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 (119K) was done by the G104 sense inhibit board (152K) . This board has several green wires from an ECO (engineering change order) to the board (fixes a design error). Back view of board. Core information (157K)
Core information (157K)
Feel free to contact me, David Gesswein firstname.lastname@example.org 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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