There is an RS-232 (I assume) serial port on the MicroVision FX. However, the manual has no information as to what it might be used for. Does anyone have documentation of what this does? Is it an output for a serial printer? Is it a serial remote control input? A factory diagnostic port? I have a client who would like to remotely control this board. Is it possible through the serial port? (They don't have the 25-pin remote go interface)
After some fun research that included talking to several people who have been at ETC over 20 years each: The answer is that we never used that RS-232 serial port for anything at all.
No one can remember but the most popular guess is that it got added for use at some future date.