66 lines
2.5 KiB
TypeScript
66 lines
2.5 KiB
TypeScript
// 74xx238 emulation component for the LogicSimulator
|
|
// Copyright (C) 2022 Sascha Nitsch
|
|
|
|
// 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 3 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, see <https://www.gnu.org/licenses/>.
|
|
|
|
// eslint-disable-next-line @typescript-eslint/no-unused-vars
|
|
function IC74xx238Init() {
|
|
class IC74xx238 extends DILBase {
|
|
private val = 0;
|
|
private enable = false;
|
|
constructor(simulator: Simulator, id: string, param: BaseComponentParam) {
|
|
super(simulator, id, 16, param);
|
|
}
|
|
|
|
setup(canvas: SVGElement) {
|
|
super.DILBASEsetup('ic16', canvas, '74xx238');
|
|
}
|
|
|
|
update(): boolean {
|
|
if (this.startdelay) {
|
|
--this.startdelay;
|
|
return false;
|
|
}
|
|
if (this.getStateWire('p16') !== WireState.high || this.getStateWire('p8') !== WireState.low) return false; // no power
|
|
// enable = !E1 AND !E2 AND E3
|
|
const enable =
|
|
this.binary(this.getStateWire('p4'), true) === false &&
|
|
this.binary(this.getStateWire('p5'), true) === false &&
|
|
this.binary(this.getStateWire('p6'), true) === true;
|
|
const val =
|
|
this.asint(this.binary(this.getStateWire('p3'), true), 4) +
|
|
this.asint(this.binary(this.getStateWire('p2'), true), 2) +
|
|
this.asint(this.binary(this.getStateWire('p1'), true), 1);
|
|
const mod = this.val !== val || this.enable !== enable;
|
|
this.val = val;
|
|
this.enable = enable;
|
|
this.getPin('p15').setBool(enable && val === 0);
|
|
this.getPin('p14').setBool(enable && val === 1);
|
|
this.getPin('p13').setBool(enable && val === 2);
|
|
this.getPin('p12').setBool(enable && val === 3);
|
|
this.getPin('p11').setBool(enable && val === 4);
|
|
this.getPin('p10').setBool(enable && val === 5);
|
|
this.getPin('p9').setBool(enable && val === 6);
|
|
this.getPin('p7').setBool(enable && val === 7);
|
|
return mod;
|
|
}
|
|
}
|
|
window.IC74xx238 = IC74xx238;
|
|
}
|
|
|
|
// eslint-disable-next-line @typescript-eslint/no-unused-vars
|
|
function IC74xx238Depends() {
|
|
return 'dilbase';
|
|
}
|