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
  22 #define BIOS_PIC_MASTER_INT 0x08
  23 #define BIOS_PIC_SLAVE_INT  0x70
  24
  25 #define BIOS_SEGMENT 0xF000
  26
  27 #define BIOS_VIDEO_INTERRUPT 0x10
  28 #define BIOS_EQUIPMENT_INTERRUPT 0x11
  29 #define BIOS_KBD_INTERRUPT 0x16
  30 #define BIOS_TIME_INTERRUPT 0x1A
  31 #define BIOS_SYS_TIMER_INTERRUPT 0x1C
  32
  33 #define CONSOLE_FONT_HEIGHT 8
  34 #define BIOS_KBD_BUFFER_SIZE 16
  35 #define BIOS_EQUIPMENT_LIST 0x2C // HACK: Disable FPU for now
  36 #define BIOS_DEFAULT_VIDEO_MODE 0x03
  37 #define BIOS_MAX_PAGES 8
  38 #define BIOS_PAGE_SIZE 0x1000
  39 #define BIOS_MAX_VIDEO_MODE 0x13
  40 #define DEFAULT_ATTRIBUTE 0x07
  41 #define GRAPHICS_VIDEO_SEG 0xA000
  42 #define TEXT_VIDEO_SEG 0xB800
  43
  44 #define BDA_KBDFLAG_RSHIFT      (1 << 0)
  45 #define BDA_KBDFLAG_LSHIFT      (1 << 1)
  46 #define BDA_KBDFLAG_CTRL        (1 << 2)
  47 #define BDA_KBDFLAG_ALT         (1 << 3)
  48 #define BDA_KBDFLAG_SCROLL_ON   (1 << 4)
  49 #define BDA_KBDFLAG_NUMLOCK_ON  (1 << 5)
  50 #define BDA_KBDFLAG_CAPSLOCK_ON (1 << 6)
  51 #define BDA_KBDFLAG_INSERT_ON   (1 << 7)
  52 #define BDA_KBDFLAG_RALT        (1 << 8)
  53 #define BDA_KBDFLAG_LALT        (1 << 9)
  54 #define BDA_KBDFLAG_SYSRQ       (1 << 10)
  55 #define BDA_KBDFLAG_PAUSE       (1 << 11)
  56 #define BDA_KBDFLAG_SCROLL      (1 << 12)
  57 #define BDA_KBDFLAG_NUMLOCK     (1 << 13)
  58 #define BDA_KBDFLAG_CAPSLOCK    (1 << 14)
  59 #define BDA_KBDFLAG_INSERT      (1 << 15)
  60
  61 enum
  62 {
  63     SCROLL_DIRECTION_UP,
  64     SCROLL_DIRECTION_DOWN,
  65     SCROLL_DIRECTION_LEFT,
  66     SCROLL_DIRECTION_RIGHT
  67 };
  68
  69 #pragma pack(push, 1)
  70
  71 typedef struct
  72 {
  73     WORD SerialPorts[4];
  74     WORD ParallelPorts[3];
  75     WORD EbdaSegment;       // Sometimes, ParallelPort
  76     WORD EquipmentList;
  77     BYTE Reserved0;         // Errors in PCjr infrared keyboard link
  78     WORD MemorySize;
  79     WORD Reserved1;         // Scratch pad for manufacturing error tests
  80     WORD KeybdShiftFlags;
  81     BYTE AlternateKeypad;
  82     WORD KeybdBufferHead;
  83     WORD KeybdBufferTail;
  84     WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];
  85     BYTE DriveRecalibrate;
  86     BYTE DriveMotorStatus;
  87     BYTE MotorShutdownCounter;
  88     BYTE LastDisketteOperation;
  89     BYTE Reserved2[7];
  90     BYTE VideoMode;
  91     WORD ScreenColumns;
  92     WORD VideoPageSize;
  93     WORD VideoPageOffset;
  94     WORD CursorPosition[BIOS_MAX_PAGES];
  95     BYTE CursorEndLine;
  96     BYTE CursorStartLine;
  97     BYTE VideoPage;
  98     WORD CrtBasePort;
  99     BYTE CrtModeControl;
 100     BYTE CrtColorPaletteMask;
 101     DWORD Uptime;
 102     BYTE Reserved3;
 103     DWORD TickCounter;
 104     BYTE MidnightPassed;
 105     BYTE BreakFlag;
 106     WORD SoftReset;
 107     BYTE LastDiskOperation;
 108     BYTE NumDisks;
 109     BYTE DriveControlByte;
 110     BYTE DiskPortOffset;
 111     BYTE LptTimeOut[4];
 112     BYTE ComTimeOut[4];
 113     WORD KeybdBufferStart;
 114     WORD KeybdBufferEnd;
 115     BYTE ScreenRows;
 116     WORD CharacterHeight;
 117 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
 118
 119 #pragma pack(pop)
 120
 121 /* FUNCTIONS ******************************************************************/
 122
 123 extern PBIOS_DATA_AREA Bda;
 124
 125 BOOLEAN BiosInitialize(VOID);
 126 VOID BiosCleanup(VOID);
 127 BYTE BiosGetVideoMode(VOID);
 128 BOOLEAN BiosSetVideoMode(BYTE ModeNumber);
 129 WORD BiosPeekCharacter(VOID);
 130 WORD BiosGetCharacter(VOID);
 131 VOID BiosSetCursorPosition(BYTE Row, BYTE Column, BYTE Page);
 132 VOID BiosVideoService(LPWORD Stack);
 133 VOID BiosEquipmentService(LPWORD Stack);
 134 VOID BiosKeyboardService(LPWORD Stack);
 135 VOID BiosTimeService(LPWORD Stack);
 136 VOID BiosHandleIrq(BYTE IrqNumber, LPWORD Stack);
 137 VOID BiosSystemTimerInterrupt(LPWORD Stack);
 138 VOID BiosPrintCharacter(CHAR Character, BYTE Attribute, BYTE Page);
 139 BOOLEAN BiosScrollWindow(
 140     INT Direction,
 141     DWORD Amount,
 142     SMALL_RECT Rectangle,
 143     BYTE Page,
 144     BYTE FillAttribute
 145 );
 146
 147 #endif // _BIOS_H_
 148
 149 /* EOF */