msdos/int11.c

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