nes-emu/cpu/registers/Register.js

A NES emulator

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
/** A CPU register that can handle overflows and underflows. */
class Register {
  constructor(TypedArray) {
    let initialValue = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
    this.bytes = new TypedArray(1);
    this.value = this.initialValue = initialValue;
  }

  /** Resets the `value` to the `initialValue`. */
  reset() {
    this.value = this.initialValue;
  }

  /** Increments the value. */
  increment() {
    this.value++;
  }

  /** Decrements the value. */
  decrement() {
    this.value--;
  }

  /** Returns the actual value. */
  get value() {
    return this.bytes[0];
  }

  /** Sets the actual value. */
  set value(value) {
    this.bytes[0] = value;
  }
  toString() {
    return "[REGISTER]";
  }
}
exports.default = Register;