miscemu/int2f.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include "registers.h"
   5 #include "wine.h"
   6 #include "msdos.h"
   7 #include "miscemu.h"
   8 #include "module.h"
   9 #include "options.h"
  10 #include "stddebug.h"
  11 /* #define DEBUG_INT */
  12 #include "debug.h"
  13
  14   /* base WINPROC module number for VxDs */
  15 #define VXD_BASE 400
  16
  17 static void do_int2f_16(struct sigcontext_struct *context);
  18
  19 /**********************************************************************
  20  *          INT_Int2fHandler
  21  *
  22  * Handler for int 2fh (multiplex).
  23  */
  24 void INT_Int2fHandler( struct sigcontext_struct context )
  25 {
  26     switch(AH_reg(&context))
  27     {
  28     case 0x10:
  29         AL_reg(&context) = 0xff; /* share is installed */
  30         break;
  31
  32     case 0x15: /* mscdex */
  33         /* ignore requests */
  34         break;
  35
  36     case 0x16:
  37         do_int2f_16( &context );
  38         break;
  39
  40     case 0x4a:
  41         switch(AL_reg(&context))
  42         {
  43         case 0x12:  /* realtime compression interface */
  44             break;  /* not installed */
  45         default:
  46             INT_BARF( &context, 0x2f );
  47         }
  48         break;
  49     default:
  50         INT_BARF( &context, 0x2f );
  51         break;
  52     }
  53 }
  54
  55
  56 /**********************************************************************
  57  *          do_int2f_16
  58  */
  59 static void do_int2f_16(struct sigcontext_struct *context)
  60 {
  61     DWORD addr;
  62
  63     switch(AL_reg(context))
  64     {
  65     case 0x00:  /* Windows enhanced mode installation check */
  66         AX_reg(context) = Options.enhanced ? WINVERSION : 0;
  67         break;
  68
  69     case 0x0a:  /* Get Windows version and type */
  70         AX_reg(context) = 0;
  71         BX_reg(context) = (WINVERSION >> 8) | ((WINVERSION << 8) & 0xff00);
  72         CX_reg(context) = Options.enhanced ? 3 : 2;
  73         break;
  74
  75     case 0x80:  /* Release time-slice */
  76         AL_reg(context) = 0;
  77         /* FIXME: We need to do something that lets some other process run
  78            here.  */
  79         sleep(0);
  80         break;
  81
  82     case 0x83:  /* Return Current Virtual Machine ID */
  83         /* Virtual Machines are usually created/destroyed when Windows runs
  84          * DOS programs. Since we never do, we are always in the System VM.
  85          * According to Ralf Brown's Interrupt List, never return 0. But it
  86          * seems to work okay (returning 0), just to be sure we return 1.
  87          */
  88         BX_reg(context) = 1; /* VM 1 is probably the System VM */
  89         break;
  90
  91     case 0x84:  /* Get device API entry point */
  92         addr = MODULE_GetEntryPoint( GetModuleHandle("WINPROCS"),
  93                                      VXD_BASE + BX_reg(context) );
  94         if (!addr)  /* not supported */
  95         {
  96             fprintf( stderr,"Application attempted to access VxD %04x\n",
  97                      BX_reg(context) );
  98             fprintf( stderr,"This device is not known to Wine.");
  99             fprintf( stderr,"Expect a failure now\n");
 100         }
 101         ES_reg(context) = SELECTOROF(addr);
 102         DI_reg(context) = OFFSETOF(addr);
 103         break;
 104
 105     case 0x86:  /* DPMI detect mode */
 106         AX_reg(context) = 0;  /* Running under DPMI */
 107         break;
 108
 109     /* FIXME: is this right?  Specs say that this should only be callable
 110        in real (v86) mode which we never enter.  */
 111     case 0x87:  /* DPMI installation check */
 112         AX_reg(context) = 0x0000; /* DPMI Installed */
 113         BX_reg(context) = 0x0001; /* 32bits available */
 114         CL_reg(context) = runtime_cpu();
 115         DX_reg(context) = 0x005a; /* DPMI major/minor 0.90 */
 116         SI_reg(context) = 0;      /* # of para. of DOS extended private data */
 117         ES_reg(context) = 0;      /* ES:DI is DPMI switch entry point */
 118         DI_reg(context) = 0;
 119         break;
 120
 121     case 0x8a:  /* DPMI get vendor-specific API entry point. */
 122         /* The 1.0 specs say this should work with all 0.9 hosts.  */
 123         break;
 124
 125     default:
 126         INT_BARF( context, 0x2f );
 127     }
 128 }