DEC H207 Core Memory Boards
rickb at bensene.com
Fri Jul 10 16:21:55 CDT 2009
I recently came into possession of four DEC H207 Core Memory boards.
They consist of a quad-width board that has a large number of signal
steering diodes, with an attached daughter board that has a 4K x 16
"Planar Memory" array made by Electronic Memories. The boards all have
original DEC warranty seals on them, dated June of 1971.
I'm curious as to what DEC machine may have used these boards, and what
support Flip Chip modules (X & Y drive, Sense/Inhibit, and addressing
logic) may have been used with the core stacks to provide a 4Kx16 memory
Give the 16-bit array size, I assume that it may have been used in a
PDP-11, but I suppose (with four wasted bits) it could have been used in
some form of PDP-8 system.
Any help greatly appreciated.
The Old Calculator Museum
More information about the cctalk