R series PDP-8 board information and R181 DC Carry Chain

Current size small. Select new size for picture Small ( 40K) Medium ( 81K) Large (527K)

This board is designed for building counters with no carry propagate delay. It allows counter of any length to run at 2mc (2MHz).
This board cost $36 in 1968.

Back of board ( 40K)

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Feel free to contact me, David Gesswein djg@pdp8online.com with any questions, comments on the web site, or if you have related equipment, documentation, software etc. you are willing to part with. I am interested in anything PDP-8 related, computers, peripherals used with them, DEC or third party, or documentation.

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