@Dd289 posted:Got it off. Last questions out of curiosity......
-Would a PS1 board have plugged into the expanded pins where the sound board was or would that require a whole new DCRU that works for PS1?
-I assume this is where the "accepts plugin protosounds" would have gone. What was the pre-PS1 board called?
Requires the PS1 style DCRU. That plain one is missing key voltage regulators- the battery connector required for PS1.
https://ogrforum.ogaugerr.com/...om-board-vs-qsi-dcru
FWIW, just before Christmas, a local customer brought in a collection of MTH engines for inspection and servicing before he was going to turn them over to family. That was the first and only time (started this hobby Dec 2017) ever I saw the pre-PS1 QSI 3 board stack, and because it was still QSI, the instructions for settings is very different than PS1- example resets and so forth.
Again, I can say I have touched a 3 board stack QSI, ran it for a bit, and gave back to the customer (serviced it, new traction tires, lube, and smoke unit re-wick).
Finding those QSI parts- might require someone with a larger parts stash than I have.
