As I recall, Micromint did a lot of the circuit boards that were associated with articles in BYTE magazine and Ciarcia's Circuit Cellar article.

I have within my museum of computers I've operated over the years, a Micromint SB180 (uses the Hitachi 64180 microprocessor - a Z180 like chip). I was a great CPM like system that ran ZCPR3. Hmmm, I should go dig that up when I get some time.

Maybe this is the same board you are searching for? I should be able to do some digging durin the weekend if its a match. I also have about the first 7 years of BYTE magazine and can scan the article if nothing else... (I hope no one through out my BYTE archives while I wasn't looking.)

Let me know if that's the same board and I'll start digging.

-Jay C. Box