This is one I've always been too lazy to figure out, but now I may need to know.

Can someone enumerate all of the serial ports available on the empeg and which ones are duplicates, please? I know about the one on the back of the unit, obviously, I know about the one hanging off the back of the sled. These two are the same thing, are they not? And then isn't there one on the tuner somehow? Is this the same as the port used to deal with the Sony stalk control?

I'm thinking about writing something to attach my empeg to my car's CANbus and want to figure out the best way to get it interfaced.