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Article #2777Re: VERY LARGE main memories
From: Scot E. Wilcoxon
Date: Mon, 08 Sep 1986 15:31
Date: Mon, 08 Sep 1986 15:31
21 lines
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>As I think I've mentioned before, it is believed that there are
>approximately 2^200 electrons in the universe. Since it is unlikely that
>anybody would want to reference more things than there are electrons in the
>universe, 200 bits seems like a good upper bound for the length of a memory
>address.
>
>Roy Smith, {allegra,philabs}!phri!roy
Present technologies all require use of many electrons per bit stored.
Therefore the number of electrons in the universe is an actual upper bound.
Particularly since a few electrons are needed for the computer which will use
the memory :-)
Collecting all the electrons in the universe for the factory is left as an
exercise for the reader. Simulating this action and the forces involved will
use more memory than the number of electrons.
--
Scot E. Wilcoxon Minn Ed Comp Corp {quest,dicome,meccts}!mecc!sewilco
45 03 N 93 08 W (612)481-3507 {{caip!meccts},ihnp4,philabs}!mecc!sewilco
"BOOKS" in five-foot neon letters means pictures are sold there.
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!columbia!caip!dayton!meccts!mecc!sewilco From: sewilco@mecc.UUCP (Scot E. Wilcoxon) Newsgroups: net.arch Subject: Re: VERY LARGE main memories Message-ID: <588@mecc.UUCP> Date: Mon, 8-Sep-86 11:31:15 EDT Article-I.D.: mecc.588 Posted: Mon Sep 8 11:31:15 1986 Date-Received: Tue, 9-Sep-86 02:22:23 EDT References: <15505@ucbvax.BERKELEY.EDU> <5100121@ccvaxa> Reply-To: sewilco@mecc.UUCP (Scot E. Wilcoxon) Organization: MN Ed Comp Corp, St Paul, MN Lines: 21 Summary: 200 bits of address space may not be enough, but it's all we have.