Hand-wired core for ROM?

Paul Koning paulkoning at comcast.net
Fri Apr 10 11:08:35 CDT 2015

> On Apr 10, 2015, at 12:00 PM, Rod Smallwood <rodsmallwood52 at btinternet.com> wrote:
> Not seamstresses but nimble fingered girls in Puerto Rico and the Phillipines
> Core was in effect ROM. Power the system down switch off and anytime later turn it back on and whatever was
> in core was still there. I can remember our  Field Service guys restarting the final factory diagnositc on new systems.

That’s not ROM, that’s non-volatile RAM.  It used to be that “non-volatile” was assumed and not stated, until semiconductor memory came along that made the adjective necessary.


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