Back in the 1980's, I had worked on the Model III extensively (and the Model I, and Model II...). Moving to CP/M seemed like a good idea, as many of the other systems of the day were running CP/M. In March of 1983, 80 Micro had an article on implementing bank switching - and it seemed like a really good idea. I ended up writing a BIOS for CP/M for the model III using this, and it worked great. Getting another 12K of RAM in was also done... but I can't remember the version that I used at the time (FREEDOM comes to mind, but I can't find any documentation on it). If you used this, and remember the memory modification, I would appreciate a reminder!