d>Dump registers X to X+Y at I</td></tr>
    <tr><td>FXY4</td> <td>RST X,Y</td> <td>Restore registers X to X+Y from I</td></tr>
  </table>
  <script type="text/javascript">
    class Emulator {
      constructor(output) {
        this.WIDTH = 64;
        this.HEIGHT = 24;
        this.SIZE = this.WIDTH*this.HEIGHT;
        this.output = output;
        this.reset();
      }

      reset() {
        this.memory = new Uint8Array(new ArrayBuffer(0x1000));
        this.pc = 0x000;
        this.i = 0x000;
      