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tcgetkey.c
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1993-12-06
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/**
** TCGETKEY.C
**
** Copyright (C) 1992, Csaba Biegl
** 820 Stirrup Dr, Nashville, TN, 37221
** csaba@vuse.vanderbilt.edu
**
** This file is distributed under the terms listed in the document
** "copying.cb", available from the author at the address above.
** A copy of "copying.cb" should accompany this file; if not, a copy
** should be available from where this file was obtained. This file
** may not be distributed without a verbatim copy of "copying.cb".
** You should also have received a copy of the GNU General Public
** License along with this program (it is in the file "copying");
** if not, write to the Free Software Foundation, Inc., 675 Mass Ave,
** Cambridge, MA 02139, USA.
**
** This program 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 General Public License for more details.
**/
#include "grx.h"
#include "mousex.h"
#include <dos.h>
#ifdef USE_AT_BIOS
#define BIOS_CALL_OFFSET 0x1000
#else
#define BIOS_CALL_OFFSET 0
#endif
int getkey(void)
{
_AX = 0 + BIOS_CALL_OFFSET;
geninterrupt(0x16);
#ifdef USE_AT_BIOS
return(((_AL != 0) && (_AL != 0xe0)) ? _AL : _AH + 0x100);
#else
return((_AL != 0) ? _AL : _AH + 0x100);
#endif
}
int getxkey(void)
{
_AX = 0 + BIOS_CALL_OFFSET;
geninterrupt(0x16);
#ifdef USE_AT_BIOS
return((_AL == 0) ? _AH + 0x100 : (_AL == 0xe0) ? _AH + 0x200 : _AL);
#else
return((_AL != 0) ? _AL : _AH + 0x100);
#endif
}
int getkbstat(void)
{
_AX = 0x200 + BIOS_CALL_OFFSET;
geninterrupt(0x16);
return(_AL);
}