Sketchy details from memory, so if I said anything that conflicts, assume your version of the facts is more correct than mine. I do think I was confusing/confl

Sketchy details from memory, so if I said anything that conflicts, assume your version of the facts is more correct than mine. I do think I was confusing/conflating AMI MOS with MOS. And do recall that Mostek was a separate company. It doesn't help that MOS chose such a generic name for their company. Didn't they realize this wouldn't be searchable via Google?!? Did they learn nothing from Microsoft naming a language C# and an API .NET?!? It is quite possible I am discussing a different chip. Again, apologies if I lead anyone astray, certainly not my intention. There were many such devices that came through my hands over the years. I wrote firmware in assembler for a bunch of slot machines I would swear blind used a TMS9900 but speaking to friend a few months back he assured me that it was not that CPU at all but one very much like it.