msdos/int11.c

   1 /*
   2  * BIOS interrupt 11h handler
   3  */
   4
   5 #include "config.h"
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11 #include "windef.h"
  12 #include "miscemu.h"
  13 #include "msdos.h"
  14 #include "debugtools.h"
  15 #include "options.h"
  16
  17 /**********************************************************************
  18  *          INT_Int11Handler (WPROCS.117)
  19  *
  20  * Handler for int 11h (get equipment list).
  21  */
  22 void WINAPI INT_Int11Handler( CONTEXT86 *context )
  23 {
  24     int diskdrives = 0;
  25     int parallelports = 0;
  26     int serialports = 0;
  27     int x;
  28
  29 /* borrowed from Ralph Brown's interrupt lists
  30
  31                     bits 15-14: number of parallel devices
  32                     bit     13: [Conv] Internal modem
  33                     bit     12: reserved
  34                     bits 11- 9: number of serial devices
  35                     bit      8: reserved
  36                     bits  7- 6: number of diskette drives minus one
  37                     bits  5- 4: Initial video mode:
  38                                     00b = EGA,VGA,PGA
  39                                     01b = 40 x 25 color
  40                                     10b = 80 x 25 color
  41                                     11b = 80 x 25 mono
  42                     bit      3: reserved
  43                     bit      2: [PS] =1 if pointing device
  44                                 [non-PS] reserved
  45                     bit      1: =1 if math co-processor
  46                     bit      0: =1 if diskette available for boot
  47 */
  48 /*  Currently the only of these bits correctly set are:
  49                 bits 15-14              } Added by William Owen Smith,
  50                 bits 11-9               } wos@dcs.warwick.ac.uk
  51                 bits 7-6
  52                 bit  2                  (always set)
  53 */
  54
  55     if (GetDriveTypeA("A:\\") == DRIVE_REMOVABLE) diskdrives++;
  56     if (GetDriveTypeA("B:\\") == DRIVE_REMOVABLE) diskdrives++;
  57     if (diskdrives) diskdrives--;
  58
  59     for (x=0; x < 9; x++)
  60     {
  61         char temp[16],name[16];
  62
  63         sprintf(name,"COM%d",x+1);
  64         PROFILE_GetWineIniString("serialports",name,"*",temp,sizeof temp);
  65         if(strcmp(temp,"*"))
  66             serialports++;
  67
  68         sprintf(name,"LPT%d",x+1);
  69         PROFILE_GetWineIniString("parallelports",name,"*",temp,sizeof temp);
  70         if(strcmp(temp,"*"))
  71             parallelports++;
  72     }
  73     if (serialports > 7)                /* 3 bits -- maximum value = 7 */
  74         serialports=7;
  75     if (parallelports > 3)              /* 2 bits -- maximum value = 3 */
  76         parallelports=3;
  77
  78     AX_reg(context) = (diskdrives << 6) | (serialports << 9) |
  79                       (parallelports << 14) | 0x02;
  80 }