MM11-E and MM1-F core memories
The MM11-E and MM11-F core memories were UNIBUS main memory units; the first UNIBUS memory produced by DEC. They came out with the first PDP-11, the PDP-11/20. They were both 4K word (8K bytes), and had an access time of 500 nsec and a cycle time of 1.2 μsec.
They consisted of a quad H207 core plane board, along with a number of dual and single cards, plugged into a quad system unit. The MM11-F was almost identical to the MM11-E, differing only in one card.
These are the board locations for the MM11-E and F (as seen from the board side) of the backplane:
|Connector||Slot 4||Slot 3||Slot 2||Slot 1|
|v • d • e PDP-11 Computers and Peripherals|
|UNIBUS PDP-11s - PDP-11/20 • PDP-11/15 • PDP-11/35 • PDP-11/40 • PDP-11/45 • PDP-11/50 • PDP-11/55 • PDP-11/70 • PDP-11/05 • PDP-11/10 • PDP-11/34 • PDP-11/04 • PDP-11/44 • PDP-11/60 • PDP-11/24 • PDP-11/84 • PDP-11/94|