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
  25 #define BIOS_VIDEO_INTERRUPT 0x10
  26 #define BIOS_EQUIPMENT_INTERRUPT 0x11
  27 #define BIOS_KBD_INTERRUPT 0x16
  28 #define BIOS_TIME_INTERRUPT 0x1A
  29 #define BIOS_SYS_TIMER_INTERRUPT 0x1C
  30
  31 #define CONSOLE_FONT_HEIGHT 8
  32 #define BIOS_KBD_BUFFER_SIZE 16
  33 #define BIOS_EQUIPMENT_LIST 0x2C // HACK: Disable FPU for now
  34 #define BIOS_DEFAULT_VIDEO_MODE 0x03
  35 #define BIOS_MAX_PAGES 8
  36 #define BIOS_PAGE_SIZE 0x1000
  37 #define BIOS_MAX_VIDEO_MODE 0x13
  38 #define DEFAULT_ATTRIBUTE 0x07
  39 #define GRAPHICS_VIDEO_SEG 0xA000
  40 #define TEXT_VIDEO_SEG 0xB800
  41
  42 #define BDA_KBDFLAG_RSHIFT      (1 << 0)
  43 #define BDA_KBDFLAG_LSHIFT      (1 << 1)
  44 #define BDA_KBDFLAG_CTRL        (1 << 2)
  45 #define BDA_KBDFLAG_ALT         (1 << 3)
  46 #define BDA_KBDFLAG_SCROLL_ON   (1 << 4)
  47 #define BDA_KBDFLAG_NUMLOCK_ON  (1 << 5)
  48 #define BDA_KBDFLAG_CAPSLOCK_ON (1 << 6)
  49 #define BDA_KBDFLAG_INSERT_ON   (1 << 7)
  50 #define BDA_KBDFLAG_RALT        (1 << 8)
  51 #define BDA_KBDFLAG_LALT        (1 << 9)
  52 #define BDA_KBDFLAG_SYSRQ       (1 << 10)
  53 #define BDA_KBDFLAG_PAUSE       (1 << 11)
  54 #define BDA_KBDFLAG_SCROLL      (1 << 12)
  55 #define BDA_KBDFLAG_NUMLOCK     (1 << 13)
  56 #define BDA_KBDFLAG_CAPSLOCK    (1 << 14)
  57 #define BDA_KBDFLAG_INSERT      (1 << 15)
  58
  59 enum
  60 {
  61     SCROLL_DIRECTION_UP,
  62     SCROLL_DIRECTION_DOWN,
  63     SCROLL_DIRECTION_LEFT,
  64     SCROLL_DIRECTION_RIGHT
  65 };
  66
  67 #pragma pack(push, 1)
  68
  69 typedef struct
  70 {
  71     WORD SerialPorts[4];
  72     WORD ParallelPorts[3];
  73     WORD EbdaSegment;       // Sometimes, ParallelPort
  74     WORD EquipmentList;
  75     BYTE Reserved0;         // Errors in PCjr infrared keyboard link
  76     WORD MemorySize;
  77     WORD Reserved1;         // Scratch pad for manufacturing error tests
  78     WORD KeybdShiftFlags;
  79     BYTE AlternateKeypad;
  80     WORD KeybdBufferHead;
  81     WORD KeybdBufferTail;
  82     WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];
  83     BYTE DriveRecalibrate;
  84     BYTE DriveMotorStatus;
  85     BYTE MotorShutdownCounter;
  86     BYTE LastDisketteOperation;
  87     BYTE Reserved2[7];
  88     BYTE VideoMode;
  89     WORD ScreenColumns;
  90     WORD VideoPageSize;
  91     WORD VideoPageOffset;
  92     WORD CursorPosition[BIOS_MAX_PAGES];
  93     BYTE CursorEndLine;
  94     BYTE CursorStartLine;
  95     BYTE VideoPage;
  96     WORD CrtBasePort;
  97     BYTE CrtModeControl;
  98     BYTE CrtColorPaletteMask;
  99     DWORD Uptime;
 100     BYTE Reserved3;
 101     DWORD TickCounter;
 102     BYTE MidnightPassed;
 103     BYTE BreakFlag;
 104     WORD SoftReset;
 105     BYTE LastDiskOperation;
 106     BYTE NumDisks;
 107     BYTE DriveControlByte;
 108     BYTE DiskPortOffset;
 109     BYTE LptTimeOut[4];
 110     BYTE ComTimeOut[4];
 111     WORD KeybdBufferStart;
 112     WORD KeybdBufferEnd;
 113     BYTE ScreenRows;
 114     WORD CharacterHeight;
 115 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
 116
 117 #pragma pack(pop)
 118
 119 /* FUNCTIONS ******************************************************************/
 120
 121 extern PBIOS_DATA_AREA Bda;
 122
 123 BOOLEAN BiosInitialize(VOID);
 124 VOID BiosCleanup(VOID);
 125 BYTE BiosGetVideoMode(VOID);
 126 BOOLEAN BiosSetVideoMode(BYTE ModeNumber);
 127 WORD BiosPeekCharacter(VOID);
 128 WORD BiosGetCharacter(VOID);
 129 VOID BiosSetCursorPosition(BYTE Row, BYTE Column, BYTE Page);
 130 VOID BiosVideoService(LPWORD Stack);
 131 VOID BiosEquipmentService(LPWORD Stack);
 132 VOID BiosKeyboardService(LPWORD Stack);
 133 VOID BiosTimeService(LPWORD Stack);
 134 VOID BiosHandleIrq(BYTE IrqNumber, LPWORD Stack);
 135 VOID BiosSystemTimerInterrupt(LPWORD Stack);
 136 VOID BiosPrintCharacter(CHAR Character, BYTE Attribute, BYTE Page);
 137 BOOLEAN BiosScrollWindow(
 138     INT Direction,
 139     DWORD Amount,
 140     SMALL_RECT Rectangle,
 141     BYTE Page,
 142     BYTE FillAttribute
 143 );
 144
 145 #endif // _BIOS_H_
 146
 147 /* EOF */