Cambridge Microprocessor Systems

I had never heard of this supplier until somebody gave me a CMS 6502 board, then a few weeks later I was given a 6809 version of the same board !

A little bit of digging finds that the name was first registered in 1983, the company was only dissolved quite recently in 2021.

I have found a price list for the their 1985 lineup, looks like they were mainly into BBC Tube connected processor cards ?

I have reverse engineered the CPU boards, details can be found here: CMS 6502/6809 CPU Boards