Thanks, I'll adjust the values in the source to 10800 nsec so we get better joystick reading.

That is my understanding, so best solution might be to make the device callback the driver to sort out what bezels to interact with, in which case multiple devices instances can be resolved too.

Mike Douglas from http://deramp.com/ is quite the wizard: Without having ever seen the MFA computer, he created a publicly available version of CP/M for the machine. During much of January we exchanged a lot of emails and debugged over the phone, but there is now a monitor ROM and CP/M disk image available at http://deramp.com/downloads/mfa_computer/ which I've also uploaded to the FTP. The availability of the CP/M BIOS should provide enough technical information about the configuration of the EPROM/RAM, serial, parallel and floppy modules.
While this is an "aftermarket" effort, it will allow the official MFA CP/M system to slip right in when it becomes available.