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 #include "wine/port.h"
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include "windef.h"
  29 #include "miscemu.h"
  30 #include "msdos.h"
  31 #include "file.h"
  32 #include "wine/unicode.h"
  33 #include "wine/debug.h"
  34
  35 /**********************************************************************
  36  *          INT_Int11Handler (WPROCS.117)
  37  *
  38  * Handler for int 11h (get equipment list).
  39  */
  40 void WINAPI INT_Int11Handler( CONTEXT86 *context )
  41 {
  42     int diskdrives = 0;
  43     int parallelports = 0;
  44     int serialports = 0;
  45     int x;
  46
  47 /* borrowed from Ralph Brown's interrupt lists
  48
  49                     bits 15-14: number of parallel devices
  50                     bit     13: [Conv] Internal modem
  51                     bit     12: reserved
  52                     bits 11- 9: number of serial devices
  53                     bit      8: reserved
  54                     bits  7- 6: number of diskette drives minus one
  55                     bits  5- 4: Initial video mode:
  56                                     00b = EGA,VGA,PGA
  57                                     01b = 40 x 25 color
  58                                     10b = 80 x 25 color
  59                                     11b = 80 x 25 mono
  60                     bit      3: reserved
  61                     bit      2: [PS] =1 if pointing device
  62                                 [non-PS] reserved
  63                     bit      1: =1 if math co-processor
  64                     bit      0: =1 if diskette available for boot
  65 */
  66 /*  Currently the only of these bits correctly set are:
  67                 bits 15-14              } Added by William Owen Smith,
  68                 bits 11-9               } wos@dcs.warwick.ac.uk
  69                 bits 7-6
  70                 bit  2                  (always set)
  71 */
  72
  73     if (GetDriveTypeA("A:\\") == DRIVE_REMOVABLE) diskdrives++;
  74     if (GetDriveTypeA("B:\\") == DRIVE_REMOVABLE) diskdrives++;
  75     if (diskdrives) diskdrives--;
  76
  77     for (x=0; x < 9; x++)
  78     {
  79         WCHAR temp[16];
  80         WCHAR comW[] = {'C','O','M','?',0};
  81         WCHAR lptW[] = {'L','P','T','?',0};
  82         static const WCHAR serialportsW[] = {'s','e','r','i','a','l','p','o','r','t','s',0};
  83         static const WCHAR parallelportsW[] = {'p','a','r','a','l','l','e','l','p','o','r','t','s',0};
  84         static const WCHAR asteriskW[] = {'*',0};
  85
  86         comW[3] = '0' + x;
  87         PROFILE_GetWineIniString(serialportsW, comW, asteriskW, temp, 16);
  88         if(strcmpW(temp, asteriskW))
  89             serialports++;
  90
  91         lptW[3] = '0' + x;
  92         PROFILE_GetWineIniString(parallelportsW, lptW, asteriskW, temp, 16);
  93         if(strcmpW(temp, asteriskW))
  94             parallelports++;
  95     }
  96     if (serialports > 7)                /* 3 bits -- maximum value = 7 */
  97         serialports=7;
  98     if (parallelports > 3)              /* 2 bits -- maximum value = 3 */
  99         parallelports=3;
 100
 101     SET_AX( context, (diskdrives << 6) | (serialports << 9) | (parallelports << 14) | 0x02 );
 102 }