hdl-js/dist/emulator/hardware/builtin-gates/DRegister.js

Hardware definition language (HDL) and Hardware simulator

/**
 * The MIT License (MIT)
 * Copyright (c) 2017-present Dmitry Soshnikov <dmitry.soshnikov@gmail.com>
 */

'use strict';

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var colors = require('colors');
var Register = require('./Register');

/**
 * 16-bit D (Data) register.
 */

var DRegister = function (_Register) {
  _inherits(DRegister, _Register);

  function DRegister() {
    _classCallCheck(this, DRegister);

    return _possibleConstructorReturn(this, (DRegister.__proto__ || Object.getPrototypeOf(DRegister)).apply(this, arguments));
  }

  return DRegister;
}(Register);

/**
 * Specification of the `DRegister` gate.
 */


DRegister.Spec = {
  name: 'DRegister',

  description: '16-bit D (Data) register.\n\nIf load[t]=1 then out[t+1] = in[t] else out does not change.\n\nClock rising edge updates the value from the input,\nif the `load` is set; otherwise, preserves the state.\n\n  ' + colors.bold('↗') + ' : value = load ? in : value\n\nClock falling edge propagates the value to the output:\n\n  ' + colors.bold('↘') + ' : out = value\n',

  inputPins: [{ name: 'in', size: 16 }, { name: 'load', size: 1 }],
  outputPins: [{ name: 'out', size: 16 }],

  truthTable: Register.Spec.truthTable
};

module.exports = DRegister;