? It certainly didn't have market penetration in USA! I did once have, and implemented in XenoCopy, a sample disk from an Okidata if800 model 20, which seemed to be the same as a BMC if800 model 20 (if one more alternate name might help you find information). I hadn't heard the Sumicom badging. ? I also had a disk for Oki (don't know if same model) with the Microsoft Stand-Alone BASIC, instead of CP/M. ? Unfortunately, the model 20 was a different architecture all together. I have begun looking into Japanese museums. Maybe there is more documentation and data in its country of origin.