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 "kbdbios.h"
  15 #include "vidbios.h"
  16
  17 /* DEFINES ********************************************************************/
  18
  19 /* BOP Identifiers */
  20 #define BOP_RESET       0x00    // Windows NTVDM (SoftPC) BIOS calls BOP 0x00
  21                                 // to let the virtual machine initialize itself
  22                                 // the IVT and its hardware.
  23 #define BOP_EQUIPLIST   0x11
  24 #define BOP_GETMEMSIZE  0x12
  25
  26
  27
  28
  29 #define BDA_SEGMENT     0x40
  30 #define BIOS_SEGMENT    0xF000
  31
  32 // HACK: Disable FPU for now because it is not fully ready yet for being used
  33 // by all applications (e.g. QBasic runtime would use the native FPU if the bit
  34 // is set, but then subsequently fails, unless the FPU bit is unset in that case
  35 // QBasic uses its emulated FPU).
  36 #define BIOS_EQUIPMENT_LIST 0x2E    // Bit1: FPU, Bit 2: Mouse
  37
  38 #pragma pack(push, 1)
  39
  40 /*
  41  * BIOS Data Area at 0040:XXXX
  42  *
  43  * See: http://webpages.charter.net/danrollins/techhelp/0093.HTM
  44  * and: http://www.bioscentral.com/misc/bda.htm
  45  * for more information.
  46  */
  47 typedef struct
  48 {
  49     WORD SerialPorts[4];                        // 0x00
  50     WORD ParallelPorts[3];                      // 0x08
  51     WORD EbdaSegment;                           // 0x0e - ParallelPort in PC/XT
  52     WORD EquipmentList;                         // 0x10
  53     BYTE Reserved0;                             // 0x12 - Errors in PCjr infrared keyboard link
  54     WORD MemorySize;                            // 0x13
  55     WORD Reserved1;                             // 0x15 - Scratch pad for manufacturing error tests
  56     WORD KeybdShiftFlags;                       // 0x17
  57     BYTE AlternateKeypad;                       // 0x19
  58     WORD KeybdBufferHead;                       // 0x1a
  59     WORD KeybdBufferTail;                       // 0x1c
  60     WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];     // 0x1e
  61     BYTE DriveRecalibrate;                      // 0x3e
  62     BYTE DriveMotorStatus;                      // 0x3f
  63     BYTE MotorShutdownCounter;                  // 0x40
  64     BYTE LastDisketteOperation;                 // 0x41
  65     BYTE Reserved2[7];                          // 0x42
  66     BYTE VideoMode;                             // 0x49
  67     WORD ScreenColumns;                         // 0x4a
  68     WORD VideoPageSize;                         // 0x4c
  69     WORD VideoPageOffset;                       // 0x4e
  70     WORD CursorPosition[BIOS_MAX_PAGES];        // 0x50
  71     BYTE CursorEndLine;                         // 0x60
  72     BYTE CursorStartLine;                       // 0x61
  73     BYTE VideoPage;                             // 0x62
  74     WORD CrtBasePort;                           // 0x63
  75     BYTE CrtModeControl;                        // 0x65
  76     BYTE CrtColorPaletteMask;                   // 0x66
  77
  78     union                                       // 0x67
  79     {
  80         BYTE  CassetteData[5];  // Cassette tape control (unused)
  81         DWORD ResumeEntryPoint; // CS:IP for 286 return from Protected Mode
  82     };
  83
  84     DWORD TickCounter;                          // 0x6c
  85     BYTE MidnightPassed;                        // 0x70
  86     BYTE BreakFlag;                             // 0x71
  87     WORD SoftReset;                             // 0x72
  88     BYTE LastDiskOperation;                     // 0x74
  89     BYTE NumDisks;                              // 0x75
  90     BYTE DriveControlByte;                      // 0x76
  91     BYTE DiskPortOffset;                        // 0x77
  92     BYTE LptTimeOut[4];                         // 0x78
  93     BYTE ComTimeOut[4];                         // 0x7c
  94     WORD KeybdBufferStart;                      // 0x80
  95     WORD KeybdBufferEnd;                        // 0x82
  96     BYTE ScreenRows;                            // 0x84
  97     WORD CharacterHeight;                       // 0x85
  98     BYTE VGAOptions;                            // 0x87
  99     BYTE VGASwitches;                           // 0x88
 100     BYTE VGAFlags;                              // 0x89
 101     BYTE VGADccIDActive;                        // 0x8a
 102     DWORD Reserved3;                            // 0x8b
 103     BYTE Reserved4;                             // 0x8f
 104     BYTE Reserved5[2];                          // 0x90
 105     BYTE Reserved6[2];                          // 0x92
 106     BYTE Reserved7[2];                          // 0x94
 107     WORD KeybdStatusFlags;                      // 0x96
 108     DWORD Reserved9;                            // 0x98
 109     DWORD Reserved10;                           // 0x9c
 110     DWORD Reserved11[2];                        // 0xa0
 111     DWORD EGAPtr;                               // 0xa8
 112     BYTE Reserved12[68];                        // 0xac
 113     BYTE Reserved13[16];                        // 0xf0
 114
 115     DWORD Reserved14;                           // 0x100
 116     BYTE Reserved15[12];                        // 0x104
 117     BYTE Reserved16[17];                        // 0x110
 118     BYTE Reserved17[15];                        // 0x121
 119     BYTE Reserved18[3];                         // 0x130
 120 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
 121 C_ASSERT(sizeof(BIOS_DATA_AREA) == 0x133);
 122
 123 /*
 124  * BIOS Configuration Table at F000:E6F5 for 100% compatible BIOSes.
 125  *
 126  * See: http://www.ctyme.com/intr/rb-1594.htm
 127  * for more information.
 128  */
 129 typedef struct _BIOS_CONFIG_TABLE
 130 {
 131     WORD    Length;                             // 0x00
 132     BYTE    Model;                              // 0x02
 133     BYTE    SubModel;                           // 0x03
 134     BYTE    Revision;                           // 0x04
 135     BYTE    Feature[5];                         // 0x05 -- 0x09
 136     // Other BIOSes may extend this table. We don't.
 137 } BIOS_CONFIG_TABLE, *PBIOS_CONFIG_TABLE;
 138
 139 #pragma pack(pop)
 140
 141 /* FUNCTIONS ******************************************************************/
 142
 143 extern PBIOS_DATA_AREA Bda;
 144 extern PBIOS_CONFIG_TABLE Bct;
 145
 146 VOID WINAPI BiosEquipmentService(LPWORD Stack);
 147 VOID WINAPI BiosGetMemorySize(LPWORD Stack);
 148
 149 BOOLEAN
 150 BiosInitialize(IN LPCSTR BiosFileName);
 151
 152 VOID
 153 BiosCleanup(VOID);
 154
 155 #endif // _BIOS_H_
 156
 157 /* EOF */