[SML] turning off light boards

[Lou Poppler]

----- Alf Sauve' via Stagecraft <stagecraft at theatrical.net> wrote:
> Never heard of "volatile" core memory.   One of the advantages, possible 
> the only one, of 'core" memory was that it was not volatile.  It 
> actually was a real pain if you were trying to scrub it clean of 
> classified data.     Been there. done that.

ISTR that the old ferrite cores would be demagnetized by a read operation,
and always had to be "refreshed" after a read, IE every time you read, you 
have to write the info back to that memory, unless you are exchanging it with
new, different data in the write-back.  It is true that they would remember
their state for a long time if you left them alone, even with the computer
powered off.

-- 
The sand remembers
once there was beach and sunshine
but chip is warm too
-- Damon Koronakos and Brian Roberts:
    HI-TECH HAIKUS