reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.c

   1 /*
   2  * COPYRIGHT:       GPLv2+ - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            subsystems/mvdm/ntvdm/bios/bios32/vbe.c
   5  * PURPOSE:         VDM VESA BIOS Extensions (for the Cirrus CL-GD5434 emulated card)
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  */
   8
   9 /* INCLUDES *******************************************************************/
  10
  11 #define NDEBUG
  12
  13 #include "ntvdm.h"
  14 #include "emulator.h"
  15 #include "cpu/cpu.h"
  16
  17 #include "vbe.h"
  18
  19 #include "io.h"
  20
  21 /* PRIVATE VARIABLES **********************************************************/
  22
  23 static const VBE_MODE Modes[VBE_MODE_COUNT] = {
  24     { 0x00, 0x00,   NULL /* TODO */, NULL /* VGA */  },
  25     { 0x01, 0x01,   NULL /* TODO */, NULL /* VGA */  },
  26     { 0x02, 0x02,   NULL /* TODO */, NULL /* VGA */  },
  27     { 0x03, 0x03,   NULL /* TODO */, NULL /* VGA */  },
  28     { 0x04, 0x04,   NULL /* TODO */, NULL /* VGA */  },
  29     { 0x05, 0x05,   NULL /* TODO */, NULL /* VGA */  },
  30     { 0x06, 0x06,   NULL /* TODO */, NULL /* VGA */  },
  31     { 0x07, 0x07,   NULL /* TODO */, NULL /* VGA */  },
  32     { 0x0D, 0x0D,   NULL /* TODO */, NULL /* VGA */  },
  33     { 0x0E, 0x0E,   NULL /* TODO */, NULL /* VGA */  },
  34     { 0x0F, 0x0F,   NULL /* TODO */, NULL /* VGA */  },
  35     { 0x10, 0x10,   NULL /* TODO */, NULL /* VGA */  },
  36     { 0x11, 0x11,   NULL /* TODO */, NULL /* VGA */  },
  37     { 0x12, 0x12,   NULL /* TODO */, NULL /* VGA */  },
  38     { 0x13, 0x13,   NULL /* TODO */, NULL /* VGA */  },
  39     { 0x14, 0xFFFF, NULL /* TODO */, NULL /* TODO */ },
  40     { 0x54, 0x10A,  NULL /* TODO */, NULL /* TODO */ },
  41     { 0x55, 0x109,  NULL /* TODO */, NULL /* TODO */ },
  42     { 0x58, 0x102,  NULL /* TODO */, NULL /* TODO */ },
  43     { 0x5C, 0x103,  NULL /* TODO */, NULL /* TODO */ },
  44     { 0x5D, 0x104,  NULL /* TODO */, NULL /* TODO */ },
  45     { 0x5E, 0x100,  NULL /* TODO */, NULL /* TODO */ },
  46     { 0x5F, 0x101,  NULL /* TODO */, NULL /* TODO */ },
  47     { 0x60, 0x105,  NULL /* TODO */, NULL /* TODO */ },
  48     { 0x64, 0x111,  NULL /* TODO */, NULL /* TODO */ },
  49     { 0x65, 0x114,  NULL /* TODO */, NULL /* TODO */ },
  50     { 0x66, 0x110,  NULL /* TODO */, NULL /* TODO */ },
  51     { 0x67, 0x113,  NULL /* TODO */, NULL /* TODO */ },
  52     { 0x68, 0x116,  NULL /* TODO */, NULL /* TODO */ },
  53     { 0x69, 0x119,  NULL /* TODO */, NULL /* TODO */ },
  54     { 0x6C, 0x106,  NULL /* TODO */, NULL /* TODO */ },
  55     { 0x6D, 0x107,  NULL /* TODO */, NULL /* TODO */ },
  56     { 0x71, 0x112,  NULL /* TODO */, NULL /* TODO */ },
  57     { 0x72, 0xFFFF, NULL /* TODO */, NULL /* TODO */ },
  58     { 0x73, 0xFFFF, NULL /* TODO */, NULL /* TODO */ },
  59     { 0x74, 0x117,  NULL /* TODO */, NULL /* TODO */ },
  60     { 0x75, 0x11A,  NULL /* TODO */, NULL /* TODO */ },
  61     { 0x76, 0xFFFF, NULL /* TODO */, NULL /* TODO */ },
  62     { 0x78, 0x115,  NULL /* TODO */, NULL /* TODO */ },
  63     { 0x79, 0x118,  NULL /* TODO */, NULL /* TODO */ },
  64 };
  65
  66 /* PUBLIC FUNCTIONS ***********************************************************/
  67
  68 VOID WINAPI VbeService(LPWORD Stack)
  69 {
  70     INT i;
  71
  72     switch (getAL())
  73     {
  74         /* Get VBE Information */
  75         case 0x00:
  76         {
  77             VBE_INFORMATION Info;
  78             PWORD Data = (PWORD)&Info;
  79
  80             /* Function recognized */
  81             setAL(0x4F);
  82
  83             ZeroMemory(&Info, sizeof(VBE_INFORMATION));
