reactos/subsystems/mvdm/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 /* BOP Identifiers */
  21 #define BOP_RESET       0x00    // Windows NTVDM (SoftPC) BIOS calls BOP 0x00
  22                                 // to let the virtual machine initialize itself
  23                                 // the IVT and its hardware.
  24 #define BOP_EQUIPLIST   0x11
  25 #define BOP_GETMEMSIZE  0x12
  26
  27
  28
  29
  30 #define BDA_SEGMENT     0x40
  31 #define BIOS_SEGMENT    0xF000
  32
  33 // HACK: Disable FPU for now because it is not fully ready yet for being used
  34 // by all applications (e.g. QBasic runtime would use the native FPU if the bit
  35 // is set, but then subsequently fails, unless the FPU bit is unset in that case
  36 // QBasic uses its emulated FPU).
  37 #define BIOS_EQUIPMENT_LIST 0x2C    // Bit1: FPU, Bit 2: Mouse
  38
  39 #pragma pack(push, 1)
  40
  41 /*
  42  * BIOS Data Area at 0040:XXXX
  43  *
  44  * See: http://webpages.charter.net/danrollins/techhelp/0093.HTM
  45  * and: http://www.bioscentral.com/misc/bda.htm
  46  * for more information.
  47  */
  48 typedef struct
  49 {
  50     WORD SerialPorts[4];                        // 0x00
  51     WORD ParallelPorts[3];                      // 0x08
  52     WORD EbdaSegment;                           // 0x0e - ParallelPort in PC/XT
  53     WORD EquipmentList;                         // 0x10
  54     BYTE Reserved0;                             // 0x12 - Errors in PCjr infrared keyboard link
  55     WORD MemorySize;                            // 0x13
  56     WORD Reserved1;                             // 0x15 - Scratch pad for manufacturing error tests
  57     WORD KeybdShiftFlags;                       // 0x17
  58     BYTE AlternateKeypad;                       // 0x19
  59     WORD KeybdBufferHead;                       // 0x1a
  60     WORD KeybdBufferTail;                       // 0x1c
  61     WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];     // 0x1e
  62     BYTE DriveRecalibrate;                      // 0x3e
  63     BYTE DriveMotorStatus;                      // 0x3f
  64     BYTE MotorShutdownCounter;                  // 0x40
  65     BYTE LastDisketteOperation;                 // 0x41
  66     BYTE Reserved2[7];                          // 0x42
  67     BYTE VideoMode;                             // 0x49
  68     WORD ScreenColumns;                         // 0x4a
  69     WORD VideoPageSize;                         // 0x4c
  70     WORD VideoPageOffset;                       // 0x4e
  71     WORD CursorPosition[BIOS_MAX_PAGES];        // 0x50
  72     BYTE CursorEndLine;                         // 0x60
  73     BYTE CursorStartLine;                       // 0x61
  74     BYTE VideoPage;                             // 0x62
  75     WORD CrtBasePort;                           // 0x63
  76     BYTE CrtModeControl;                        // 0x65
  77     BYTE CrtColorPaletteMask;                   // 0x66
  78     BYTE CassetteData[5];                       // 0x67
  79     DWORD TickCounter;                          // 0x6c
  80     BYTE MidnightPassed;                        // 0x70
  81     BYTE BreakFlag;                             // 0x71
  82     WORD SoftReset;                             // 0x72
  83     BYTE LastDiskOperation;                     // 0x74
  84     BYTE NumDisks;                              // 0x75
  85     BYTE DriveControlByte;                      // 0x76
  86     BYTE DiskPortOffset;                        // 0x77
  87     BYTE LptTimeOut[4];                         // 0x78
  88     BYTE ComTimeOut[4];                         // 0x7c
  89     WORD KeybdBufferStart;                      // 0x80
  90     WORD KeybdBufferEnd;                        // 0x82
  91     BYTE ScreenRows;                            // 0x84
  92     WORD CharacterHeight;                       // 0x85
  93     BYTE VGAOptions;                            // 0x87
  94     BYTE VGASwitches;                           // 0x88
  95     BYTE VGAFlags[2];                           // 0x89
  96     DWORD Reserved3;                            // 0x8b
  97     BYTE Reserved4;                             // 0x8f
  98     BYTE Reserved5[2];                          // 0x90
  99     BYTE Reserved6[2];                          // 0x92
 100     BYTE Reserved7[2];                          // 0x94
 101     WORD KeybdStatusFlags;                      // 0x96
 102     DWORD Reserved9;                            // 0x98
 103     DWORD Reserved10;                           // 0x9c
 104     DWORD Reserved11[2];                        // 0xa0
 105     DWORD EGAPtr;                               // 0xa8
 106     BYTE Reserved12[68];                        // 0xac
 107     BYTE Reserved13[16];                        // 0xf0
 108
 109     DWORD Reserved14;                           // 0x100
 110     BYTE Reserved15[12];                        // 0x104
 111     BYTE Reserved16[17];                        // 0x110
 112     BYTE Reserved17[15];                        // 0x121
 113     BYTE Reserved18[3];                         // 0x130
 114 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
 115 C_ASSERT(sizeof(BIOS_DATA_AREA) == 0x133);
 116
 117 /*
 118  * BIOS Configuration Table at F000:E6F5 for 100% compatible BIOSes.
 119  *
 120  * See: http://www.ctyme.com/intr/rb-1594.htm
 121  * for more information.
 122  */
 123 typedef struct _BIOS_CONFIG_TABLE
 124 {
 125     WORD    Length;                             // 0x00
 126     BYTE    Model;                              // 0x02
 127     BYTE    SubModel;                           // 0x03
 128     BYTE    Revision;                           // 0x04
 129     BYTE    Feature[5];                         // 0x05 -- 0x09
 130     // Other BIOSes may extend this table. We don't.
 131 } BIOS_CONFIG_TABLE, *PBIOS_CONFIG_TABLE;
 132
 133 #pragma pack(pop)
 134
 135 /* FUNCTIONS ******************************************************************/
 136
 137 extern PBIOS_DATA_AREA Bda;
 138 extern PBIOS_CONFIG_TABLE Bct;
 139
 140 VOID WINAPI BiosEquipmentService(LPWORD Stack);
 141 VOID WINAPI BiosGetMemorySize(LPWORD Stack);
 142
 143 BOOLEAN
 144 BiosInitialize(IN LPCSTR BiosFileName);
 145
 146 VOID
 147 BiosCleanup(VOID);
 148
 149 #endif // _BIOS_H_
 150
 151 /* EOF */