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

From: John Foust <jfoust_at_threedee.com>
Date: Wed Apr 21 15:05:38 1999

At 03:51 PM 4/21/99 -0400, allisonp_at_world.std.com wrote:
>
>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?

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

Haven't there been contemporary memory devices that use nano-scale
cores, to eliminate the battery needs and radiation sensitivity of RAM?

- John
Received on Wed Apr 21 1999 - 15:05:38 BST