  84             Info.Signature = 'ASEV';
  85             Info.Version = 0x0102;
  86             Info.OemName = OEM_NAME_PTR;
  87             Info.Capabilities = 0;
  88             Info.ModeList = MAKELONG(LOWORD(getDI()
  89                                      + FIELD_OFFSET(VBE_INFORMATION, ModeListBuffer)),
  90                                      getES());
  91             Info.VideoMemory = HIWORD(SVGA_BANK_SIZE * VGA_NUM_BANKS);
  92
  93             /* Fill the mode list */
  94             for (i = 0; i < VBE_MODE_COUNT; i++)
  95             {
  96                 /* Some modes don't have VESA numbers */
  97                 if (Modes[i].VesaNumber != 0xFFFF)
  98                 {
  99                     Info.ModeListBuffer[i] = Modes[i].VesaNumber;
 100                 }
 101             }
 102
 103             Info.ModeListBuffer[VBE_MODE_COUNT] = 0xFFFF;
 104
 105             /* Copy the data to the caller */
 106             for (i = 0; i < sizeof(VBE_INFORMATION) / sizeof(WORD); i++)
 107             {
 108                 *(PWORD)SEG_OFF_TO_PTR(getES(), LOWORD(getDI() + i * 2)) = Data[i];
 109             }
 110
 111             setAH(0);
 112             break;
 113         }
 114
 115         /* Get VBE Mode Information */
 116         case 0x01:
 117         {
 118             WORD ModeNumber = getCX() & 0x1FF;
 119             PWORD Data = NULL;
 120
 121             /* Function recognized */
 122             setAL(0x4F);
 123
 124             /* Find the mode */
 125             for (i = 0; i < VBE_MODE_COUNT; i++)
 126             {
 127                 if ((!(ModeNumber & 0x100) && (ModeNumber == Modes[i].Number))
 128                     || ((ModeNumber & 0x100) && (ModeNumber == Modes[i].VesaNumber)))
 129                 {
 130                     Data = (PWORD)Modes[i].Info;
 131
 132                     if (Data == NULL)
 133                     {
 134                         DPRINT1("WARNING: The mode information for mode %02X (%03X) is missing!\n",
 135                                 Modes[i].Number,
 136                                 Modes[i].VesaNumber);
 137                     }
 138                 }
 139             }
 140
 141             if (Data == NULL)
 142             {
 143                 /* Mode not found */
 144                 setAH(1);
 145                 break;
 146             }
 147
 148             /* Clear the buffer */
 149             for (i = 0; i < 128; i++)
 150             {
 151                 *(PWORD)SEG_OFF_TO_PTR(getES(), LOWORD(getDI() + i * 2)) = 0;
 152             }
 153
 154             /* Copy the data to the caller */
 155             for (i = 0; i < sizeof(VBE_MODE_INFO) / sizeof(WORD); i++)
 156             {
 157                 *(PWORD)SEG_OFF_TO_PTR(getES(), LOWORD(getDI() + i * 2)) = Data[i];
 158             }
 159
 160             setAH(0);
 161             break;
 162         }
 163
 164         default:
 165         {
 166             DPRINT1("VESA BIOS Extensions function %02Xh NOT IMPLEMENTED!\n", getAL());
 167             break;
 168         }
 169     }
 170 }
 171
 172 BOOLEAN VbeInitialize(VOID)
 173 {
 174     BOOLEAN Success;
 175     BYTE SeqIndex = IOReadB(VGA_SEQ_INDEX);
 176
 177     /* Store the OEM name */
 178     strcpy(FAR_POINTER(OEM_NAME_PTR), OEM_NAME);
 179
 180     /* Unlock SVGA extensions on the card */
 181     IOWriteB(VGA_SEQ_INDEX, SVGA_SEQ_UNLOCK_REG);
 182     IOWriteB(VGA_SEQ_DATA, SVGA_SEQ_UNLOCKED);
 183
 184     /* Check if it worked */
 185     Success = IOReadB(VGA_SEQ_DATA) == SVGA_SEQ_UNLOCKED;
 186
 187     IOWriteB(VGA_SEQ_INDEX, SeqIndex);
 188     return Success;
 189 }