dlls/winedos/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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdarg.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "dosexe.h"
  32 #include "wine/unicode.h"
  33 #include "wine/debug.h"
  34
  35
  36 /**********************************************************************
  37  *          DOSVM_Int11Handler (WINEDOS16.117)
  38  *
  39  * Handler for int 11h (get equipment list).
  40  *
  41  *
  42  * Borrowed from Ralph Brown's interrupt lists:
  43  *
  44  *   bits 15-14: number of parallel devices
  45  *   bit     13: [Conv] Internal modem
  46  *   bit     12: reserved
  47  *   bits 11- 9: number of serial devices
  48  *   bit      8: reserved
  49  *   bits  7- 6: number of diskette drives minus one
  50  *   bits  5- 4: Initial video mode:
  51  *                 00b = EGA,VGA,PGA
  52  *                 01b = 40 x 25 color
  53  *                 10b = 80 x 25 color
  54  *                 11b = 80 x 25 mono
  55  *   bit      3: reserved
  56  *   bit      2: [PS] =1 if pointing device
  57  *               [non-PS] reserved
  58  *   bit      1: =1 if math co-processor
  59  *   bit      0: =1 if diskette available for boot
  60  *
  61  *
  62  * Currently the only of these bits correctly set are:
  63  *
  64  *   bits 15-14   } Added by William Owen Smith,
  65  *   bits 11-9    } wos@dcs.warwick.ac.uk
  66  *   bits 7-6
  67  *   bit  2       (always set)  ( bit 2 = 4 )
  68  *   bit  1       } Robert 'Admiral' Coeyman
  69  *                  All *nix systems either have a math processor or
  70  *                   emulate one.
  71  */
  72 void WINAPI DOSVM_Int11Handler( CONTEXT86 *context )
  73 {
  74     int diskdrives = 0;
  75     int parallelports = 0;
  76     int serialports = 0;
  77     int x;
  78
  79     if (GetDriveTypeA("A:\\") == DRIVE_REMOVABLE) diskdrives++;
  80     if (GetDriveTypeA("B:\\") == DRIVE_REMOVABLE) diskdrives++;
  81     if (diskdrives) diskdrives--;
  82
  83     for (x=0; x < 9; x++)
  84     {
  85         HANDLE handle;
  86         char file[10];
  87
  88         /* serial port name */
  89         sprintf( file, "\\\\.\\COM%d", x+1 );
  90         handle = CreateFileA( file, 0, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 );
  91         if (handle != INVALID_HANDLE_VALUE)
  92         {
  93             CloseHandle( handle );
  94             serialports++;
  95         }
  96
  97         sprintf( file, "\\\\.\\LPT%d", x+1 );
  98         handle = CreateFileA( file, 0, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 );
  99         if (handle != INVALID_HANDLE_VALUE)
 100         {
 101             CloseHandle( handle );
 102             parallelports++;
 103         }
 104     }
 105
 106     if (serialports > 7) /* 3 bits -- maximum value = 7 */
 107         serialports = 7;
 108
 109     if (parallelports > 3) /* 2 bits -- maximum value = 3 */
 110         parallelports = 3;
 111
 112     SET_AX( context,
 113             (diskdrives << 6) | (serialports << 9) | (parallelports << 14) | 0x06 );
 114 }