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 #pragma pack(push, 1)
  26
  27 /*
  28  * BIOS Data Area at 0040:XXXX
  29  *
  30  * See: http://webpages.charter.net/danrollins/techhelp/0093.HTM
  31  * and: http://www.bioscentral.com/misc/bda.htm
  32  * for more information.
  33  */
  34 typedef struct
  35 {
  36     WORD SerialPorts[4];                        // 0x00
  37     WORD ParallelPorts[3];                      // 0x08
  38     WORD EbdaSegment;                           // 0x0e - ParallelPort in PC/XT
  39     WORD EquipmentList;                         // 0x10
  40     BYTE Reserved0;                             // 0x12 - Errors in PCjr infrared keyboard link
  41     WORD MemorySize;                            // 0x13
  42     WORD Reserved1;                             // 0x15 - Scratch pad for manufacturing error tests
  43     WORD KeybdShiftFlags;                       // 0x17
  44     BYTE AlternateKeypad;                       // 0x19
  45     WORD KeybdBufferHead;                       // 0x1a
  46     WORD KeybdBufferTail;                       // 0x1c
  47     WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];     // 0x1e
  48     BYTE DriveRecalibrate;                      // 0x3e
  49     BYTE DriveMotorStatus;                      // 0x3f
  50     BYTE MotorShutdownCounter;                  // 0x40
  51     BYTE LastDisketteOperation;                 // 0x41
  52     BYTE Reserved2[7];                          // 0x42
  53     BYTE VideoMode;                             // 0x49
  54     WORD ScreenColumns;                         // 0x4a
  55     WORD VideoPageSize;                         // 0x4c
  56     WORD VideoPageOffset;                       // 0x4e
  57     WORD CursorPosition[BIOS_MAX_PAGES];        // 0x50
  58     BYTE CursorEndLine;                         // 0x60
  59     BYTE CursorStartLine;                       // 0x61
  60     BYTE VideoPage;                             // 0x62
  61     WORD CrtBasePort;                           // 0x63
  62     BYTE CrtModeControl;                        // 0x65
  63     BYTE CrtColorPaletteMask;                   // 0x66
  64     BYTE CassetteData[5];                       // 0x67
  65     DWORD TickCounter;                          // 0x6c
  66     BYTE MidnightPassed;                        // 0x70
  67     BYTE BreakFlag;                             // 0x71
  68     WORD SoftReset;                             // 0x72
  69     BYTE LastDiskOperation;                     // 0x74
  70     BYTE NumDisks;                              // 0x75
  71     BYTE DriveControlByte;                      // 0x76
  72     BYTE DiskPortOffset;                        // 0x77
  73     BYTE LptTimeOut[4];                         // 0x78
  74     BYTE ComTimeOut[4];                         // 0x7c
  75     WORD KeybdBufferStart;                      // 0x80
  76     WORD KeybdBufferEnd;                        // 0x82
  77     BYTE ScreenRows;                            // 0x84
  78     WORD CharacterHeight;                       // 0x85
  79     BYTE EGAFlags[2];                           // 0x87
  80     BYTE VGAFlags[2];                           // 0x89
  81     DWORD Reserved3;                            // 0x8b
  82     BYTE Reserved4;                             // 0x8f
  83     BYTE Reserved5[2];                          // 0x90
  84     BYTE Reserved6[2];                          // 0x92
  85     BYTE Reserved7[2];                          // 0x94
  86     WORD Reserved8;                             // 0x96
  87     DWORD Reserved9;                            // 0x98
  88     DWORD Reserved10;                           // 0x9c
  89     DWORD Reserved11[2];                        // 0xa0
  90     DWORD EGAPtr;                               // 0xa8
  91     BYTE Reserved12[68];                        // 0xac
  92     BYTE Reserved13[16];                        // 0xf0
  93
  94     DWORD Reserved14;                           // 0x100
  95     BYTE Reserved15[12];                        // 0x104
  96     BYTE Reserved16[17];                        // 0x110
  97     BYTE Reserved17[15];                        // 0x121
  98     BYTE Reserved18[3];                         // 0x130
  99 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
 100 C_ASSERT(sizeof(BIOS_DATA_AREA) == 0x133);
 101
 102 /*
 103  * BIOS Configuration Table at F000:E6F5 for 100% compatible BIOSes.
 104  *
 105  * See: http://www.ctyme.com/intr/rb-1594.htm
 106  * for more information.
 107  */
 108 typedef struct _BIOS_CONFIG_TABLE
 109 {
 110     WORD    Length;                             // 0x00
 111     BYTE    Model;                              // 0x02
 112     BYTE    SubModel;                           // 0x03
 113     BYTE    BiosRevision;                       // 0x04
 114     BYTE    BiosFeature[5];                     // 0x05 -- 0x09
 115     // Other BIOSes may extend this table. We don't.
 116 } BIOS_CONFIG_TABLE, *PBIOS_CONFIG_TABLE;
 117
 118 #pragma pack(pop)
 119
 120 /* FUNCTIONS ******************************************************************/
 121
 122 extern PBIOS_DATA_AREA Bda;
 123 extern PBIOS_CONFIG_TABLE Bct;
 124
 125 VOID WINAPI BiosEquipmentService(LPWORD Stack);
 126 VOID WINAPI BiosGetMemorySize(LPWORD Stack);
 127
 128 BOOLEAN
 129 BiosInitialize(IN LPCSTR BiosFileName);
 130
 131 VOID
 132 BiosCleanup(VOID);
 133
 134 #endif // _BIOS_H_
 135
 136 /* EOF */