miscemu/int2f.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include "registers.h"
   4 #include "wine.h"
   5 #include "msdos.h"
   6 #include "miscemu.h"
   7 #include "options.h"
   8 #include "stddebug.h"
   9 /* #define DEBUG_INT */
  10 #include "debug.h"
  11
  12 static void do_int2f_16(struct sigcontext_struct *context);
  13
  14 /**********************************************************************
  15  *          INT_Int2fHandler
  16  *
  17  * Handler for int 2fh (multiplex).
  18  */
  19 void INT_Int2fHandler( struct sigcontext_struct sigcontext )
  20 {
  21 #define context (&sigcontext)
  22     switch(AH)
  23     {
  24         case 0x10:
  25                 AL = 0xff; /* share is installed */
  26                 break;
  27
  28         case 0x15: /* mscdex */
  29                 /* ignore requests */
  30                 break;
  31
  32         case 0x16:
  33                 do_int2f_16( context );
  34                 break;
  35         default:
  36                 INT_BARF( 0x2f );
  37             }
  38 #undef context
  39 }
  40
  41
  42 static void do_int2f_16(struct sigcontext_struct *context)
  43 {
  44     switch(AL)
  45     {
  46     case 0x00:  /* Windows enhanced mode installation check */
  47         AX = Options.enhanced ? WINVERSION : 0;
  48         break;
  49
  50     case 0x0a:  /* Get Windows version and type */
  51         AX = 0;
  52         BX = (WINVERSION >> 8) | ((WINVERSION << 8) & 0xff00);
  53         CX = Options.enhanced ? 3 : 2;
  54         break;
  55
  56     case 0x80:  /* Release time-slice */
  57         break;  /* nothing to do */
  58
  59     case 0x86:  /* DPMI detect mode */
  60         AX = 0;  /* Running under DPMI */
  61         break;
  62
  63     case 0x87:  /* DPMI installation check */
  64         AX = 0x0000;  /* DPMI Installed */
  65         BX = 0x0001;  /* 32bits available */
  66         CL = 0x03;    /* processor 386 */
  67         DX = 0x005a;  /* DPMI major/minor 0.90 */
  68         SI = 0;       /* # of para. of DOS extended private data */
  69         ES = 0;       /* ES:DI is DPMI switch entry point */
  70         DI = 0;
  71         break;
  72
  73     default:
  74         INT_BARF( 0x2f );
  75     }
  76 }
  77
  78