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1cfc850b2c
wine/dlls/winedos/int21.c
Jukka Heinonen 1cfc850b2c Move int08 stub and LOL to upper memory. 
Move simple int21 functions to winedos.
2002-12-07 23:46:41 +00:00

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/*
* DOS interrupt 21h handler
*
* Copyright 1993, 1994 Erik Bos
* Copyright 1996 Alexandre Julliard
* Copyright 1997 Andreas Mohr
* Copyright 1998 Uwe Bonnes
* Copyright 1998, 1999 Ove Kaaven
*
* 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 "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "wine/winbase16.h"
#include "dosexe.h"
#include "miscemu.h"
#include "msdos.h"
#include "file.h"
#include "winerror.h"
#include "wine/unicode.h"
#include "wine/debug.h"
/*
* FIXME: Delete this reference when all int21 code has been moved to winedos.
*/
extern void WINAPI INT_Int21Handler( CONTEXT86 *context );
WINE_DEFAULT_DEBUG_CHANNEL(int21);
/***********************************************************************
* INT21_GetPSP
*
* Handler for functions 0x51 and 0x62.
*/
static void INT21_GetPSP( CONTEXT86 *context )
{
TRACE( "GET CURRENT PSP ADDRESS (%02x)\n", AH_reg(context) );
/*
* FIXME: should we return the original DOS PSP upon
* Windows startup ?
*/
if (!ISV86(context) && DOSVM_IsWin16())
SET_BX( context, LOWORD(GetCurrentPDB16()) );
else
SET_BX( context, DOSVM_psp );
}
/***********************************************************************
* INT21_Ioctl
*
* Handler for function 0x44.
*/
static void INT21_Ioctl( CONTEXT86 *context )
{
static const WCHAR emmxxxx0W[] = {'E','M','M','X','X','X','X','0',0};
const DOS_DEVICE *dev = DOSFS_GetDeviceByHandle(
DosFileHandleToWin32Handle(BX_reg(context)) );
if (dev && !strcmpiW( dev->name, emmxxxx0W )) {
EMS_Ioctl_Handler(context);
return;
}
switch (AL_reg(context))
{
case 0x0b: /* SET SHARING RETRY COUNT */
TRACE("IOCTL - SET SHARING RETRY COUNT pause %d retries %d\n",
CX_reg(context), DX_reg(context));
if (!CX_reg(context))
{
SET_AX( context, 1 );
SET_CFLAG(context);
break;
}
DOSMEM_LOL()->sharing_retry_delay = CX_reg(context);
if (!DX_reg(context))
DOSMEM_LOL()->sharing_retry_count = DX_reg(context);
RESET_CFLAG(context);
break;
default:
INT_Int21Handler( context );
}
}
/***********************************************************************
* INT21_GetExtendedError
*/
static void INT21_GetExtendedError( CONTEXT86 *context )
{
BYTE class, action, locus;
WORD error = GetLastError();
switch(error)
{
case ERROR_SUCCESS:
class = action = locus = 0;
break;
case ERROR_DIR_NOT_EMPTY:
class = EC_Exists;
action = SA_Ignore;
locus = EL_Disk;
break;
case ERROR_ACCESS_DENIED:
class = EC_AccessDenied;
action = SA_Abort;
locus = EL_Disk;
break;
case ERROR_CANNOT_MAKE:
class = EC_AccessDenied;
action = SA_Abort;
locus = EL_Unknown;
break;
case ERROR_DISK_FULL:
case ERROR_HANDLE_DISK_FULL:
class = EC_MediaError;
action = SA_Abort;
locus = EL_Disk;
break;
case ERROR_FILE_EXISTS:
case ERROR_ALREADY_EXISTS:
class = EC_Exists;
action = SA_Abort;
locus = EL_Disk;
break;
case ERROR_FILE_NOT_FOUND:
class = EC_NotFound;
action = SA_Abort;
locus = EL_Disk;
break;
case ER_GeneralFailure:
