define BDA_SEGMENT 0x40
  21 #define BIOS_PIC_MASTER_INT 0x08
  22 #define BIOS_PIC_SLAVE_INT 0x70
  23 #define BIOS_SEGMENT 0xF000
  24 #define BIOS_VIDEO_INTERRUPT 0x10
  25 #define BIOS_EQUIPMENT_INTERRUPT 0x11
  26 #define BIOS_KBD_INTERRUPT 0x16
  27 #define BIOS_TIME_INTERRUPT 0x1A
  28 #define BIOS_SYS_TIMER_INTERRUPT 0x1C
  29 #define CONSOLE_FONT_HEIGHT 8
  30 #define BIOS_KBD_BUFFER_SIZE 16
  31 #define BIOS_EQUIPMENT_LIST 0x2C // HACK: Disable FPU for now
  32 #define BIOS_DEFAULT_VIDEO_MODE 0x03
  33 #define BIOS_MAX_PAGES 8
  34 #define BIOS_PAGE_SIZE 0x1000
  35 #define BIOS_MAX_VIDEO_MODE 0x13
  36 #define DEFAULT_ATTRIBUTE 0x07
  37 #define GRAPHICS_VIDEO_SEG 0xA000
  38 #define TEXT_VIDEO_SEG 0xB800
  39
  40 enum
  41 {
  42     SCROLL_DIRECTION_UP,
  43     SCROLL_DIRECTION_DOWN,
  44     SCROLL_DIRECTION_LEFT,
  45     SCROLL_DIRECTION_RIGHT
  46 };
  47
  48 #pragma pack(push, 1)
  49
  50 typedef struct
  51 {
  52     WORD SerialPorts[4];
  53     WORD ParallelPorts[3];
  54     WORD EbdaSegment;
  55     WORD EquipmentList;
  56     BYTE Reserved0;
  57     WORD MemorySize;
  58     WORD Reserved1;
  59     WORD KeyboardFlags;
  60     BYTE AlternateKeypad;
  61     WORD KeybdBufferHead;
  62     WORD KeybdBufferTail;
  63     WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];
  64     BYTE DriveRecalibrate;
  65     BYTE DriveMotorStatus;
  66     BYTE MotorShutdownCounter;
  67     BYTE LastDisketteOperation;
  68     BYTE Reserved2[7];
  69     BYTE VideoMode;
  70     WORD ScreenColumns;
  71     WORD VideoPageSize;
  72     WORD VideoPageOffset;
  73     WORD CursorPosition[BIOS_MAX_PAGES];
  74     BYTE CursorEndLine;
  75     BYTE CursorStartLine;
  76     BYTE VideoPage;
  77     WORD CrtBasePort;
  78     BYTE CrtModeControl;
  79     BYTE CrtColorPaletteMask;
  80     DWORD Uptime;
  81     BYTE Reserved3;
  82     DWORD TickCounter;
  83     BYTE MidnightPassed;
  84     BYTE BreakFlag;
  85     WORD SoftReset;
  86     BYTE LastDiskOperation;
  87     BYTE NumDisks;
  88     BYTE DriveControlByte;
  89     BYTE DiskPortOffset;
  90     BYTE LptTimeOut[4];
  91     BYTE ComTimeOut[4];
  92     WORD KeybdBufferStart;
  93     WORD KeybdBufferEnd;
  94     BYTE ScreenRows;
  95     WORD CharacterHeight;
  96 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
  97
  98 #pragma pack(pop)
  99
 100 /* FUNCTIONS ******************************************************************/
 101
 102 extern PBIOS_DATA_AREA Bda;
 103
 104 BOOLEAN BiosInitialize(VOID);
 105 VOID BiosCleanup(VOID);
 106 BYTE BiosGetVideoMode(VOID);
 107 BOOLEAN BiosSetVideoMode(BYTE ModeNumber);
 108 WORD BiosPeekCharacter(VOID);
 109 WORD BiosGetCharacter(VOID);
 110 VOID BiosSetCursorPosition(BYTE Row, BYTE Column, BYTE Page);
 111 VOID BiosVideoService(LPWORD Stack);
 112 VOID BiosEquipmentService(LPWORD Stack);
 113 VOID BiosKeyboardService(LPWORD Stack);
 114 VOID BiosTimeService(LPWORD Stack);
 115 VOID BiosHandleIrq(BYTE IrqNumber, LPWORD Stack);
 116 VOID BiosSystemTimerInterrupt(LPWORD Stack);
 117 VOID BiosPrintCharacter(CHAR Character, BYTE Attribute, BYTE Page);
 118 BOOLEAN BiosScrollWindow(
 119     INT Direction,
 120     DWORD Amount,
 121     SMALL_RECT Rectangle,
 122     BYTE Page,
 123     BYTE FillAttribute
 124 );
 125
 126 #endif // _BIOS_H_
 127
 128 /* EOF */