Okay, Here is what I'm planning to do for "detection" of a "home docking station" for my Mk2(a) player(s):

Connect serial port Pin3 (TX-data) to Pin1 (CD - Carrier Detect). I will have the Hijack bootup code send data out the serial port, and watch for the CD line to toggle appropriately. The CD input is normally not used by the player serial software, since it is instead used for the infamous "cell phone mute" signal. Strobing a nice known pattern on it ought to prevent any confusion with a Real cell-phone mute from in-car mode.

Comments, suggestions?

Whatever we do here is likely to be copied by multitudes, so correct me now or forever hold your fuses.

Cheers,

-ml