class = EC_SystemFailure;
action = SA_Abort;
locus = EL_Unknown;
break;
case ERROR_INVALID_DRIVE:
class = EC_MediaError;
action = SA_Abort;
locus = EL_Disk;
break;
case ERROR_INVALID_HANDLE:
class = EC_ProgramError;
action = SA_Abort;
locus = EL_Disk;
break;
case ERROR_LOCK_VIOLATION:
class = EC_AccessDenied;
action = SA_Abort;
locus = EL_Disk;
break;
case ERROR_NO_MORE_FILES:
class = EC_MediaError;
action = SA_Abort;
locus = EL_Disk;
break;
case ER_NoNetwork:
class = EC_NotFound;
action = SA_Abort;
locus = EL_Network;
break;
case ERROR_NOT_ENOUGH_MEMORY:
class = EC_OutOfResource;
action = SA_Abort;
locus = EL_Memory;
break;
case ERROR_PATH_NOT_FOUND:
class = EC_NotFound;
action = SA_Abort;
locus = EL_Disk;
break;
case ERROR_SEEK:
class = EC_NotFound;
action = SA_Ignore;
locus = EL_Disk;
break;
case ERROR_SHARING_VIOLATION:
class = EC_Temporary;
action = SA_Retry;
locus = EL_Disk;
break;
case ERROR_TOO_MANY_OPEN_FILES:
class = EC_ProgramError;
action = SA_Abort;
locus = EL_Disk;
break;
default:
FIXME("Unknown error %d\n", error );
class = EC_SystemFailure;
action = SA_Abort;
locus = EL_Unknown;
break;
}
TRACE("GET EXTENDED ERROR code 0x%02x class 0x%02x action 0x%02x locus %02x\n",
error, class, action, locus );
SET_AX( context, error );
SET_BH( context, class );
SET_BL( context, action );
SET_CH( context, locus );
}
/***********************************************************************
* DOSVM_Int21Handler (WINEDOS16.133)
*
* Interrupt 0x21 handler.
*/
void WINAPI DOSVM_Int21Handler( CONTEXT86 *context )
{
BOOL bSetDOSExtendedError = FALSE;
TRACE( "AX=%04x BX=%04x CX=%04x DX=%04x "
"SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
AX_reg(context), BX_reg(context),
CX_reg(context), DX_reg(context),
SI_reg(context), DI_reg(context),
(WORD)context->SegDs, (WORD)context->SegEs,
context->EFlags );
/*
* Extended error is used by (at least) functions 0x2f to 0x62.
* Function 0x59 returns extended error and error should not
* be cleared before handling the function.
*/
if (AH_reg(context) >= 0x2f && AH_reg(context) != 0x59)
SetLastError(0);
RESET_CFLAG(context); /* Not sure if this is a good idea. */
switch(AH_reg(context))
{
case 0x00: /* TERMINATE PROGRAM */
TRACE("TERMINATE PROGRAM\n");
if (DOSVM_IsWin16())
ExitThread( 0 );
else
MZ_Exit( context, FALSE, 0 );
break;
case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
{
BYTE ascii;
TRACE("DIRECT CHARACTER INPUT WITH ECHO\n");
DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
SET_AL( context, ascii );
DOSVM_PutChar(AL_reg(context));
}
break;
case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
TRACE("Write Character to Standard Output\n");
DOSVM_PutChar(DL_reg(context));
break;
case 0x03: /* READ CHARACTER FROM STDAUX */
case 0x04: /* WRITE CHARACTER TO STDAUX */
case 0x05: /* WRITE CHARACTER TO PRINTER */
INT_BARF( context, 0x21 );
break;
case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
/* FIXME: Use DOSDEV_Peek/Read/Write(DOSDEV_Console(),...) !! */
if (DL_reg(context) == 0xff) {
static char scan = 0;
TRACE("Direct Console Input\n");
if (scan) {
/* return pending scancode */
SET_AL( context, scan );
RESET_ZFLAG(context);
scan = 0;
