R series PDP-8 board information and picture r202.jpg

R series PDP-8 board information and Picture R202 Dual Flip Flop

Current size small. Select new size for picture Small ( 32K) Medium ( 62K) Large (209K)

This board is a dual flip flop where each flip flop stores 1 bit of information. This is somewhat similar to the TTL 7473 dual J-K flip flop. It has a set and reset input and a gated set and reset. Without additional gating you can perform the following operations.

Up counter with load
Shift register with parallel load
Ring counter
Down counter
BCD counter

This board cost $22 in 1968.

Schematic of board as a scanned PDF file.

Back of board ( 32K)

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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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