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
  21 #define BDA_SEGMENT     0x40
  22 #define BIOS_SEGMENT    0xF000
  23
  24 #define BIOS_PIC_MASTER_INT 0x08
  25 #define BIOS_PIC_SLAVE_INT  0x70
  26
  27 #define BIOS_VIDEO_INTERRUPT        0x10
  28 #define BIOS_EQUIPMENT_INTERRUPT    0x11
  29 #define BIOS_MEMORY_SIZE            0x12
  30 #define BIOS_MISC_INTERRUPT         0x15
  31 #define BIOS_KBD_INTERRUPT          0x16
  32 #define BIOS_TIME_INTERRUPT         0x1A
  33 #define BIOS_SYS_TIMER_INTERRUPT    0x1C
  34
  35 #define CONSOLE_FONT_HEIGHT 8
  36 #define BIOS_KBD_BUFFER_SIZE 16
  37 #define BIOS_EQUIPMENT_LIST 0x2C // HACK: Disable FPU for now
  38
  39 #define BIOS_DEFAULT_VIDEO_MODE 0x03
  40 #define BIOS_MAX_PAGES 8
  41 #define BIOS_PAGE_SIZE 0x1000
  42 #define BIOS_MAX_VIDEO_MODE 0x13
  43 #define DEFAULT_ATTRIBUTE   0x07
  44
  45 #define GRAPHICS_VIDEO_SEG  0xA000
  46 #define TEXT_VIDEO_SEG      0xB800
  47
  48 #define BDA_KBDFLAG_RSHIFT      (1 << 0)
  49 #define BDA_KBDFLAG_LSHIFT      (1 << 1)
  50 #define BDA_KBDFLAG_CTRL        (1 << 2)
  51 #define BDA_KBDFLAG_ALT         (1 << 3)
  52 #define BDA_KBDFLAG_SCROLL_ON   (1 << 4)
  53 #define BDA_KBDFLAG_NUMLOCK_ON  (1 << 5)
  54 #define BDA_KBDFLAG_CAPSLOCK_ON (1 << 6)
  55 #define BDA_KBDFLAG_INSERT_ON   (1 << 7)
  56 #define BDA_KBDFLAG_RALT        (1 << 8)
  57 #define BDA_KBDFLAG_LALT        (1 << 9)
  58 #define BDA_KBDFLAG_SYSRQ       (1 << 10)
  59 #define BDA_KBDFLAG_PAUSE       (1 << 11)
  60 #define BDA_KBDFLAG_SCROLL      (1 << 12)
  61 #define BDA_KBDFLAG_NUMLOCK     (1 << 13)
  62 #define BDA_KBDFLAG_CAPSLOCK    (1 << 14)
  63 #define BDA_KBDFLAG_INSERT      (1 << 15)
  64
  65 enum
  66 {
  67     SCROLL_DIRECTION_UP,
  68     SCROLL_DIRECTION_DOWN,
  69     SCROLL_DIRECTION_LEFT,
  70     SCROLL_DIRECTION_RIGHT
  71 };
  72
  73 /*
  74  * BIOS Data Area at 0040:XXXX
  75  *
  76  * See: http://webpages.charter.net/danrollins/techhelp/0093.HTM
  77  * and: http://www.bioscentral.com/misc/bda.htm
  78  * for more information.
