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### <a name="Hardware Link between Launch Com"></a> Hardware Link between Launch Computer and VCR

The launch computer turns on the ATV VCR by toggling bits on the parallel port which then triggers optoisolators to "push" the buttons on a standard programmable remote control. We'll need +5V from somewhere - we can get it from the PS2 keyboard or mouse port, or from a USB to parallel port converter.

Here's a diagram:

<center>
  <table border=1 cellpadding=0 cellspacing=0>
    <tr>
      <td>[[lc_2_vcr_link.jpg]]</td>
    </tr>
  </table>
</center>