Piggy Deux & Reset Cable

PIGGY DEUX (Gottlieb System 80, 80A, or 80B Piggyback Alternative) & Reset Cable

Manufacturer: Pinitech

This is an alternative piggyback board for Gottlieb System 80 machines and is meant as a plug-and-play fix on System 80 MPUs that have either daughterboard or U2/U3 issues that are causing the machine to lock-up or reset intermittently (or in some cases, stop working altogether unless you press on the daughterboard on System 80B games).

As many people are aware, the Gottlieb System 80B boards used a piggyback / daughter board that was soldered directly to the MPU. Over time, the solder joints fail and this causes the machine to freeze up, reset during use (due to vibration and/or expansion/contraction of cold solder joints) or the game may not even start up at all. Many times those issues are entirely the fault of the piggyback board and it's solder connections.

The PIGGY DEUX is a no-fuss, plug-and-play way to solve daughterboard issues. Instead of attempting to repair the original daughterboard, you can leave that in place. Instead, the PIGGY DEUX plugs into the TC1 socket at the top of a System 80/A/B MPU. No board modifications. No damage to your MPU. All you have to do is use one of our Combo 80 or 80A EPROMS (disable the U2/U3 by shorting a Resistor R42 to ground (or clipping U2 & U3 right out), or take the 2764 EPROM from the original daughterboard, insert it into the PIGGY DEUX, then plug the PIGGY DEUX into the MPU board. That's all there is to it.

If you'd like to keep the reset board in-circuit there is also a header on the PIGGY DEUX to make the connections for that and we sell the wire harness to easily make the connection between the PIGGY DEUX and reset board.

USE AS A DIAGNOSTIC TOOL
The PIGGY DEUX is also useful as a diagnostic tool in that it can help to rule-out the original daughterboard from being the issue. Great to carry in a toolbox since it's small/portable and since it's plug-and-play (just remove the EPROM from the original daughterboard(or use a shorting jumper to disable U2/U3) and plug into the PIGGY DEUX) you can quickly find out if cracked solder joints on the MPU were causing intermittent issues or a non-working game.