} else {
BYTE ascii;
if (DOSVM_Int16ReadChar(&ascii,&scan,TRUE)) {
DOSVM_Int16ReadChar(&ascii,&scan,FALSE);
/* return ASCII code */
SET_AL( context, ascii );
RESET_ZFLAG(context);
/* return scan code on next call only if ascii==0 */
if (ascii) scan = 0;
} else {
/* nothing pending, clear everything */
SET_AL( context, 0 );
SET_ZFLAG(context);
scan = 0; /* just in case */
}
}
} else {
TRACE("Direct Console Output\n");
DOSVM_PutChar(DL_reg(context));
}
break;
case 0x07: /* DIRECT CHARACTER INPUT WITHOUT ECHO */
{
BYTE ascii;
/* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
TRACE("DIRECT CHARACTER INPUT WITHOUT ECHO\n");
DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
SET_AL( context, ascii );
}
break;
case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
{
BYTE ascii;
/* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
TRACE("CHARACTER INPUT WITHOUT ECHO\n");
DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
SET_AL( context, ascii );
}
break;
case 0x09: /* WRITE STRING TO STANDARD OUTPUT */
INT_Int21Handler( context );
break;
case 0x0a: /* BUFFERED INPUT */
INT_Int21Handler( context );
break;
case 0x0b: /* GET STDIN STATUS */
TRACE( "GET STDIN STATUS\n" );
{
BIOSDATA *data = BIOS_DATA;
if(data->FirstKbdCharPtr == data->NextKbdCharPtr)
SET_AL( context, 0 );
else
SET_AL( context, 0xff );
}
break;
case 0x0c: /* FLUSH BUFFER AND READ STANDARD INPUT */
{
BYTE al = AL_reg(context); /* Input function to execute after flush. */
TRACE( "FLUSH BUFFER AND READ STANDARD INPUT - 0x%02x\n", al );
/* FIXME: buffers are not flushed */
/*
* If AL is one of 0x01, 0x06, 0x07, 0x08, or 0x0a,
* int21 function identified by AL will be called.
*/
if(al == 0x01 || al == 0x06 || al == 0x07 || al == 0x08 || al == 0x0a)
{
SET_AH( context, al );
DOSVM_Int21Handler( context );
}
}
break;
case 0x0d: /* DISK BUFFER FLUSH */
TRACE("DISK BUFFER FLUSH ignored\n");
break;
case 0x0e: /* SELECT DEFAULT DRIVE */
INT_Int21Handler( context );
break;
case 0x0f: /* OPEN FILE USING FCB */
case 0x10: /* CLOSE FILE USING FCB */
INT_BARF( context, 0x21 );
break;
case 0x11: /* FIND FIRST MATCHING FILE USING FCB */
case 0x12: /* FIND NEXT MATCHING FILE USING FCB */
case 0x13: /* DELETE FILE USING FCB */
INT_Int21Handler( context );
break;
case 0x14: /* SEQUENTIAL READ FROM FCB FILE */
case 0x15: /* SEQUENTIAL WRITE TO FCB FILE */
case 0x16: /* CREATE OR TRUNCATE FILE USING FCB */
INT_BARF( context, 0x21 );
break;
case 0x17: /* RENAME FILE USING FCB */
INT_Int21Handler( context );
break;
case 0x18: /* NULL FUNCTION FOR CP/M COMPATIBILITY */
SET_AL( context, 0 );
break;
case 0x19: /* GET CURRENT DEFAULT DRIVE */
case 0x1a: /* SET DISK TRANSFER AREA ADDRESS */
case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */
case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */
INT_Int21Handler( context );
break;
case 0x1d: /* NULL FUNCTION FOR CP/M COMPATIBILITY */
case 0x1e: /* NULL FUNCTION FOR CP/M COMPATIBILITY */
SET_AL( context, 0 );
break;
case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
INT_Int21Handler( context );
break;
case 0x20: /* NULL FUNCTION FOR CP/M COMPATIBILITY */
SET_AL( context, 0 );
