97 lines
3.7 KiB
TypeScript
97 lines
3.7 KiB
TypeScript
// Address Register component for the LogicSimulator used on the 8-bit-computer
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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 AddrRegister extends BaseComponent {
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private r = 0;
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private R = false;
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private W = false;
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private CLK = false;
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private oldCLK = false;
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constructor(simulator: Simulator, id: string, param: BaseComponentParam) {
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super(simulator, id, param);
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for (let i = 0; i < 8; ++i) {
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this.pins.set('A' + (7 - i), new TriState(this, -40, i * 10 - 80));
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this.pins.set('B' + (7 - i), new TriState(this, -40, i * 10 + 10));
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this.stateMapBool.set('A' + (7 - i), false);
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this.stateMapBool.set('B' + (7 - i), false);
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}
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this.pins.set('R', new TriState(this, 40, 100));
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this.pins.set('W', new TriState(this, 40, 110));
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this.pins.set('CLK', new TriState(this, 40, 80));
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this.pins.set('invCLK', new TriState(this, 40, 90));
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for (let i = 0; i < 16; ++i) {
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this.pins.set('O' + (15 - i), new TriState(this, 40, i * 10 - 80));
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this.stateMapBool.set('O' + (15 - i), false);
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}
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}
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setup(canvas: SVGElement) {
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super.doSetup('addrregister', canvas);
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}
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update(): boolean {
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let i;
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let value;
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// is R set ? then send out to addrbus
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if (this.R) {
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// which register is selected via R3...R0
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value = this.r;
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for (i = 0; i < 16; ++i) {
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this.getPin('O' + i).setBool((value & (1 << i)) > 0 ? true : false);
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}
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}
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const rising = this.CLK && this.oldCLK === false;
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this.oldCLK = this.CLK;
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// is W set ? read from bus on raising clock edge
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if (this.W && rising) {
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this.r =
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this.asint(this.getStateBool('A7'), 32768) +
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this.asint(this.getStateBool('A6'), 16384) +
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this.asint(this.getStateBool('A5'), 8192) +
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this.asint(this.getStateBool('A4'), 4096) +
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this.asint(this.getStateBool('A3'), 2048) +
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this.asint(this.getStateBool('A2'), 1024) +
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this.asint(this.getStateBool('A1'), 512) +
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this.asint(this.getStateBool('A0'), 256) +
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this.asint(this.getStateBool('B7'), 128) +
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this.asint(this.getStateBool('B6'), 64) +
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this.asint(this.getStateBool('B5'), 32) +
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this.asint(this.getStateBool('B4'), 16) +
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this.asint(this.getStateBool('B3'), 8) +
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this.asint(this.getStateBool('B2'), 4) +
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this.asint(this.getStateBool('B1'), 2) +
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this.asint(this.getStateBool('B0'), 1);
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}
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return false;
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}
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io() {
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this.CLK = this.binary(this.getPin('CLK').getAndReset(), true);
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this.getPin('invCLK').getAndReset();
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this.R = this.binary(this.getPin('R').getAndReset(), true);
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this.W = this.binary(this.getPin('W').getAndReset(), true);
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for (let i = 0; i < 8; ++i) {
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this.stateMapBool.set('A' + i, this.binary(this.getPin('A' + i).getAndReset(), true));
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this.stateMapBool.set('B' + i, this.binary(this.getPin('B' + i).getAndReset(), true));
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}
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for (let i = 0; i < 16; ++i) {
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this.stateMapBool.set('O' + i, this.binary(this.getPin('O' + i).getAndReset(), true));
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}
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}
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}
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