Keronix was a medium sized operation making OEM core stacks and sometimes would take in the whole job and engineer the host board for their product. i know there are Microdata and some other Orange County made minis with Keronix stacks I've seen.? I suspect unless some culprit such as myself who worked at the company saved the data and the like it vanished into the engineering archives of the company and down a rathole.? I don't know of much other for them. Microdata also had Ampex approach the company and make full core boards for instance as well.? The market for core was haphazard at best.? And I don't know of any instance of cooperation to define any standards where documentation would have gone. I hope you find something. BTW I have a couple of 4K Micro 800 boards that I recall were Keronix. thanks jim On 11/20/2020 6:18 PM, Josh Dersch via cctalk wrote: