Simmons SDS7 Analog Synthesizer & Drum Machine (CEM3372 CEM3340 ROM x 8 Cards)

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via this auction

Pics of the inside below.



"Simmons SDS7 with eight cards (!)

- Each of the eight cards has a CEM3372. a CEM3340, and an original ROM

- Cards include: Bass, Tom, Tom, Tom, Snare, Hi Hat, Cymbal, Cymbal.

Sold as-is. The unit powers up and the brain looks to be clean but I can't get the machine to do much more. I am completely ignorant of the OS, which is a bit archaic, so that's not helping. Also, the unit is missing a few of the plastic hats/indicators that sit on the very top of the knob. The original plastic knobs are still there and the pots seem to work fine."