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 /* 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 perform the POST.
  22 #define BOP_EQUIPLIST   0x11
  23 #define BOP_GETMEMSIZE  0x12
  24
  25
  26
  27
  28 #define BDA_SEGMENT     0x40
  29 #define BIOS_SEGMENT    0xF000
  30
  31 #pragma pack(push, 1)
  32
  33 /*
  34  * BIOS Data Area at 0040:XXXX
  35  *
  36  * See: http://webpages.charter.net/danrollins/techhelp/0093.HTM
  37  * and: http://www.bioscentral.com/misc/bda.htm
  38  * for more information.
  39  */
  40 typedef struct
  41 {
  42     WORD SerialPorts[4];                        // 0x00
  43     WORD ParallelPorts[3];                      // 0x08
  44     WORD EbdaSegment;                           // 0x0e - ParallelPort in PC/XT
  45     WORD EquipmentList;                         // 0x10
  46     BYTE Reserved0;                             // 0x12 - Errors in PCjr infrared keyboard link
  47     WORD MemorySize;                            // 0x13
  48     WORD Reserved1;                             // 0x15 - Scratch pad for manufacturing error tests
  49     WORD KeybdShiftFlags;                       // 0x17
  50     BYTE AlternateKeypad;                       // 0x19
  51     WORD KeybdBufferHead;                       // 0x1a
  52     WORD KeybdBufferTail;                       // 0x1c
  53     WORD KeybdBuffer[BIOS_KBD_BUFFER_SIZE];     // 0x1e
  54     BYTE DriveRecalibrate;                      // 0x3e
  55     BYTE DriveMotorStatus;                      // 0x3f
  56     BYTE MotorShutdownCounter;                  // 0x40
  57     BYTE LastDisketteOperation;                 // 0x41
  58     BYTE Reserved2[7];                          // 0x42
  59     BYTE VideoMode;                             // 0x49
  60     WORD ScreenColumns;                         // 0x4a
  61     WORD VideoPageSize;                         // 0x4c
  62     WORD VideoPageOffset;                       // 0x4e
  63     WORD CursorPosition[BIOS_MAX_PAGES];        // 0x50
  64     BYTE CursorEndLine;                         // 0x60
  65     BYTE CursorStartLine;                       // 0x61
  66     BYTE VideoPage;                             // 0x62
  67     WORD CrtBasePort;                           // 0x63
  68     BYTE CrtModeControl;                        // 0x65
  69     BYTE CrtColorPaletteMask;                   // 0x66
  70
  71     union                                       // 0x67
  72     {
  73         BYTE  CassetteData[5];  // Cassette tape control (unused)
  74         DWORD ResumeEntryPoint; // CS:IP for 286 return from Protected Mode
  75     };
  76
  77     DWORD TickCounter;                          // 0x6c
  78     BYTE MidnightPassed;                        // 0x70
  79     BYTE CtrlBreakFlag;                         // 0x71
  80     WORD SoftReset;                             // 0x72
  81     BYTE LastDiskOperation;                     // 0x74
  82     BYTE NumDisks;                              // 0x75
  83     BYTE DriveControlByte;                      // 0x76
  84     BYTE DiskPortOffset;                        // 0x77
  85     BYTE LptTimeOut[4];                         // 0x78
  86     BYTE ComTimeOut[4];                         // 0x7c
  87     WORD KeybdBufferStart;                      // 0x80
  88     WORD KeybdBufferEnd;                        // 0x82
  89     BYTE ScreenRows;                            // 0x84
  90     WORD CharacterHeight;                       // 0x85
  91     BYTE VGAOptions;                            // 0x87
  92     BYTE VGASwitches;                           // 0x88
  93     BYTE VGAFlags;                              // 0x89
  94     BYTE VGADccIDActive;                        // 0x8a
  95     DWORD Reserved3;                            // 0x8b
  96     BYTE Reserved4;                             // 0x8f
  97     BYTE FloppyDriveState[2];                   // 0x90
  98     BYTE Reserved6[2];                          // 0x92
  99     BYTE Reserved7[2];                          // 0x94
 100     BYTE KeybdStatusFlags;                      // 0x96
 101     BYTE KeybdLedFlags;                         // 0x97
 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 } BIOS_DATA_AREA, *PBIOS_DATA_AREA;
 109 C_ASSERT(sizeof(BIOS_DATA_AREA) == 0x100);
 110
 111 /*
 112  * User Data Area at 0050:XXXX
 113  *
 114  * See: http://helppc.netcore2k.net/table/memory-map
 115  * for more information.
 116  */
 117 typedef struct
 118 {
 119     BYTE PrintScreen;                           // 0x00
 120     BYTE Basic0[3];                             // 0x01
 121     BYTE SingleDisketteFlag;                    // 0x04
 122     BYTE PostArea[10];                          // 0x05
 123     BYTE Basic1;                                // 0x0f
 124     WORD Basic2;                                // 0x10
 125     DWORD Basic3;                               // 0x12
 126     DWORD Basic4;                               // 0x16
 127     DWORD Basic5;                               // 0x1a
 128     WORD Reserved0;                             // 0x1e
 129     WORD DynStorage;                            // 0x20
 130     BYTE DisketteInitStorage[14];               // 0x22
 131     DWORD Reserved1;                            // 0x30
 132 } USER_DATA_AREA, *PUSER_DATA_AREA;
 133 C_ASSERT(sizeof(USER_DATA_AREA) == 0x34);
 134
 135 /*
 136  * BIOS Configuration Table at F000:E6F5 for 100% compatible BIOSes.
 137  *
 138  * See: http://www.ctyme.com/intr/rb-1594.htm
 139  * for more information.
 140  */
 141 typedef struct _BIOS_CONFIG_TABLE
 142 {
 143     WORD    Length;                             // 0x00 - Number of bytes following
 144     BYTE    Model;                              // 0x02
 145     BYTE    SubModel;                           // 0x03
 146     BYTE    Revision;                           // 0x04
 147     BYTE    Feature[5];                         // 0x05 -- 0x09
 148     // Other BIOSes may extend this table. We don't.
 149 } BIOS_CONFIG_TABLE, *PBIOS_CONFIG_TABLE;
 150
 151 #pragma pack(pop)
 152
 153 /* FUNCTIONS ******************************************************************/
 154
 155 extern PBIOS_DATA_AREA Bda;
 156 extern PBIOS_CONFIG_TABLE Bct;
 157
 158 VOID WINAPI BiosEquipmentService(LPWORD Stack);
 159 VOID WINAPI BiosGetMemorySize(LPWORD Stack);
 160
 161 BOOLEAN
 162 BiosInitialize(IN LPCSTR BiosFileName,
 163                IN LPCSTR RomFiles OPTIONAL);
 164
 165 VOID
 166 BiosCleanup(VOID);
 167
 168 #endif // _BIOS_H_
 169
 170 /* EOF */