/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include "variety.h"
#include <stddef.h>
#include <dos.h>
#if defined(__386__)
 #if defined(__WINDOWS_386__)
  #include "tinyio.h"
 #else
  #include "extender.h"
  extern  void (interrupt _WCFAR *_getvect())();
  #pragma aux  _getvect = \
                        0x06            /* push es*/\
                        0xcd 0x21       /* int 21h    */\
                        0x8c 0xc2       /* mov dx,es  */\
                        0x07            /* pop es     */\
                        parm [ax] [cl] value [dx ebx];
 #endif
#else
 extern  void (interrupt _WCFAR *_getvect())();
 #pragma aux  _getvect = 0xb4 0x35       /* mov ah,35h */\
                         0xcd 0x21       /* int 21h    */\
                         parm [ax] value [es bx];
#endif

_WCRTLINK void (interrupt _WCFAR *_dos_getvect(int intnum))()
    {
#if defined(__386__)
 #if defined(__WINDOWS_386__)
        return( TinyGetVect(intnum) );
 #else
        if( _IsPharLap() ) {
            return( _getvect( 0x2502, intnum ) );
        } else {        /* OS386 or DOS4G */
            return( _getvect( 0x3500 | (intnum & 0xff), 0 ) );
        }
 #endif
#else
        return( _getvect(intnum) );
#endif
    }
