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Re: Re: Summary A

To Steve,

>Core memory is still used in a few applications, although sometimes just
>for historical reasons.  It does have the advantage of being
>radiation-hard (find me a cosmic ray big enough to wipe out a 1 mm
>ferrite core) and non-volatile.

I never understood exactly how it works, I know there are horizontal and
vertical lines, with some small ring around every "knot". Do you know how it
works and can you explain it in a paragraph?
(What is the funcion of these ferrite rings?)

> > >The guys who programed them HATED them!
> > 
> > yeah, 256 kb is not too much.
> > 
> > But are todays Shuttles still having the same amount of memory?
>Do you know what it takes to certify a computer system for use as a
>control device in a man-rated aircraft, especially the software?
>Generally you only do it once.  That's why the shuttle computers and
>software are still unchanged from the time they were designed.
>Supposedly they're working on a new computer design, but you won't see
>it for a while.