Ohio Scientific 560Z with Intersil IM-6100 Running PDP-8 Code

glitchwrks
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Published on Feb 25, 2017

Sorry for the lousy quality. Shot with an old point-and-shoot handicam.

My Ohio Scientific Challenger 3 running PDP-8 code on an Intersil IM-6100 "PDP-8 on a chip," which is installed on a reproduction OSI 560Z "Processor Lab" board. The IM-6100 is running in an up count loop that stores the accumulator in a lamp register, and the 560Z board is slow-clocking it so that we can see the up count.

The OSI 560Z is a reproduction made from high-resolution scans of an original. It's talking to a homebrew 32KW 12-bit static RAM board, built on an OSI 495 prototype card. The RAM board includes a 12-bit lamp register.

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