Sweden-Number/msdos/int2f.c

189 lines
5.3 KiB
C

/*
* DOS interrupt 2fh handler
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ldt.h"
#include "drive.h"
#include "msdos.h"
#include "miscemu.h"
#include "module.h"
#include "options.h"
#include "stddebug.h"
/* #define DEBUG_INT */
#include "debug.h"
/* base WPROCS.DLL ordinal number for VxDs */
#define VXD_BASE 400
static void do_int2f_16( CONTEXT *context );
void do_mscdex( CONTEXT *context );
/**********************************************************************
* INT_Int2fHandler
*
* Handler for int 2fh (multiplex).
*/
void INT_Int2fHandler( CONTEXT *context )
{
switch(AH_reg(context))
{
case 0x10:
AL_reg(context) = 0xff; /* share is installed */
break;
case 0x15: /* mscdex */
do_mscdex(context);
break;
case 0x16:
do_int2f_16( context );
break;
case 0x4a:
switch(AL_reg(context))
{
case 0x10: /* smartdrv */
break; /* not installed */
case 0x11: /* dblspace */
break; /* not installed */
case 0x12: /* realtime compression interface */
break; /* not installed */
default:
INT_BARF( context, 0x2f );
}
break;
case 0xb7: /* append */
AL_reg(context) = 0; /* not installed */
break;
default:
INT_BARF( context, 0x2f );
break;
}
}
/**********************************************************************
* do_int2f_16
*/
static void do_int2f_16( CONTEXT *context )
{
DWORD addr;
switch(AL_reg(context))
{
case 0x00: /* Windows enhanced mode installation check */
AX_reg(context) = (Options.mode == MODE_ENHANCED) ? WINVERSION : 0;
break;
case 0x0a: /* Get Windows version and type */
AX_reg(context) = 0;
BX_reg(context) = (WINVERSION >> 8) | ((WINVERSION << 8) & 0xff00);
CX_reg(context) = (Options.mode == MODE_ENHANCED) ? 3 : 2;
break;
case 0x80: /* Release time-slice */
AL_reg(context) = 0;
/* FIXME: We need to do something that lets some other process run
here. */
sleep(0);
break;
case 0x83: /* Return Current Virtual Machine ID */
/* Virtual Machines are usually created/destroyed when Windows runs
* DOS programs. Since we never do, we are always in the System VM.
* According to Ralf Brown's Interrupt List, never return 0. But it
* seems to work okay (returning 0), just to be sure we return 1.
*/
BX_reg(context) = 1; /* VM 1 is probably the System VM */
break;
case 0x84: /* Get device API entry point */
addr = (DWORD)MODULE_GetEntryPoint( GetModuleHandle("WPROCS"),
VXD_BASE + BX_reg(context) );
if (!addr) /* not supported */
{
fprintf( stderr,"Application attempted to access VxD %04x\n",
BX_reg(context) );
fprintf( stderr,"This device is not known to Wine.");
fprintf( stderr,"Expect a failure now\n");
}
ES_reg(context) = SELECTOROF(addr);
DI_reg(context) = OFFSETOF(addr);
break;
case 0x86: /* DPMI detect mode */
AX_reg(context) = 0; /* Running under DPMI */
break;
/* FIXME: is this right? Specs say that this should only be callable
in real (v86) mode which we never enter. */
case 0x87: /* DPMI installation check */
AX_reg(context) = 0x0000; /* DPMI Installed */
BX_reg(context) = 0x0001; /* 32bits available */
CL_reg(context) = runtime_cpu();
DX_reg(context) = 0x005a; /* DPMI major/minor 0.90 */
SI_reg(context) = 0; /* # of para. of DOS extended private data */
ES_reg(context) = 0; /* ES:DI is DPMI switch entry point */
DI_reg(context) = 0;
break;
case 0x8a: /* DPMI get vendor-specific API entry point. */
/* The 1.0 specs say this should work with all 0.9 hosts. */
break;
default:
INT_BARF( context, 0x2f );
}
}
void do_mscdex( CONTEXT *context )
{
int drive, count;
char *p;
switch(AL_reg(context))
{
case 0x00: /* Installation check */
/* Count the number of contiguous CDROM drives
*/
for (drive = count = 0; drive < MAX_DOS_DRIVES; drive++)
{
if (DRIVE_GetType(drive) == TYPE_CDROM)
{
while (DRIVE_GetType(drive + count) == TYPE_CDROM) count++;
break;
}
}
BX_reg(context) = count;
CX_reg(context) = (drive < MAX_DOS_DRIVES) ? drive : 0;
break;
case 0x0B: /* drive check */
AX_reg(context) = (DRIVE_GetType(CX_reg(context)) == TYPE_CDROM);
BX_reg(context) = 0xADAD;
break;
case 0x0C: /* get version */
BX_reg(context) = 0x020a;
break;
case 0x0D: /* get drive letters */
p = PTR_SEG_OFF_TO_LIN(ES_reg(context), BX_reg(context));
memset( p, 0, MAX_DOS_DRIVES );
for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
{
if (DRIVE_GetType(drive) == TYPE_CDROM) *p++ = drive;
}
break;
default:
fprintf(stderr, "Unimplemented MSCDEX function 0x%02.2X.\n", AL_reg(context));
break;
}
}