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 CONSOLE_VIDEO_MEM_END 0xBFFFF
  19 #define ROM_AREA_START 0xC0000
  20 #define ROM_AREA_END 0xFFFFF
  21 #define BDA_SEGMENT 0x40
  22 #define BIOS_PIC_MASTER_INT 0x08
  23 #define BIOS_PIC_SLAVE_INT 0x70
  24 #define BIOS_SEGMENT 0xF000
  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 #define CONSOLE_FONT_HEIGHT 8
  31 #define BIOS_KBD_BUFFER_SIZE 16
  32 #define BIOS_EQUIPMENT_LIST 0x2C // HACK: Disable FPU for now
  33 #define BIOS_DEFAULT_VIDEO_MODE 0x03
  34 #define BIOS_MAX_PAGES 8
  35 #define BIOS_MAX_VIDEO_MODE 0x13
  36
  37 typedef struct
  38 {
  39     DWORD Width;
  40     DWORD Height;
  41     BOOLEAN Text;
  42     BYTE Bpp;
  43     BOOLEAN Gray;
  44     BYTE Pages;
  45     WORD Segment;
  46 } VIDEO_MODE;
  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 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
  95
  96 #pragma pack(pop)
  97
  98 /* FUNCTIONS ******************************************************************/
  99
 100 BOOLEAN BiosInitialize();
 101 VOID BiosCleanup();
 102 VOID BiosUpdateConsole(ULONG StartAddress, ULONG EndAddress);
 103 VOID BiosUpdateVideoMemory(ULONG StartAddress, ULONG EndAddress);
 104 inline DWORD BiosGetVideoMemoryStart();
 105 inline VOID BiosVerticalRefresh();
 106 WORD BiosPeekCharacter();
 107 WORD BiosGetCharacter();
 108 VOID BiosVideoService();
 109 VOID BiosEquipmentService();
 110 VOID BiosKeyboardService();
 111 VOID BiosTimeService();
 112 VOID BiosHandleIrq(BYTE IrqNumber);
 113 VOID BiosSystemTimerInterrupt();
 114
 115 #endif