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255 lines
8.1 KiB
C
255 lines
8.1 KiB
C
/*
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* DOS interrupt 21h handler
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*
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* Copyright 1993, 1994 Erik Bos
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* Copyright 1996 Alexandre Julliard
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* Copyright 1997 Andreas Mohr
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* Copyright 1998 Uwe Bonnes
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* Copyright 1998, 1999 Ove Kaaven
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "windef.h"
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#include "winbase.h"
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#include "winternl.h"
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#include "wine/winbase16.h"
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#include "dosexe.h"
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#include "miscemu.h"
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#include "msdos.h"
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#include "file.h"
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#include "wine/unicode.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(int21);
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void WINAPI DOSVM_Int21Handler_Ioctl( CONTEXT86 *context )
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{
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static const WCHAR emmxxxx0W[] = {'E','M','M','X','X','X','X','0',0};
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const DOS_DEVICE *dev = DOSFS_GetDeviceByHandle(
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DosFileHandleToWin32Handle(BX_reg(context)) );
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if (dev && !strcmpiW( dev->name, emmxxxx0W )) {
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EMS_Ioctl_Handler(context);
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return;
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}
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switch (AL_reg(context))
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{
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case 0x0b: /* SET SHARING RETRY COUNT */
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TRACE("IOCTL - SET SHARING RETRY COUNT pause %d retries %d\n",
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CX_reg(context), DX_reg(context));
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if (!CX_reg(context))
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{
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SET_AX( context, 1 );
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SET_CFLAG(context);
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break;
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}
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DOSMEM_LOL()->sharing_retry_delay = CX_reg(context);
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if (!DX_reg(context))
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DOSMEM_LOL()->sharing_retry_count = DX_reg(context);
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RESET_CFLAG(context);
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break;
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default:
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DOS3Call( context );
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}
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}
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/***********************************************************************
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* DOSVM_Int21Handler
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*
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* int 21h real-mode handler. Most calls are passed directly to DOS3Call.
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*/
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void WINAPI DOSVM_Int21Handler( CONTEXT86 *context )
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{
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BYTE ascii;
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RESET_CFLAG(context); /* Not sure if this is a good idea */
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if(AH_reg(context) == 0x0c) /* FLUSH BUFFER AND READ STANDARD INPUT */
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{
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BYTE al = AL_reg(context); /* Input function to execute after flush. */
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/* FIXME: buffers are not flushed */
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/*
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* If AL is not one of 0x01, 0x06, 0x07, 0x08, or 0x0a,
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* the buffer is flushed but no input is attempted.
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*/
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if(al != 0x01 && al != 0x06 && al != 0x07 && al != 0x08 && al != 0x0a)
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return;
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SET_AH( context, al );
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}
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switch(AH_reg(context))
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{
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case 0x00: /* TERMINATE PROGRAM */
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TRACE("TERMINATE PROGRAM\n");
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MZ_Exit( context, FALSE, 0 );
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break;
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case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
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TRACE("DIRECT CHARACTER INPUT WITH ECHO\n");
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DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
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SET_AL( context, ascii );
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DOSVM_PutChar(AL_reg(context));
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break;
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case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
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TRACE("Write Character to Standard Output\n");
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DOSVM_PutChar(DL_reg(context));
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break;
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case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
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/* FIXME: Use DOSDEV_Peek/Read/Write(DOSDEV_Console(),...) !! */
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if (DL_reg(context) == 0xff) {
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static char scan = 0;
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TRACE("Direct Console Input\n");
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if (scan) {
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/* return pending scancode */
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SET_AL( context, scan );
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RESET_ZFLAG(context);
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scan = 0;
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} else {
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if (DOSVM_Int16ReadChar(&ascii,&scan,TRUE)) {
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DOSVM_Int16ReadChar(&ascii,&scan,FALSE);
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/* return ASCII code */
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SET_AL( context, ascii );
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RESET_ZFLAG(context);
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/* return scan code on next call only if ascii==0 */
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if (ascii) scan = 0;
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} else {
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/* nothing pending, clear everything */