  79  */
  80 #pragma pack(push, 1)
  81 typedef struct
  82 {
  83     WORD SerialPorts[4];                        // 0x00
  84     WORD ParallelPorts[3];                      // 0x08
  85     WORD EbdaSegment;                           // 0x0e - ParallelPort in PC/XT
  86     WORD EquipmentList;                         // 0x10
  87     BYTE Reserved0;                             // 0x12 - Errors in PCjr infrared keyboard link
  88     WORD MemorySize;                            // 0x13
  89     WORD Reserved1;                             // 0x15 - Scratch pad for manufacturing error tests
  90     WORD KeybdShiftFlags;                       // 0x17
  91     BYTE AlternateKeypad;                       // 0x19
  92     WORD KeybdBufferHead;                       // 0x1a
  93     WORD KeybdBufferTail;                       // 0x1c
  94     WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];     // 0x1e
  95     BYTE DriveRecalibrate;                      // 0x3e
  96     BYTE DriveMotorStatus;                      // 0x3f
  97     BYTE MotorShutdownCounter;                  // 0x40
  98     BYTE LastDisketteOperation;                 // 0x41
  99     BYTE Reserved2[7];                          // 0x42
 100     BYTE VideoMode;                             // 0x49
 101     WORD ScreenColumns;                         // 0x4a
 102     WORD VideoPageSize;                         // 0x4c
 103     WORD VideoPageOffset;                       // 0x4e
 104     WORD CursorPosition[BIOS_MAX_PAGES];        // 0x50
 105     BYTE CursorEndLine;                         // 0x60
 106     BYTE CursorStartLine;                       // 0x61
 107     BYTE VideoPage;                             // 0x62
 108     WORD CrtBasePort;                           // 0x63
 109     BYTE CrtModeControl;                        // 0x65
 110     BYTE CrtColorPaletteMask;                   // 0x66
 111     BYTE CassetteData[5];                       // 0x67
 112     DWORD TickCounter;                          // 0x6c
 113     BYTE MidnightPassed;                        // 0x70
 114     BYTE BreakFlag;                             // 0x71
 115     WORD SoftReset;                             // 0x72
 116     BYTE LastDiskOperation;                     // 0x74
 117     BYTE NumDisks;                              // 0x75
 118     BYTE DriveControlByte;                      // 0x76
 119     BYTE DiskPortOffset;                        // 0x77
 120     BYTE LptTimeOut[4];                         // 0x78
 121     BYTE ComTimeOut[4];                         // 0x7c
 122     WORD KeybdBufferStart;                      // 0x80
 123     WORD KeybdBufferEnd;                        // 0x82
 124     BYTE ScreenRows;                            // 0x84
 125     WORD CharacterHeight;                       // 0x85
 126     BYTE EGAFlags[2];                           // 0x87
 127     BYTE VGAFlags[2];                           // 0x89
 128     DWORD Reserved3;                            // 0x8b
 129     BYTE Reserved4;                             // 0x8f
 130     BYTE Reserved5[2];                          // 0x90
 131     BYTE Reserved6[2];                          // 0x92
 132     BYTE Reserved7[2];                          // 0x94
 133     WORD Reserved8;                             // 0x96
 134     DWORD Reserved9;                            // 0x98
 135     DWORD Reserved10;                           // 0x9c
 136     DWORD Reserved11[2];                        // 0xa0
 137     DWORD EGAPtr;                               // 0xa8
 138     BYTE Reserved12[68];                        // 0xac
 139     BYTE Reserved13[16];                        // 0xf0
 140
 141     DWORD Reserved14;                           // 0x100
 142     BYTE Reserved15[12];                        // 0x104
 143     BYTE Reserved16[17];                        // 0x110
 144     BYTE Reserved17[15];                        // 0x121
 145     BYTE Reserved18[3];                         // 0x130
 146 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
 147 #pragma pack(pop)
 148
 149 C_ASSERT(sizeof(BIOS_DATA_AREA) == 0x133);
 150
 151 /* FUNCTIONS ******************************************************************/
 152
 153 extern PBIOS_DATA_AREA Bda;
 154
 155 BOOLEAN BiosInitialize(VOID);
 156 VOID BiosCleanup(VOID);
 157 BYTE BiosGetVideoMode(VOID);
 158 BOOLEAN BiosSetVideoMode(BYTE ModeNumber);
 159 WORD BiosPeekCharacter(VOID);
 160 WORD BiosGetCharacter(VOID);
 161 VOID BiosGetCursorPosition(PBYTE Row, PBYTE Column, BYTE Page);
 162 VOID BiosSetCursorPosition(BYTE Row, BYTE Column, BYTE Page);
 163 VOID BiosPrintCharacter(CHAR Character, BYTE Attribute, BYTE Page);
 164 BOOLEAN BiosScrollWindow(
 165     INT Direction,
 166     DWORD Amount,
 167     SMALL_RECT Rectangle,
 168     BYTE Page,
 169     BYTE FillAttribute
 170 );
 171
 172 VOID WINAPI BiosVideoService(LPWORD Stack);
 173 VOID WINAPI BiosEquipmentService(LPWORD Stack);
 174 VOID WINAPI BiosGetMemorySize(LPWORD Stack);
 175 VOID WINAPI BiosMiscService(LPWORD Stack);
 176 VOID WINAPI BiosKeyboardService(LPWORD Stack);
 177 VOID WINAPI BiosTimeService(LPWORD Stack);
 178 VOID WINAPI BiosSystemTimerInterrupt(LPWORD Stack);
 179
 180 VOID BiosHandleIrq(BYTE IrqNumber, LPWORD Stack);
 181
 182 #endif // _BIOS_H_
 183
 184 /* EOF */