10004Re: [midatlanticretro] All them tubes!
- Oct 7, 2008On Tue, 7 Oct 2008, Stan Brewer wrote:
> How many tubes were in the SAGE? The module in the photo appears to have 8Numbers vary, but generally over 50,000. The large PUs like the one in
> tubes in it, with one missing. (Perhaps 8 bits + parity?) It would take a
> LOT to make say 16K Bytes of storage.
the photo could take up to 9 tubes, while smaller PUs held up to 6.
> Everybody, Back in the good ole days, tube computers, because of theThe SAGE system as a whole had over 99% availability, where at least
> requirement for so many tubes, were down almost as much as they were up.
one of the duplexed systems was operational. Each system was completely
powered off only ONCE a year for annual maintenance.
Mike Loewen mloewen@...
Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/
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