66 lines
2.5 KiB
TypeScript
66 lines
2.5 KiB
TypeScript
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// 74xx238 emulation component for the LogicSimulator
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// Copyright (C) 2022 Sascha Nitsch
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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// eslint-disable-next-line @typescript-eslint/no-unused-vars
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function IC74xx238Init() {
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class IC74xx238 extends DILBase {
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private val = 0;
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private enable = false;
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constructor(simulator: Simulator, id: string, param: BaseComponentParam) {
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super(simulator, id, 16, param);
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}
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setup(canvas: SVGElement) {
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super.DILBASEsetup('ic16', canvas, '74xx238');
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}
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update(): boolean {
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if (this.startdelay) {
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--this.startdelay;
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return false;
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}
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if (this.getStateWire('p16') !== WireState.high || this.getStateWire('p8') !== WireState.low) return false; // no power
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// enable = !E1 AND !E2 AND E3
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const enable =
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this.binary(this.getStateWire('p4'), true) === false &&
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this.binary(this.getStateWire('p5'), true) === false &&
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this.binary(this.getStateWire('p6'), true) === true;
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const val =
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this.asint(this.binary(this.getStateWire('p3'), true), 4) +
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this.asint(this.binary(this.getStateWire('p2'), true), 2) +
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this.asint(this.binary(this.getStateWire('p1'), true), 1);
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const mod = this.val !== val || this.enable !== enable;
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this.val = val;
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this.enable = enable;
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this.getPin('p15').setBool(enable && val === 0);
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this.getPin('p14').setBool(enable && val === 1);
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this.getPin('p13').setBool(enable && val === 2);
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this.getPin('p12').setBool(enable && val === 3);
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this.getPin('p11').setBool(enable && val === 4);
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this.getPin('p10').setBool(enable && val === 5);
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this.getPin('p9').setBool(enable && val === 6);
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this.getPin('p7').setBool(enable && val === 7);
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return mod;
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}
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}
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window.IC74xx238 = IC74xx238;
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}
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// eslint-disable-next-line @typescript-eslint/no-unused-vars
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function IC74xx238Depends() {
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return 'dilbase';
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}
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