Core and ICs

[Tony Duell]

> 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.

-tony