/****************************************************************************
*
*                            Open Watcom Project
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*    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
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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****************************************************************************/


//
// REALVEC      : real-mode vector handling for Phar Lap
//

#include <dos.h>

extern unsigned long _getrealvect(char);
#pragma aux _getrealvect = \
                "mov    ax,2503h" \
                "int    21h" \
                parm [cl] \
                value [ebx] \
                modify exact [ax ebx]

extern void _setrealvect(char,unsigned long);
#pragma aux _setrealvect = \
                "mov    ax,2505h" \
                "int    21h" \
                parm [cl] [ebx] \
                modify exact [ax]

extern void _setvectp(unsigned short,void (interrupt far *)());
#pragma aux _setvectp = \
                "push   ds" \
                "mov    ds,cx" \
                "mov    cl,al" \
                "mov    ax,2506h" \
                "int    21h" \
                "pop    ds" \
                parm [al] [cx edx] \
                modify exact [ax cl]


unsigned long   _dos_getrealvect( int intnum ) {
//==============================================

    return( _getrealvect( intnum ) );
}


void    _dos_setrealvect( int intnum, unsigned long func ) {
//==========================================================

    _setrealvect( intnum, func );
}


void    _dos_setvectp( int intnum, void (interrupt far *func)() ) {
//=================================================================

    _setvectp( intnum, func );
}
