How scarce (valuable) is core for the PDP-8?

From: Hans Franke <Hans.Franke_at_mch20.sbs.de>
Date: Wed Apr 21 17:26:02 1999

> > >Cores large enough for visual indication of magnetic field would be in the
> > >10-20AMPS select curent range. Not a real possibility.

> > How long does core stay magnetized without power?

> Forever, as far as I've been told.

it is said that Fe is the most lasting element in the table,
but I'm not shure if the cores can maintain their orientation
within a black hole ...

> > How many bytes of battery-backed RAM are there in a typical PC?

> 128?

Hmm on several BIOS implementations there are additional RAM areas,
and dont forget the flash parts for setup information.

Gruss
H.

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Received on Wed Apr 21 1999 - 17:26:02 BST

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