Can anyone identify this S100 serial board?

ethan at ethan at
Tue Jul 10 20:43:12 CDT 2018

Trying to identify the S100 serial board in my Imsai 8080.

I assume it was a kit. There are wires from behind one of the ICs that go 
to DB25 on the rear, along with other DB25s with a few pins (maybe 
cassette input.)

Any help appreciated.

: Ethan O'Toole

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