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wine/dlls/winedos/int13.c

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/*
* BIOS interrupt 13h handler
*
* Copyright 1997 Andreas Mohr
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <stdlib.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#include <fcntl.h>
#ifdef linux
# include <linux/fd.h>
#endif
#include "dosexe.h"
#include "wine/server.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(int);
/*
* Status of last int13 operation.
*/
static BYTE INT13_last_status;
/**********************************************************************
* INT13_SetStatus
*
* Write status to AH register and set carry flag on error (AH != 0).
*
* Despite what Ralf Brown says, at least functions 0x06 and 0x07
* seem to set carry, too.
*/
static void INT13_SetStatus( CONTEXT86 *context, BYTE status )
{
INT13_last_status = status;
SET_AH( context, status );
if (status)
SET_CFLAG( context );
else
RESET_CFLAG( context );
}
/**********************************************************************
* INT13_ReadFloppyParams
*
* Read floppy disk parameters.
*/
static void INT13_ReadFloppyParams( CONTEXT86 *context )
{
#ifdef linux
static const BYTE floppy_params[2][13] =
{
{ 0xaf, 0x02, 0x25, 0x02, 0x12, 0x1b, 0xff, 0x6c, 0xf6, 0x0f, 0x08 },
{ 0xaf, 0x02, 0x25, 0x02, 0x12, 0x1b, 0xff, 0x6c, 0xf6, 0x0f, 0x08 }
};
static const DWORD drive_type_info[7]={
0x0000, /* none */
0x2709, /* 360 K */
0x4f0f, /* 1.2 M */
0x4f09, /* 720 K */
0x4f12, /* 1.44 M */
0x4f24, /* 2.88 M */
0x4f24 /* 2.88 M */
};
unsigned int i;
unsigned int nr_of_drives = 0;
BYTE drive_nr = DL_reg( context );
int floppy_fd;
int r;
struct floppy_drive_params floppy_parm;
WCHAR root[] = {'A',':','\\',0}, drive_root[] = {'\\','\\','.','\\','A',':',0};
HANDLE h;
TRACE("in [ EDX=%08lx ]\n", context->Edx );
SET_AL( context, 0 );
SET_BX( context, 0 );
SET_CX( context, 0 );
SET_DH( context, 0 );
for (i = 0; i < MAX_DOS_DRIVES; i++, root[0]++)
if (GetDriveTypeW(root) == DRIVE_REMOVABLE) nr_of_drives++;
SET_DL( context, nr_of_drives );
if (drive_nr > 1) {
/* invalid drive ? */
INT13_SetStatus( context, 0x07 ); /* drive parameter activity failed */
return;
}
drive_root[4] = 'A' + drive_nr;
h = CreateFileW(drive_root, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (h == INVALID_HANDLE_VALUE ||
wine_server_handle_to_fd(h, GENERIC_READ, &floppy_fd, NULL, NULL))
{
WARN("Can't determine floppy geometry !\n");
INT13_SetStatus( context, 0x07 ); /* drive parameter activity failed */
return;
}
r = ioctl(floppy_fd, FDGETDRVPRM, &floppy_parm);
close(floppy_fd);
CloseHandle(h);
if(r<0)
{
INT13_SetStatus( context, 0x07 ); /* drive parameter activity failed */
return;
}
SET_BL( context, floppy_parm.cmos );
/*
* CH = low eight bits of max cyl
* CL = max sec nr (bits 5-0),
* hi two bits of max cyl (bits 7-6)
* DH = max head nr
*/
if(BL_reg( context ) && BL_reg( context ) < 7)
{
SET_DH( context, 0x01 );
SET_CX( context, drive_type_info[BL_reg( context )] );
}
context->Edi = (DWORD)floppy_params[drive_nr];
if(!context->Edi)
{
ERR("Get floppy params failed for drive %d\n", drive_nr);
INT13_SetStatus( context, 0x07 ); /* drive parameter activity failed */
return;
}
TRACE("out [ EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx EDI=%08lx ]\n",
context->Eax, context->Ebx, context->Ecx, context->Edx, context->Edi);
INT13_SetStatus( context, 0x00 ); /* success */
/* FIXME: Word exits quietly if we return with no error. Why? */
FIXME("Returned ERROR!\n");
SET_CFLAG( context );
#else
INT13_SetStatus( context, 0x01 ); /* invalid function */
#endif
}
/**********************************************************************
* DOSVM_Int13Handler (WINEDOS16.119)
*
* Handler for int 13h (disk I/O).
