24 Dec
2005
24 Dec
'05
1:15 a.m.
On Sat, 24 Dec 2005 00:06:02 +0000 (GMT)
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Core is also more 'radiation hardened' for certain applications.
For space or military use, for instance. Not as important now
but it was for a long while.
By the way to
answer someone's question, all of my equipment is =
transistor &
diode logic. It predates ICs by several years. Core memory started =
with
vacuum tubes (or valves, if you prefer), moved to transistors and =
finally
ICs at the end of the era. I saw only a few commercial core memories =
with
ICs. ICs meant RAM was feasible, so there was a very narrow window of =
Core
and ICs. Many of those moved over to RAM in the middle of the =
I have more machines with core + ICs that core + discretes only....
Core + discrrete transsitors/diodes :
HP9100B
Casio AL1000
Core + ICs (mostly TTL)
Philips P850
DEC PDP8/e
DEC PDP11/10
Other DEC Unibus Core memory planes + drivers
Casio AL2000
DG Noav 1200
HP2100A
Remmber core was non-volatile which gave it an advantage over
semiconductor RAM in some applications.