>(I am told, however, that early space shuttles used core-memory
>computers. I don't know this for a fact, but it's an... intriguing...
>claim.)
Yes... The one which blew up (I can never remember which it was - Challenger
or Endeavour?) and the others of it's time had three core-memory computers,
each running identical software with identical inputs. In the event that one
came up with a different answer than the others it would be automatically
switched off. If the remaining two started to disagree, a fourth machine would
be powered up. This is information gleaned from Richard Feynman's experiences
of investigating the disaster, as recounted in the book 'What do *you* care
what other people think?'.
Regards, Home page: http://www.geocities.com/SiliconValley/Horizon/8786
Ben A L Jemmett ICQ: 9848866 JGSD e-mail: [EMAIL PROTECTED]
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