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- From: jfw@ksr.com (John F. Woods)
- Newsgroups: sci.space
- Subject: Re: What kind of computers are in the shuttle?
- Message-ID: <18741@ksr.com>
- Date: 16 Nov 92 10:31:01 EST
- References: <BxKo4I.F9r.1@cs.cmu.edu> <1992Nov14.020910.15122@access.usask.ca> <1992Nov14.165511.23013@murdoch.acc.Virginia.EDU> <BxqDD5.Arw@zoo.toronto.edu>
- Sender: news@ksr.com
- Lines: 13
-
- henry@zoo.toronto.edu (Henry Spencer) writes:
- >In article <1992Nov14.165511.23013@murdoch.acc.Virginia.EDU> rbw3q@rayleigh.mech.Virginia.EDU (Brad Whitehurst) writes:
- >>... I seem to remember that the
- >>old computer's memory was the old style magnetic "core" memory. Is
- >>that correct? And what kind of memory does the new unit use? That
- >>could explain a lot of the power consumption!
- >The old ones used plated-wire memory, I believe. (This was a relative of
- >magnetic-core memory, one that didn't catch on except in specialized
- >applications.) The new ones use rad-hard SRAM memory.
-
- Rad-hard SRAM, 50 bits of ECC for each 32 bits of memory, *and* a background
- scrub cycle every two seconds. They didn't buy this at "BACK OF THE TRUCK
- PEECEES, LIMITED", nosir!
-