After much searching through the forums / internet / etc., I couldn't find what I was looking for.

Basically, just for kicks, I want to build things that use the tuner port on the EMpeg - various random devices that perhaps emulate a tuner. The only information that I could deduce from what I found on the web was that there is some serial communication between the empeg and the tuner module, and some of the radio stuff (RDS, for example) happens in the DSP. I'm not interested in any of that at this point, but a good starting place would be some sort of command documentation (code works for me) on what data is exchanged between the tuner module and the empeg, and a simple pin-out for the tuner interface (what's going over the wires).

Any help is appreciated; hopefully I can make some cool stuff for my 10-year-old toy smile