Sweden-Number/dlls/winedos/int21.c

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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 "ntddk.h"
#include "wine/winbase16.h"
#include "dosexe.h"
#include "miscemu.h"
#include "msdos.h"
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#include "file.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(int21);
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void WINAPI DOSVM_Int21Handler_Ioctl( CONTEXT86 *context )
{
const DOS_DEVICE *dev = DOSFS_GetDeviceByHandle(
DosFileHandleToWin32Handle(BX_reg(context)) );
if (dev && !strcasecmp( dev->name, "EMMXXXX0" )) {
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))
{
AX_reg(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:
DOS3Call( context );
}
}
/***********************************************************************
* DOSVM_Int21Handler
*
* int 21h real-mode handler. Most calls are passed directly to DOS3Call.
*/
void WINAPI DOSVM_Int21Handler( CONTEXT86 *context )
{
RESET_CFLAG(context); /* Not sure if this is a good idea */
if(AH_reg(context) == 0x0c) /* FLUSH BUFFER AND READ STANDARD INPUT */
{
BYTE al = AL_reg(context); /* Input function to execute after flush. */
/* FIXME: buffers are not flushed */
/*
* If AL is not one of 0x01, 0x06, 0x07, 0x08, or 0x0a,
* the buffer is flushed but no input is attempted.
*/
if(al != 0x01 && al != 0x06 && al != 0x07 && al != 0x08 && al != 0x0a)
return;
AH_reg(context) = al;
}
switch(AH_reg(context))
{
case 0x00: /* TERMINATE PROGRAM */
TRACE("TERMINATE PROGRAM\n");
MZ_Exit( context, FALSE, 0 );
break;
case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
TRACE("DIRECT CHARACTER INPUT WITH ECHO\n");
DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
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 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 */
AL_reg(context) = scan;
RESET_ZFLAG(context);
scan = 0;
} else {
char ascii;
if (DOSVM_Int16ReadChar(&ascii,&scan,TRUE)) {
DOSVM_Int16ReadChar(&ascii,&scan,FALSE);
/* return ASCII code */
AL_reg(context) = ascii;
RESET_ZFLAG(context);
/* return scan code on next call only if ascii==0 */
if (ascii) scan = 0;
} else {
/* nothing pending, clear everything */
AL_reg(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 */
/* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
TRACE("DIRECT CHARACTER INPUT WITHOUT ECHO\n");
DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
break;
case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
/* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
TRACE("CHARACTER INPUT WITHOUT ECHO\n");
DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
break;
case 0x0b: /* GET STDIN STATUS */
{
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BIOSDATA *data = DOSMEM_BiosData();
if(data->FirstKbdCharPtr == data->NextKbdCharPtr)
AL_reg(context) = 0;
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else
AL_reg(context) = 0xff;
}
break;
case 0x25: /* SET INTERRUPT VECTOR */
DOSVM_SetRMHandler( AL_reg(context),
(FARPROC16)MAKESEGPTR( context->SegDs, DX_reg(context)));
break;
case 0x35: /* GET INTERRUPT VECTOR */
TRACE("GET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
{
FARPROC16 addr = DOSVM_GetRMHandler( AL_reg(context) );
context->SegEs = SELECTOROF(addr);
BX_reg(context) = OFFSETOF(addr);
}
break;
case 0x40: /* WRITE TO FILE OR DEVICE */
/* Writes to stdout are handled here. */
if (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
DOS3Call( context );
break;
case 0x44: /* IOCTL */
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DOSVM_Int21Handler_Ioctl( context );
break;
case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
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) ))
{
AX_reg(context) = GetLastError();
SET_CFLAG(context);
}
break;
case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
TRACE("EXIT with return code %d\n",AL_reg(context));
MZ_Exit( context, FALSE, AL_reg(context) );
break;
case 0x4d: /* GET RETURN CODE */
TRACE("GET RETURN CODE (ERRORLEVEL)\n");
AX_reg(context) = DOSVM_retval;
DOSVM_retval = 0;
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 */
TRACE("GET CURRENT PROCESS ID (GET PSP ADDRESS)\n");
/* FIXME: should we return the original DOS PSP upon */
/* Windows startup ? */
BX_reg(context) = DOSVM_psp;
break;
case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
TRACE("SYSVARS - GET LIST OF LISTS\n");
{
context->SegEs = HIWORD(DOS_LOLSeg);
BX_reg(context) = FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB);
}
break;
case 0x62: /* GET PSP ADDRESS */
TRACE("GET CURRENT PSP ADDRESS\n");
/* FIXME: should we return the original DOS PSP upon */
/* Windows startup ? */
BX_reg(context) = DOSVM_psp;
break;
default:
DOS3Call( context );
}
}