The elusive Space Demon Upright

I finished my clone this past summer as I acquired a nice working boardset and had to put it to good use.

 
I do know the sound board is different, but not by much. I wish the differences were documented because I repro'd Space Firebird's soundboard and wouldn't mind doing space demon's
It does play music. It reminds me of Phoenix, in that it sounds disjointed from the rest of the sounds. (Phoenix of course being a doorbell or something).
 
It does play music. It reminds me of Phoenix, in that it sounds disjointed from the rest of the sounds. (Phoenix of course being a doorbell or something).
It uses a 7910E melody chip. Similar to phoenix.

It is really funny, I recently finally got a space demon pcb set, I do plan on making some schematics for this to see how the set differs so that maybe I can repro it.
 
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