Fabri-tek was a common supplier for core memory. Many companies used their memories. Fabri-tek Instruments became Nicolet Instruments in 1971.
I'm not sure one could tell what machine it was used for. It was a common memory system. They did make a lot of memories for military use. Dwight ________________________________ From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Bob Smith via cctalk <cctalk@classiccmp.org> Sent: Saturday, May 5, 2018 12:36:07 PM To: Chuck Guzis; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Old core memory system. SDS built a 24 bit system with Parity too, the CDC 924 was 24bit, there were a few others and I believe but can not recall for sure, a navy 24 bit maybe done by ERA. bb On Sat, May 5, 2018 at 2:32 PM, Chuck Guzis via cctalk <cctalk@classiccmp.org> wrote: > On 05/05/2018 10:23 AM, Pete Lancashire via cctalk wrote: >> Core temp was a big issue even in commercial environments. You didn't see >> it temp but you would see core [driver] current. > > The early IBM 7000 series (7070, 7080, 7090) kept core in a > temperature-regulated oil bath. Later versions used pre-heated air > (e.g. 7094 core). > > On the CDC 7600, hitting the same area of care repeatedly could cause it > to overheat and throw parity errors. Circuitry to detect this would > slow-down repeated accesses. > > That was for CM. I seem to recall someone telling me that there was no > such provision in PP core and a "jump to self" was sufficient to throw > an error--but that may be a shaggy-dog story. > > --Chuck