break;
case 0x21: /* READ RANDOM RECORD FROM FCB FILE */
case 0x22: /* WRITE RANDOM RECORD TO FCB FILE */
case 0x23: /* GET FILE SIZE FOR FCB */
case 0x24: /* SET RANDOM RECORD NUMBER FOR FCB */
INT_BARF( context, 0x21 );
break;
case 0x25: /* SET INTERRUPT VECTOR */
TRACE("SET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
{
FARPROC16 ptr = (FARPROC16)MAKESEGPTR( context->SegDs, DX_reg(context) );
if (!ISV86(context) && DOSVM_IsWin16())
DOSVM_SetPMHandler16( AL_reg(context), ptr );
else
DOSVM_SetRMHandler( AL_reg(context), ptr );
}
break;
case 0x26: /* CREATE NEW PROGRAM SEGMENT PREFIX */
case 0x27: /* RANDOM BLOCK READ FROM FCB FILE */
case 0x28: /* RANDOM BLOCK WRITE TO FCB FILE */
INT_BARF( context, 0x21 );
break;
case 0x29: /* PARSE FILENAME INTO FCB */
INT_Int21Handler( context );
break;
case 0x2a: /* GET SYSTEM DATE */
TRACE( "GET SYSTEM DATE\n" );
{
SYSTEMTIME systime;
GetLocalTime( &systime );
SET_CX( context, systime.wYear );
SET_DH( context, systime.wMonth );
SET_DL( context, systime.wDay );
SET_AL( context, systime.wDayOfWeek );
}
break;
case 0x2b: /* SET SYSTEM DATE */
FIXME("SetSystemDate(%02d/%02d/%04d): not allowed\n",
DL_reg(context), DH_reg(context), CX_reg(context) );
SET_AL( context, 0 ); /* Let's pretend we succeeded */
break;
case 0x2c: /* GET SYSTEM TIME */
TRACE( "GET SYSTEM TIME\n" );
{
SYSTEMTIME systime;
GetLocalTime( &systime );
SET_CL( context, systime.wHour );
SET_CH( context, systime.wMinute );
SET_DH( context, systime.wSecond );
SET_DL( context, systime.wMilliseconds / 10 );
}
break;
case 0x2d: /* SET SYSTEM TIME */
FIXME("SetSystemTime(%02d:%02d:%02d.%02d): not allowed\n",
CH_reg(context), CL_reg(context),
DH_reg(context), DL_reg(context) );
SET_AL( context, 0 ); /* Let's pretend we succeeded */
break;
case 0x2e: /* SET VERIFY FLAG */
TRACE("SET VERIFY FLAG ignored\n");
/* we cannot change the behaviour anyway, so just ignore it */
break;
case 0x2f: /* GET DISK TRANSFER AREA ADDRESS */
case 0x30: /* GET DOS VERSION */
INT_Int21Handler( context );
break;
case 0x31: /* TERMINATE AND STAY RESIDENT */
FIXME("TERMINATE AND STAY RESIDENT stub\n");
break;
case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */
case 0x33: /* MULTIPLEXED */
case 0x34: /* GET ADDRESS OF INDOS FLAG */
INT_Int21Handler( context );
break;
case 0x35: /* GET INTERRUPT VECTOR */
TRACE("GET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
{
FARPROC16 addr;
if (!ISV86(context) && DOSVM_IsWin16())
addr = DOSVM_GetPMHandler16( AL_reg(context) );
else
addr = DOSVM_GetRMHandler( AL_reg(context) );
context->SegEs = SELECTOROF(addr);
SET_BX( context, OFFSETOF(addr) );
}
break;
case 0x36: /* GET FREE DISK SPACE */
case 0x37: /* SWITCHAR */
INT_Int21Handler( context );
break;
case 0x38: /* GET COUNTRY-SPECIFIC INFORMATION */
TRACE( "GET COUNTRY-SPECIFIC INFORMATION for country 0x%02x\n",
AL_reg(context) );
SET_AX( context, 0x02 ); /* no country support available */
SET_CFLAG( context );
break;
case 0x39: /* "MKDIR" - CREATE SUBDIRECTORY */
case 0x3a: /* "RMDIR" - REMOVE SUBDIRECTORY */
case 0x3b: /* "CHDIR" - SET CURRENT DIRECTORY */
case 0x3c: /* "CREAT" - CREATE OR TRUNCATE FILE */
