reactos/subsystems/ntvdm/bios/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 Support Library
   6  * PROGRAMMERS:     Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   7  */
   8
   9 #ifndef _BIOS_H_
  10 #define _BIOS_H_
  11
  12 /* INCLUDES *******************************************************************/
  13
  14 #include "ntvdm.h"
  15 #include "kbdbios.h"
  16 #include "vidbios.h"
  17
  18 /* DEFINES ********************************************************************/
  19
  20 #define BDA_SEGMENT     0x40
  21 #define BIOS_SEGMENT    0xF000
  22
  23 #define BIOS_EQUIPMENT_LIST     0x2C // HACK: Disable FPU for now
  24
  25 /*
  26  * BIOS Data Area at 0040:XXXX
  27  *
  28  * See: http://webpages.charter.net/danrollins/techhelp/0093.HTM
  29  * and: http://www.bioscentral.com/misc/bda.htm
  30  * for more information.
  31  */
  32 #pragma pack(push, 1)
  33 typedef struct
  34 {
  35     WORD SerialPorts[4];                        // 0x00
  36     WORD ParallelPorts[3];                      // 0x08
  37     WORD EbdaSegment;                           // 0x0e - ParallelPort in PC/XT
  38     WORD EquipmentList;                         // 0x10
  39     BYTE Reserved0;                             // 0x12 - Errors in PCjr infrared keyboard link
  40     WORD MemorySize;                            // 0x13
  41     WORD Reserved1;                             // 0x15 - Scratch pad for manufacturing error tests
  42     WORD KeybdShiftFlags;                       // 0x17
  43     BYTE AlternateKeypad;                       // 0x19
  44     WORD KeybdBufferHead;                       // 0x1a
  45     WORD KeybdBufferTail;                       // 0x1c
  46     WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];     // 0x1e
  47     BYTE DriveRecalibrate;                      // 0x3e
  48     BYTE DriveMotorStatus;                      // 0x3f
  49     BYTE MotorShutdownCounter;                  // 0x40
  50     BYTE LastDisketteOperation;                 // 0x41
  51     BYTE Reserved2[7];                          // 0x42
  52     BYTE VideoMode;                             // 0x49
  53     WORD ScreenColumns;                         // 0x4a
  54     WORD VideoPageSize;                         // 0x4c
  55     WORD VideoPageOffset;                       // 0x4e
  56     WORD CursorPosition[BIOS_MAX_PAGES];        // 0x50
  57     BYTE CursorEndLine;                         // 0x60
  58     BYTE CursorStartLine;                       // 0x61
  59     BYTE VideoPage;                             // 0x62
  60     WORD CrtBasePort;                           // 0x63
  61     BYTE CrtModeControl;                        // 0x65
  62     BYTE CrtColorPaletteMask;                   // 0x66
  63     BYTE CassetteData[5];                       // 0x67
  64     DWORD TickCounter;                          // 0x6c
  65     BYTE MidnightPassed;                        // 0x70
  66     BYTE BreakFlag;                             // 0x71
  67     WORD SoftReset;                             // 0x72
  68     BYTE LastDiskOperation;                     // 0x74
  69     BYTE NumDisks;                              // 0x75
  70     BYTE DriveControlByte;                      // 0x76
  71     BYTE DiskPortOffset;                        // 0x77
  72     BYTE LptTimeOut[4];                         // 0x78
  73     BYTE ComTimeOut[4];                         // 0x7c
  74     WORD KeybdBufferStart;                      // 0x80
  75     WORD KeybdBufferEnd;                        // 0x82
  76     BYTE ScreenRows;                            // 0x84
  77     WORD CharacterHeight;                       // 0x85
  78     BYTE EGAFlags[2];                           // 0x87
  79     BYTE VGAFlags[2];                           // 0x89
  80     DWORD Reserved3;                            // 0x8b
  81     BYTE Reserved4;                             // 0x8f
  82     BYTE Reserved5[2];                          // 0x90
  83     BYTE Reserved6[2];                          // 0x92
  84     BYTE Reserved7[2];                          // 0x94
  85     WORD Reserved8;                             // 0x96
  86     DWORD Reserved9;                            // 0x98
  87     DWORD Reserved10;                           // 0x9c
  88     DWORD Reserved11[2];                        // 0xa0
  89     DWORD EGAPtr;                               // 0xa8
  90     BYTE Reserved12[68];                        // 0xac
  91     BYTE Reserved13[16];                        // 0xf0
  92
  93     DWORD Reserved14;                           // 0x100
  94     BYTE Reserved15[12];                        // 0x104
  95     BYTE Reserved16[17];                        // 0x110
  96     BYTE Reserved17[15];                        // 0x121
  97     BYTE Reserved18[3];                         // 0x130
  98 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
  99 #pragma pack(pop)
 100
 101 C_ASSERT(sizeof(BIOS_DATA_AREA) == 0x133);
 102
 103 /* FUNCTIONS ******************************************************************/
 104
 105 extern PBIOS_DATA_AREA Bda;
 106
 107 VOID WINAPI BiosEquipmentService(LPWORD Stack);
 108 VOID WINAPI BiosGetMemorySize(LPWORD Stack);
 109
 110 BOOLEAN
 111 BiosInitialize(IN LPCSTR BiosFileName);
 112
 113 VOID
 114 BiosCleanup(VOID);
 115
 116 #endif // _BIOS_H_
 117
 118 /* EOF */