I give up. After 3 hours searching the Internet I was not able to find a
single bit of information about the Nintendo 64 interface connectors and
cables... Or I am getting old and dumb, or very few people dedicated
time to open up this information and allow several new devices and
gadgets to be interfaced to the N64 console.  What about a different
joystick? what about something else? PIC units are here to produce
several interface devices, so why not? The question is:  Where is it?