118 lines
4.4 KiB
TypeScript
118 lines
4.4 KiB
TypeScript
// Logic simulation for the 74xx273 IC 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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class Logic74xx273 extends BaseComponent {
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private clock = false;
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private internalstate: boolean[];
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private d0 = true;
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private d1 = true;
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private d2 = true;
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private d3 = true;
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private d4 = true;
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private d5 = true;
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private d6 = true;
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private d7 = true;
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private cp = true;
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private mr = true;
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constructor(simulator: Simulator, id: string, param: BaseComponentParam) {
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super(simulator, id, param);
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this.pins.set('d0', new TriState(this, -40, -75));
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this.pins.set('d1', new TriState(this, -40, -60));
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this.pins.set('d2', new TriState(this, -40, -45));
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this.pins.set('d3', new TriState(this, -40, -30));
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this.pins.set('d4', new TriState(this, -40, -15));
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this.pins.set('d5', new TriState(this, -40, 0));
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this.pins.set('d6', new TriState(this, -40, 15));
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this.pins.set('d7', new TriState(this, -40, 30));
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this.pins.set('cp', new TriState(this, -40, 60));
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this.pins.set('mr', new TriState(this, -40, 75));
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this.pins.set('q0', new TriState(this, 40, -75));
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this.pins.set('q1', new TriState(this, 40, -60));
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this.pins.set('q2', new TriState(this, 40, -45));
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this.pins.set('q3', new TriState(this, 40, -30));
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this.pins.set('q4', new TriState(this, 40, -15));
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this.pins.set('q5', new TriState(this, 40, 0));
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this.pins.set('q6', new TriState(this, 40, 15));
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this.pins.set('q7', new TriState(this, 40, 30));
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this.internalstate = [];
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for (let i = 0; i < 8; ++i) {
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this.internalstate[i] = false;
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}
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}
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setup(canvas: SVGElement) {
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super.doSetup('logic74xx273', canvas);
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}
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io() {
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this.d0 = this.binary(this.getPin('d0').getAndReset(), true);
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this.d1 = this.binary(this.getPin('d1').getAndReset(), true);
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this.d2 = this.binary(this.getPin('d2').getAndReset(), true);
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this.d3 = this.binary(this.getPin('d3').getAndReset(), true);
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this.d4 = this.binary(this.getPin('d4').getAndReset(), true);
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this.d5 = this.binary(this.getPin('d5').getAndReset(), true);
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this.d6 = this.binary(this.getPin('d6').getAndReset(), true);
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this.d7 = this.binary(this.getPin('d7').getAndReset(), true);
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this.cp = this.binary(this.getPin('cp').getAndReset(), true);
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this.mr = this.binary(this.getPin('mr').getAndReset(), true);
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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.mr === false) {
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// reset
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for (let i = 0; i < 8; ++i) {
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this.internalstate[i] = false;
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}
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}
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let mod = false;
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if (this.cp && this.clock === false) {
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mod ||= this.internalstate[0] !== this.d0;
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this.internalstate[0] = this.d0;
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mod ||= this.internalstate[1] !== this.d1;
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this.internalstate[1] = this.d1;
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mod ||= this.internalstate[2] !== this.d2;
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this.internalstate[2] = this.d2;
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mod ||= this.internalstate[3] !== this.d3;
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this.internalstate[3] = this.d3;
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mod ||= this.internalstate[4] !== this.d4;
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this.internalstate[4] = this.d4;
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mod ||= this.internalstate[5] !== this.d5;
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this.internalstate[5] = this.d5;
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mod ||= this.internalstate[6] !== this.d6;
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this.internalstate[6] = this.d6;
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mod ||= this.internalstate[7] !== this.d7;
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this.internalstate[7] = this.d7;
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}
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this.getPin('q0').setBool(this.internalstate[0]);
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this.getPin('q1').setBool(this.internalstate[1]);
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this.getPin('q2').setBool(this.internalstate[2]);
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this.getPin('q3').setBool(this.internalstate[3]);
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this.getPin('q4').setBool(this.internalstate[4]);
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this.getPin('q5').setBool(this.internalstate[5]);
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this.getPin('q6').setBool(this.internalstate[6]);
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this.getPin('q7').setBool(this.internalstate[7]);
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this.clock = this.cp;
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return mod;
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}
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}
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