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SET_AL( context, 0 );
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SET_ZFLAG(context);
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scan = 0; /* just in case */
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}
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}
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} else {
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TRACE("Direct Console Output\n");
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DOSVM_PutChar(DL_reg(context));
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}
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break;
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case 0x07: /* DIRECT CHARACTER INPUT WITHOUT ECHO */
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/* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
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TRACE("DIRECT CHARACTER INPUT WITHOUT ECHO\n");
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DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
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SET_AL( context, ascii );
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break;
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case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
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/* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
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TRACE("CHARACTER INPUT WITHOUT ECHO\n");
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DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
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SET_AL( context, ascii );
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break;
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case 0x0b: /* GET STDIN STATUS */
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{
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BIOSDATA *data = BIOS_DATA;
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if(data->FirstKbdCharPtr == data->NextKbdCharPtr)
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SET_AL( context, 0 );
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else
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SET_AL( context, 0xff );
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}
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break;
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case 0x25: /* SET INTERRUPT VECTOR */
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DOSVM_SetRMHandler( AL_reg(context),
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(FARPROC16)MAKESEGPTR( context->SegDs, DX_reg(context)));
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break;
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case 0x35: /* GET INTERRUPT VECTOR */
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TRACE("GET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
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{
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FARPROC16 addr = DOSVM_GetRMHandler( AL_reg(context) );
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context->SegEs = SELECTOROF(addr);
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SET_BX( context, OFFSETOF(addr) );
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}
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break;
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case 0x40: /* WRITE TO FILE OR DEVICE */
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/* Writes to stdout are handled here. */
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if (BX_reg(context) == 1) {
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BYTE *ptr = CTX_SEG_OFF_TO_LIN(context,
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context->SegDs,
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context->Edx);
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int i;
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for(i=0; i<CX_reg(context); i++)
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DOSVM_PutChar(ptr[i]);
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} else
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DOS3Call( context );
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break;
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case 0x44: /* IOCTL */
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DOSVM_Int21Handler_Ioctl( context );
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break;
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case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
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TRACE("EXEC %s\n", (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx ));
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if (!MZ_Exec( context, CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx),
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AL_reg(context), CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Ebx) ))
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{
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SET_AX( context, GetLastError() );
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SET_CFLAG(context);
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}
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break;
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case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
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TRACE("EXIT with return code %d\n",AL_reg(context));
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MZ_Exit( context, FALSE, AL_reg(context) );
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break;
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case 0x4d: /* GET RETURN CODE */
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TRACE("GET RETURN CODE (ERRORLEVEL)\n");
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SET_AX( context, DOSVM_retval );
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DOSVM_retval = 0;
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break;
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case 0x50: /* SET CURRENT PROCESS ID (SET PSP ADDRESS) */
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TRACE("SET CURRENT PROCESS ID (SET PSP ADDRESS)\n");
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DOSVM_psp = BX_reg(context);
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break;
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case 0x51: /* GET PSP ADDRESS */
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TRACE("GET CURRENT PROCESS ID (GET PSP ADDRESS)\n");
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/* FIXME: should we return the original DOS PSP upon */
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/* Windows startup ? */
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SET_BX( context, DOSVM_psp );
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break;
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case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
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TRACE("SYSVARS - GET LIST OF LISTS\n");
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{
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context->SegEs = HIWORD(DOS_LOLSeg);
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SET_BX( context, FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB) );
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}
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break;
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case 0x62: /* GET PSP ADDRESS */
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TRACE("GET CURRENT PSP ADDRESS\n");
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/* FIXME: should we return the original DOS PSP upon */
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/* Windows startup ? */
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SET_BX( context, DOSVM_psp );
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break;
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default:
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DOS3Call( context );
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}
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}
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