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Thrashbarg
October 18th, 2006, 07:38 PM
Hi,

I was given some core memory last night from a lecturer and I would like to find out more information about it, maybe even get it going. There are no manufacturer logo's at all on it so I'm hoping someone here will be able to recognise it.

(my server will be slow)

http://kaput.homeunix.org/~thrashbarg/core/core2.jpg
http://kaput.homeunix.org/~thrashbarg/core/core3.jpg
http://kaput.homeunix.org/~thrashbarg/core/core4.jpg

If you do happen to recognise it please tell. I'm sure there will be documentation for it on bitsavers.org.
modem7
October 19th, 2006, 03:24 AM
There appears to one going on eBay. Maybe you can ask the seller if they have any more info.

http://cgi.ebay.com.au/handmade-core-memory-stack-from-the-1950s-amazing_W0QQitemZ230038876223QQihZ013QQcategoryZ12 47QQssPageNameZWD2VQQrdZ1QQcmdZViewItem
Thrashbarg
October 19th, 2006, 06:07 AM
specifically i'm looking for the manufacturer and possibly the computer it came out of.

Other photo's on the net seem to suggest it's from a Univac.
Al Kossow
October 19th, 2006, 08:14 AM
The one on eBay is MUCH older (looks to be late 50's)

The one you have is from the 70's judging by the construction of the diode arrays (the red topped things). PC construction puts in in the 70s as well.

Edge connector looks like something HP would have used, but it doesn't look like anything I've seen from them. It doesn't look like an HP part number either. I'm guessing one of the second-tier 70's minicomputer vendors.
gv308
November 5th, 2006, 04:42 AM
Hi
It does not look like a Univac part number (I worked there from 1968 to 1982). How many planes/bits are there?
The one on eBay referred to above (or is it below?) looks like it is from a Univac 1005 or 1050 which puts it in the 1960's.

Gerrit
Leemur
November 28th, 2006, 09:59 PM
This core stack was made by EMM/sesco sometime in the early 70's.
This is a "core stack" a "core memory" would include the drive circuitry.
I know this because I still repair core memories and core stacks and have for over 20years. We probably have the drawings for this stack as we now own EMM/sesco. And yes core memory is still in use today, mostly in millitary aplications. If you have any questions about this please fell free to contact me at tkmurray@npgcable.com