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:            subsystems/mvdm/ntvdm/bios/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 /* DEFINES ********************************************************************/
  13
  14 /* BOP Identifiers */
  15 #define BOP_RESET       0x00    // Windows NTVDM (SoftPC) BIOS calls BOP 0x00
  16                                 // to let the virtual machine perform the POST.
  17 #define BOP_EQUIPLIST   0x11
  18 #define BOP_GETMEMSIZE  0x12
  19
  20
  21
  22
  23 #define BDA_SEGMENT     0x40
  24 #define BIOS_SEGMENT    0xF000
  25
  26 #pragma pack(push, 1)
  27
  28 /*
  29  * BIOS Data Area at 0040:XXXX
  30  *
  31  * See: http://webpages.charter.net/danrollins/techhelp/0093.HTM
  32  * and: http://www.bioscentral.com/misc/bda.htm
  33  * for more information.
  34  */
  35 typedef struct
  36 {
  37     WORD SerialPorts[4];                        // 0x00
  38     WORD ParallelPorts[3];                      // 0x08
  39     WORD EbdaSegment;                           // 0x0e - ParallelPort in PC/XT
  40     WORD EquipmentList;                         // 0x10
  41     BYTE Reserved0;                             // 0x12 - Errors in PCjr infrared keyboard link
  42     WORD MemorySize;                            // 0x13
  43     WORD Reserved1;                             // 0x15 - Scratch pad for manufacturing error tests
  44     WORD KeybdShiftFlags;                       // 0x17
  45     BYTE AlternateKeypad;                       // 0x19
  46     WORD KeybdBufferHead;                       // 0x1a
  47     WORD KeybdBufferTail;                       // 0x1c
  48     WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];     // 0x1e
  49     BYTE DriveRecalibrate;                      // 0x3e
  50     BYTE DriveMotorStatus;                      // 0x3f
  51     BYTE MotorShutdownCounter;                  // 0x40
  52     BYTE LastDisketteOperation;                 // 0x41
  53     BYTE Reserved2[7];                          // 0x42
  54     BYTE VideoMode;                             // 0x49
  55     WORD ScreenColumns;                         // 0x4a
  56     WORD VideoPageSize;                         // 0x4c
  57     WORD VideoPageOffset;                       // 0x4e
  58     WORD CursorPosition[BIOS_MAX_PAGES];        // 0x50
  59     BYTE CursorEndLine;                         // 0x60
  60     BYTE CursorStartLine;                       // 0x61
  61     BYTE VideoPage;                             // 0x62
  62     WORD CrtBasePort;                           // 0x63
  63     BYTE CrtModeControl;                        // 0x65
  64     BYTE CrtColorPaletteMask;                   // 0x66
  65
  66     union                                       // 0x67
  67     {
  68         BYTE  CassetteData[5];  // Cassette tape control (unused)
  69         DWORD ResumeEntryPoint; // CS:IP for 286 return from Protected Mode
  70     };
  71
  72     DWORD TickCounter;                          // 0x6c
  73     BYTE MidnightPassed;                        // 0x70
  74     BYTE CtrlBreakFlag;                         // 0x71
  75     WORD SoftReset;                             // 0x72
  76     BYTE LastDiskOperation;                     // 0x74
  77     BYTE NumDisks;                              // 0x75
  78     BYTE DriveControlByte;                      // 0x76
  79     BYTE DiskPortOffset;                        // 0x77
  80     BYTE LptTimeOut[4];                         // 0x78
  81     BYTE ComTimeOut[4];                         // 0x7c
  82     WORD KeybdBufferStart;                      // 0x80
  83     WORD KeybdBufferEnd;                        // 0x82
  84     BYTE ScreenRows;                            // 0x84
  85     WORD CharacterHeight;                       // 0x85
  86     BYTE VGAOptions;                            // 0x87
  87     BYTE VGASwitches;                           // 0x88
  88     BYTE VGAFlags;                              // 0x89
  89     BYTE VGADccIDActive;                        // 0x8a
  90     DWORD Reserved3;                            // 0x8b
  91     BYTE Reserved4;                             // 0x8f
  92     BYTE FloppyDriveState[2];                   // 0x90
  93     BYTE Reserved6[2];                          // 0x92
  94     BYTE Reserved7[2];                          // 0x94
  95     BYTE KeybdStatusFlags;                      // 0x96
  96     BYTE KeybdLedFlags;                         // 0x97
  97     DWORD Reserved9;                            // 0x98
  98     DWORD Reserved10;                           // 0x9c
  99     DWORD Reserved11[2];                        // 0xa0
 100     DWORD EGAPtr;                               // 0xa8
 101     BYTE Reserved12[68];                        // 0xac
 102     BYTE Reserved13[16];                        // 0xf0
 103 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
 104 C_ASSERT(sizeof(BIOS_DATA_AREA) == 0x100);
 105
 106 /*
 107  * User Data Area at 0050:XXXX
 108  *
 109  * See: http://helppc.netcore2k.net/table/memory-map
 110  * for more information.
 111  */
 112 typedef struct
 113 {
 114     BYTE PrintScreen;                           // 0x00
 115     BYTE Basic0[3];                             // 0x01
 116     BYTE SingleDisketteFlag;                    // 0x04
 117     BYTE PostArea[10];                          // 0x05
 118     BYTE Basic1;                                // 0x0f
 119     WORD Basic2;                                // 0x10
 120     DWORD Basic3;                               // 0x12
 121     DWORD Basic4;                               // 0x16
 122     DWORD Basic5;                               // 0x1a
 123     WORD Reserved0;                             // 0x1e
 124     WORD DynStorage;                            // 0x20
 125     BYTE DisketteInitStorage[14];               // 0x22
 126     DWORD Reserved1;                            // 0x30
 127 } USER_DATA_AREA, *PUSER_DATA_AREA;
 128 C_ASSERT(sizeof(USER_DATA_AREA) == 0x34);
 129
 130 /*
 131  * BIOS Configuration Table at F000:E6F5 for 100% compatible BIOSes.
 132  *
 133  * See: http://www.ctyme.com/intr/rb-1594.htm
 134  * for more information.
 135  */
 136 typedef struct _BIOS_CONFIG_TABLE
 137 {
 138     WORD    Length;                             // 0x00 - Number of bytes following
 139     BYTE    Model;                              // 0x02
 140     BYTE    SubModel;                           // 0x03
 141     BYTE    Revision;                           // 0x04
 142     BYTE    Feature[5];                         // 0x05 -- 0x09
 143     // Other BIOSes may extend this table. We don't.
 144 } BIOS_CONFIG_TABLE, *PBIOS_CONFIG_TABLE;
 145
 146 #pragma pack(pop)
 147
 148 /* FUNCTIONS ******************************************************************/
 149
 150 extern PBIOS_DATA_AREA Bda;
 151 extern PBIOS_CONFIG_TABLE Bct;
 152
 153 VOID WINAPI BiosEquipmentService(LPWORD Stack);
 154 VOID WINAPI BiosGetMemorySize(LPWORD Stack);
 155
 156 BOOLEAN
 157 BiosInitialize(IN LPCSTR BiosFileName,
 158                IN LPCSTR RomFiles OPTIONAL);
 159
 160 VOID
 161 BiosCleanup(VOID);
 162
 163 #endif /* _BIOS_H_ */