Core memory Identification

Paul Koning Paul_Koning at
Wed Mar 18 13:15:11 CDT 2009

>>>>> "Pontus" == Pontus Pihlgren <pontus at Update.UU.SE> writes:

 Pontus> Hello.  A member of the swedish forum called "odd hardware"
 Pontus> on recently got som old memory that he would
 Pontus> like to identify. One is clearly HP, but it would be nice to
 Pontus> know for which machine. The second a Prime memory, and the
 Pontus> third is a _huge_ core memory and without any markings.

 Pontus> Pictures can be found here:


Interesting!  Those core memory photos would be a great addition to
Wikipedia if the photographer is willing to contribute them.  For one
thing, that's actually a coincidence addressed memory, which the
current detail photo isn't.  Excellent photography!

In fact, it looks like a memory with two inhibit wires rather than the
common single inhibit.  This matches what CDC did in the 60-bit
mainframes (6000 series).  But it isn't one of those because it has 7
groups of 8 rows, while CDC has 64 rows and colums per plane.  3584
bits per plane... very strange.


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