msdos/int11.c

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