case 0x3d: /* "OPEN" - OPEN EXISTING FILE */
case 0x3e: /* "CLOSE" - CLOSE FILE */
case 0x3f: /* "READ" - READ FROM FILE OR DEVICE */
INT_Int21Handler( context );
break;
case 0x40: /* "WRITE" - WRITE TO FILE OR DEVICE */
/* Writes to stdout are handled here. */
if (!DOSVM_IsWin16() && BX_reg(context) == 1) {
BYTE *ptr = CTX_SEG_OFF_TO_LIN(context,
context->SegDs,
context->Edx);
int i;
for(i=0; i<CX_reg(context); i++)
DOSVM_PutChar(ptr[i]);
} else
INT_Int21Handler( context );
break;
case 0x41: /* "UNLINK" - DELETE FILE */
case 0x42: /* "LSEEK" - SET CURRENT FILE POSITION */
case 0x43: /* FILE ATTRIBUTES */
INT_Int21Handler( context );
break;
case 0x44: /* IOCTL */
INT21_Ioctl( context );
break;
case 0x45: /* "DUP" - DUPLICATE FILE HANDLE */
case 0x46: /* "DUP2", "FORCEDUP" - FORCE DUPLICATE FILE HANDLE */
case 0x47: /* "CWD" - GET CURRENT DIRECTORY */
INT_Int21Handler( context );
break;
case 0x48: /* ALLOCATE MEMORY */
TRACE( "ALLOCATE MEMORY for %d paragraphs\n", BX_reg(context) );
{
WORD selector = 0;
DWORD bytes = (DWORD)BX_reg(context) << 4;
if (!ISV86(context) && DOSVM_IsWin16())
{
DWORD rv = GlobalDOSAlloc16( bytes );
selector = LOWORD( rv );
}
else
DOSMEM_GetBlock( bytes, &selector );
if (selector)
SET_AX( context, selector );
else
{
SET_CFLAG(context);
SET_AX( context, 0x0008 ); /* insufficient memory */
SET_BX( context, DOSMEM_Available() >> 4 );
}
}
break;
case 0x49: /* FREE MEMORY */
TRACE( "FREE MEMORY segment %04lX\n", context->SegEs );
{
BOOL ok;
if (!ISV86(context) && DOSVM_IsWin16())
{
ok = !GlobalDOSFree16( context->SegEs );
/* If we don't reset ES_reg, we will fail in the relay code */
if (ok)
context->SegEs = 0;
}
else
ok = DOSMEM_FreeBlock( (void*)((DWORD)context->SegEs << 4) );
if (!ok)
{
TRACE("FREE MEMORY failed\n");
SET_CFLAG(context);
SET_AX( context, 0x0009 ); /* memory block address invalid */
}
}
break;
case 0x4a: /* RESIZE MEMORY BLOCK */
INT_Int21Handler( context );
break;
case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
if(DOSVM_IsWin16()) {
INT_Int21Handler( context );
break;
}
TRACE("EXEC %s\n", (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx ));
if (!MZ_Exec( context, CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx),
AL_reg(context), CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Ebx) ))
{
SET_AX( context, GetLastError() );
SET_CFLAG(context);
}
break;
case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
TRACE( "EXIT with return code %d\n", AL_reg(context) );
if (DOSVM_IsWin16())
ExitThread( AL_reg(context) );
else
MZ_Exit( context, FALSE, AL_reg(context) );
break;
case 0x4d: /* GET RETURN CODE */
TRACE("GET RETURN CODE (ERRORLEVEL)\n");
SET_AX( context, DOSVM_retval );
DOSVM_retval = 0;
break;
case 0x4e: /* "FINDFIRST" - FIND FIRST MATCHING FILE */
case 0x4f: /* "FINDNEXT" - FIND NEXT MATCHING FILE */
INT_Int21Handler( context );
break;
case 0x50: /* SET CURRENT PROCESS ID (SET PSP ADDRESS) */
TRACE("SET CURRENT PROCESS ID (SET PSP ADDRESS)\n");
DOSVM_psp = BX_reg(context);
break;
case 0x51: /* GET PSP ADDRESS */
INT21_GetPSP( context );
break;
case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
if (!ISV86(context) && DOSVM_IsWin16())
