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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* 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.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/*
* This code is based on the original source code of Lord Avalot d'Argent version 1.3.
* Copyright (c) 1994-1995 Mike, Mark and Thomas Thurman.
*/
#define __enhanced_implementation__
/* This is the unit set up by Thomas with help from all the people on
CIS:BPROGA to read the *enhanced* keyboard codes (as opposed to the
readkey-type ones.) */
#include "enhanced.h"
/*#include "Dos.h"*/
/*#include "Crt.h"*/
namespace Avalanche {
boolean isenh() {
byte statefrom16;
registers r;
boolean isenh_result;
isenh_result = false;
{
ah = 0x12;
intr(0x16, r);
statefrom16 = al;
}
if (statefrom16 != shiftstate) return isenh_result;
shiftstate = shiftstate ^ 0x20;
{
ah = 0x12;
intr(0x16, r);
statefrom16 = al;
}
isenh_result = statefrom16 == shiftstate;
shiftstate = shiftstate ^ 0x20;
return isenh_result;
}
void readkeye()
/* function fancystuff:word;
inline( $B4/ $10/ { MOV AH,10 }
$CD/ $16); { INT 16 }
function notfancystuff:word;
inline( $B4/ $00/ { MOV AH,0 }
$CD/ $16); { INT 16 }
*/
{
registers r;
word fs;
if (atbios)
fs = fancystuff; /* We're using an AT */
else fs = notfancystuff; /* ditto, an XT */
inchar = chr(lo(fs));
extd = chr(hi(fs));
}
boolean keypressede()
/*
function fancystuff:boolean;
inline( $B4/ $11/ { MOV AH,11 }
$CD/ $16/ { INT 16 }
$B8/ $00/ $00/ { MOV AX, 0000 }
$74/ $01/ { JZ 0112 (or wherever- the next byte after $40, anyway) }
$40); { INC AX }
*/
{
registers r;
boolean keypressede_result;
if (atbios)
keypressede_result = fancystuff; /* ATs get the fancy stuff */
else keypressede_result = keypressed(); /* XTs get the usual primitive... */
return keypressede_result;
}
class unit_enhanced_initialize {
public:
unit_enhanced_initialize();
};
static unit_enhanced_initialize enhanced_constructor;
unit_enhanced_initialize::unit_enhanced_initialize() {
/* determine bios type */
atbios = isenh();
}
} // End of namespace Avalanche.
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