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 context )
  20 {
  21     switch(AH_reg(&context))
  22     {
  23         case 0x10:
  24                 AL_reg(&context) = 0xff; /* share is installed */
  25                 break;
  26
  27         case 0x15: /* mscdex */
  28                 /* ignore requests */
  29                 break;
  30
  31         case 0x16:
  32                 do_int2f_16( &context );
  33                 break;
  34         default:
  35                 INT_BARF( &context, 0x2f );
  36             }
  37 }
  38
  39
  40 static void do_int2f_16(struct sigcontext_struct *context)
  41 {
  42     switch(AL_reg(context))
  43     {
  44     case 0x00:  /* Windows enhanced mode installation check */
  45         AX_reg(context) = Options.enhanced ? WINVERSION : 0;
  46         break;
  47
  48     case 0x0a:  /* Get Windows version and type */
  49         AX_reg(context) = 0;
  50         BX_reg(context) = (WINVERSION >> 8) | ((WINVERSION << 8) & 0xff00);
  51         CX_reg(context) = Options.enhanced ? 3 : 2;
  52         break;
  53
  54     case 0x80:  /* Release time-slice */
  55         break;  /* nothing to do */
  56
  57     case 0x86:  /* DPMI detect mode */
  58         AX_reg(context) = 0;  /* Running under DPMI */
  59         break;
  60
  61     case 0x87:  /* DPMI installation check */
  62         AX_reg(context) = 0x0000; /* DPMI Installed */
  63         BX_reg(context) = 0x0001; /* 32bits available */
  64         CL_reg(context) = 0x03;   /* processor 386 */
  65         DX_reg(context) = 0x005a; /* DPMI major/minor 0.90 */
  66         SI_reg(context) = 0;      /* # of para. of DOS extended private data */
  67         ES_reg(context) = 0;      /* ES:DI is DPMI switch entry point */
  68         DI_reg(context) = 0;
  69         break;
  70
  71     default:
  72         INT_BARF( context, 0x2f );
  73     }
  74 }
  75
  76