msdos/int11.c

   1 /*
   2  * BIOS interrupt 11h handler
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "windef.h"
  28 #include "miscemu.h"
  29 #include "msdos.h"
  30 #include "file.h"
  31 #include "wine/debug.h"
  32
  33 /**********************************************************************
  34  *          INT_Int11Handler (WPROCS.117)
  35  *
  36  * Handler for int 11h (get equipment list).
  37  */
  38 void WINAPI INT_Int11Handler( CONTEXT86 *context )
  39 {
  40     int diskdrives = 0;
  41     int parallelports = 0;
  42     int serialports = 0;
  43     int x;
  44
  45 /* borrowed from Ralph Brown's interrupt lists
  46
  47                     bits 15-14: number of parallel devices
  48                     bit     13: [Conv] Internal modem
  49                     bit     12: reserved
  50                     bits 11- 9: number of serial devices
  51                     bit      8: reserved
  52                     bits  7- 6: number of diskette drives minus one
  53                     bits  5- 4: Initial video mode:
  54                                     00b = EGA,VGA,PGA
  55                                     01b = 40 x 25 color
  56                                     10b = 80 x 25 color
  57                                     11b = 80 x 25 mono
  58                     bit      3: reserved
  59                     bit      2: [PS] =1 if pointing device
  60                                 [non-PS] reserved
  61                     bit      1: =1 if math co-processor
  62                     bit      0: =1 if diskette available for boot
  63 */
  64 /*  Currently the only of these bits correctly set are:
  65                 bits 15-14              } Added by William Owen Smith,
  66                 bits 11-9               } wos@dcs.warwick.ac.uk
  67                 bits 7-6
  68                 bit  2                  (always set)
  69 */
  70
  71     if (GetDriveTypeA("A:\\") == DRIVE_REMOVABLE) diskdrives++;
  72     if (GetDriveTypeA("B:\\") == DRIVE_REMOVABLE) diskdrives++;
  73     if (diskdrives) diskdrives--;
  74
  75     for (x=0; x < 9; x++)
  76     {
  77         char temp[16],name[16];
  78
  79         sprintf(name,"COM%d",x+1);
  80         PROFILE_GetWineIniString("serialports",name,"*",temp,sizeof temp);
  81         if(strcmp(temp,"*"))
  82             serialports++;
  83
  84         sprintf(name,"LPT%d",x+1);
  85         PROFILE_GetWineIniString("parallelports",name,"*",temp,sizeof temp);
  86         if(strcmp(temp,"*"))
  87             parallelports++;
  88     }
  89     if (serialports > 7)                /* 3 bits -- maximum value = 7 */
  90         serialports=7;
  91     if (parallelports > 3)              /* 2 bits -- maximum value = 3 */
  92         parallelports=3;
  93
  94     AX_reg(context) = (diskdrives << 6) | (serialports << 9) |
  95                       (parallelports << 14) | 0x02;
  96 }