flipper wrote:
On Mon, 16 Aug 2010 01:10:52 -0500, Dan wrote:

flipper wrote:
On Thu, 12 Aug 2010 12:58:06 -0500, Dan wrote:

ian field wrote:
"Dan" wrote in message
...
ian field wrote:
"flipper" wrote in message
...
On Thu, 12 Aug 2010 00:49:12 -0500, Dan wrote:

I have this core memory brick for which I want to find a good home.
I have no idea what it came out of. I have had it for 40 years and
doubt
I ever knew.

Dan, U.S. Air Force, retired
Oh my, that is an oldie.

The core memory I've got is planar on a PCB.
The one I have/had is/was a PCB a bit more than a foot square with
thousands of tiny ferrite rings suspended by a matrix of wires and a
third wire that zig-zagged through every core.

It either got shoved behind the book shelf in the beddroom or slung out -
I can't remember which.
It should be 4 wires through each core. One each X and Y, and two the
zig zag through them all. One of the latter is sense, the other is write.
Its decades since I set eyes on it.


Can you imagine sitting and wiring those things all day long? I'd
rather glue the hair on tennis balls.

Dan, U.S. Air Force, retired
Aw, come on. Here, give it a try.

http://cgi.ebay.com/VINTAGE-RAW-FERR...efaultDomain_0

45,000 pieces should be plenty to get you started on a respectable 4k
byte memory plane, with 12 thousand or so spares for those fumble
fingered moments.
I may be crazy, but I am not certifiable. I sure would be after
trying that. However, I would be willing to watch with great interest
while you try it.

LOL

Well, you're more patient than I. I might watch a couple strung and
then come back to collect the finished panel... after it's gone
through test and Q.A.

If I could sit through interminable Soviet awareness, AFR 66-1 and
other courses or briefings I can watch someone assemble cores. Some of
those courses were about as stimulating as watching paint dry.

Dan, U.S. Air Force, retired