*/
void WINAPI DOSVM_Int13Handler( CONTEXT86 *context )
{
TRACE( "AH=%02x\n", AH_reg( context ) );
switch( AH_reg( context ) )
{
case 0x00: /* RESET DISK SYSTEM */
INT13_SetStatus( context, 0x00 ); /* success */
break;
case 0x01: /* STATUS OF DISK SYSTEM */
INT13_SetStatus( context, INT13_last_status );
break;
case 0x02: /* READ SECTORS INTO MEMORY */
SET_AL( context, 0 ); /* number of sectors transferred */
INT13_SetStatus( context, 0x00 ); /* success */
break;
case 0x03: /* WRITE SECTORS FROM MEMORY */
SET_AL( context, 0 ); /* number of sectors transferred */
INT13_SetStatus( context, 0x00 ); /* success */
break;
case 0x04: /* VERIFY DISK SECTOR(S) */
SET_AL( context, 0 ); /* number of sectors verified */
INT13_SetStatus( context, 0x00 ); /* success */
break;
case 0x05: /* FORMAT TRACK */
case 0x06: /* FORMAT TRACK AND SET BAD SECTOR FLAGS */
case 0x07: /* FORMAT DRIVE STARTING AT GIVEN TRACK */
INT13_SetStatus( context, 0x0c ); /* unsupported track or invalid media */
break;
case 0x08: /* GET DRIVE PARAMETERS */
if (DL_reg( context ) & 0x80)
{
/* hard disk ? */
INT13_SetStatus( context, 0x07 ); /* drive parameter activity failed */
}
else
{
/* floppy disk */
INT13_ReadFloppyParams( context );
}
break;
case 0x09: /* INITIALIZE CONTROLLER WITH DRIVE PARAMETERS */
case 0x0a: /* FIXED DISK - READ LONG */
case 0x0b: /* FIXED DISK - WRITE LONG */
case 0x0c: /* SEEK TO CYLINDER */
case 0x0d: /* ALTERNATE RESET HARD DISK */
INT13_SetStatus( context, 0x00 ); /* success */
break;
case 0x0e: /* READ SECTOR BUFFER */
case 0x0f: /* WRITE SECTOR BUFFER */
INT13_SetStatus( context, 0x01 ); /* invalid function */
break;
case 0x10: /* CHECK IF DRIVE READY */
case 0x11: /* RECALIBRATE DRIVE */
INT13_SetStatus( context, 0x00 ); /* success */
break;
case 0x12: /* CONTROLLER RAM DIAGNOSTIC */
case 0x13: /* DRIVE DIAGNOSTIC */
INT13_SetStatus( context, 0x01 ); /* invalid function */
break;
case 0x14: /* CONTROLLER INTERNAL DIAGNOSTIC */
INT13_SetStatus( context, 0x00 ); /* success */
break;
case 0x15: /* GET DISK TYPE */
if (DL_reg( context ) & 0x80)
{
/* hard disk ? */
INT13_SetStatus( context, 0x00 ); /* success */
/* type is fixed disk, overwrites status */
SET_AH( context, 0x03 );
}
else
{
/* floppy disk */
INT13_SetStatus( context, 0x00 ); /* success */
/* type is floppy with change detection, overwrites status */
SET_AH( context, 0x02 );
}
break;
case 0x16: /* FLOPPY - CHANGE OF DISK STATUS */
INT13_SetStatus( context, 0x00 ); /* success */
break;
case 0x17: /* SET DISK TYPE FOR FORMAT */
if (DL_reg( context ) < 4)
INT13_SetStatus( context, 0x00 ); /* successful completion */
else
INT13_SetStatus( context, 0x01 ); /* error */
break;
case 0x18: /* SET MEDIA TYPE FOR FORMAT */
if (DL_reg( context ) < 4)
INT13_SetStatus( context, 0x00 ); /* success */
else
INT13_SetStatus( context, 0x01 ); /* error */
break;
case 0x19: /* FIXED DISK - PARK HEADS */
INT13_SetStatus( context, 0x00 ); /* success */
break;
default:
INT_BARF( context, 0x13 );
INT13_SetStatus( context, 0x01 ); /* invalid function */
}
}
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