apple2js/js/cards/parallel.js
2020-11-25 17:28:37 -08:00

45 lines
1.2 KiB
JavaScript

/* Copyright 2010-2019 Will Scullin <scullin@scullinsteel.com>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
import { debug } from '../util';
import { rom } from '../roms/cards/parallel';
export default function Parallel(io, cbs) {
debug('Parallel card');
var LOC = {
IOREG: 0x80
};
function _access(off, val) {
switch (off & 0x8f) {
case LOC.IOREG:
if (cbs.putChar && val) {
cbs.putChar(val);
}
break;
default:
debug('Parallel card unknown softswitch', off);
}
}
return {
ioSwitch: function (off, val) {
return _access(off, val);
},
read: function(page, off) {
return rom[off];
},
write: function() {}
};
}