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sammyc
Joined: 09 Dec 2005
Posts: 1668
Location: Scottish Borders
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 Posted: Fri Aug 18, 2006 12:04 pm Post subject: IBM 360 MOD 30 - 1 Plane of 16k Block |
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Picked this little diamond up.
It came from an old boy who used to work at IBM when it really was the superpower in computing.
I think i have seen something similar on the site before - I am just real glad to have one for myself.
He had some interesting stories to tell about he way they used to make memory (when testing they used PIANO WIRE).. etc.
feast your eyes - NOT FOR SALE 
_________________
4000+ chips.
4004-P4. |
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Fri Aug 18, 2006 1:27 pm Post subject: |
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Nice find! That's actually a fairly recent core memory plane by IBM standards (1970s). Here are a couple from the preceding decade:
Speaking of piano wire, there were also magnetostrictive delay line memories that circulated bits around a spool of wire in the form of ultrasonic sound waves:
It's amazing what engineers came up with before semiconductor memories were cheap and plentiful.
- CMW |
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Fri Aug 18, 2006 2:25 pm Post subject: |
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Check out this page for a simple guide to core memory.. I didnt realise a read was destructive.. hehe.. read then write. Kinda like double clutching, in a very tenious way 
http://www.psych.usyd.edu.au/pdp-11/core.html
Looks fairly simple to make.. something to add to the bottom of my todo list. |
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