{
SEGPTR ptr = DOSMEM_LOL()->wine_pm_lol;
context->SegEs = SELECTOROF(ptr);
SET_BX( context, OFFSETOF(ptr) );
}
else
{
SEGPTR ptr = DOSMEM_LOL()->wine_rm_lol;
context->SegEs = SELECTOROF(ptr);
SET_BX( context, OFFSETOF(ptr) );
}
break;
case 0x54: /* Get Verify Flag */
TRACE("Get Verify Flag - Not Supported\n");
SET_AL( context, 0x00 ); /* pretend we can tell. 00h = off 01h = on */
break;
case 0x56: /* "RENAME" - RENAME FILE */
case 0x57: /* FILE DATE AND TIME */
INT_Int21Handler( context );
break;
case 0x58: /* GET OR SET MEMORY ALLOCATION STRATEGY */
TRACE( "GET OR SET MEMORY ALLOCATION STRATEGY, subfunction %d\n",
AL_reg(context) );
switch (AL_reg(context))
{
case 0x00: /* GET ALLOCATION STRATEGY */
SET_AX( context, 1 ); /* low memory best fit */
break;
case 0x01: /* SET ALLOCATION STRATEGY */
TRACE( "Set allocation strategy to %d - ignored\n",
BL_reg(context) );
break;
default:
INT_BARF( context, 0x21 );
break;
}
break;
case 0x59: /* GET EXTENDED ERROR INFO */
INT21_GetExtendedError( context );
break;
case 0x5a: /* CREATE TEMPORARY FILE */
case 0x5b: /* CREATE NEW FILE */
case 0x5c: /* "FLOCK" - RECORD LOCKING */
case 0x5d: /* NETWORK 5D */
case 0x5e: /* NETWORK 5E */
case 0x5f: /* NETWORK 5F */
case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */
case 0x61: /* UNUSED */
INT_Int21Handler( context );
break;
case 0x62: /* GET PSP ADDRESS */
INT21_GetPSP( context );
break;
case 0x63: /* MISC. LANGUAGE SUPPORT */
INT_Int21Handler( context );
break;
case 0x64: /* OS/2 DOS BOX */
INT_BARF( context, 0x21 );
SET_CFLAG(context);
break;
case 0x65: /* GET EXTENDED COUNTRY INFORMATION */
case 0x66: /* GLOBAL CODE PAGE TABLE */
INT_Int21Handler( context );
break;
case 0x67: /* SET HANDLE COUNT */
TRACE( "SET HANDLE COUNT to %d\n", BX_reg(context) );
if (SetHandleCount( BX_reg(context) ) < BX_reg(context) )
bSetDOSExtendedError = TRUE;
break;
case 0x68: /* "FFLUSH" - COMMIT FILE */
case 0x69: /* DISK SERIAL NUMBER */
case 0x6a: /* COMMIT FILE */
INT_Int21Handler( context );
break;
case 0x6b: /* NULL FUNCTION FOR CP/M COMPATIBILITY */
SET_AL( context, 0 );
break;
case 0x6c: /* EXTENDED OPEN/CREATE */
case 0x70: /* MS-DOS 7 (Windows95) - ??? (country-specific?)*/
case 0x71: /* MS-DOS 7 (Windows95) - LONG FILENAME FUNCTIONS */
case 0x72: /* MS-DOS 7 (Windows95) - ??? */
case 0x73: /* MULTIPLEXED: Win95 OSR2/Win98 FAT32 calls */
case 0xdc: /* CONNECTION SERVICES - GET CONNECTION NUMBER */
case 0xea: /* NOVELL NETWARE - RETURN SHELL VERSION */
INT_Int21Handler( context );
break;
default:
INT_BARF( context, 0x21 );
break;
} /* END OF SWITCH */
/* Set general error condition. */
if (bSetDOSExtendedError)
{
SET_AX( context, GetLastError() );
SET_CFLAG( context );
}
/* Print error code if carry flag is set. */
if (context->EFlags & 0x0001)
TRACE("failed, error %ld\n", GetLastError() );
TRACE( "returning: AX=%04x BX=%04x CX=%04x DX=%04x "
"SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
AX_reg(context), BX_reg(context),
CX_reg(context), DX_reg(context),
SI_reg(context), DI_reg(context),
(WORD)context->SegDs, (WORD)context->SegEs,
context->EFlags );
}
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