This is the G227E X-Y core driver board from the MM8-E 4kx12 core memory option. This board was used to decode the address from the omnibus and drive the correct X any Y lines in the core memory with a controlled current. The reading or writing of the core ( 58k) was done by the G104 sense inhibit board ( 80k) . This board has several green wires from an ECO (engineering change order) to the board (fixes a design error). Back view of board.
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.
