Does anyone have any information on the M-Bus protocol that is used by
Alpine in their car stereo equipment?  I checked the archives and there are
a couple postings from 1997-1998 that also ask about this, but I didn't
find any responses, also nothing on google.  I did find another M-Bus
(Meter-Bus) protocol, though that doesn't seem to be what I need.

What I want to do eventually is fool the stereo into thinking there's a
CD-changer attached so that I can feed in music from my pic-based player
(it won't allow you to access the auxillary input unless it gets some kind
of a response from the cd-changer).

All I know so far is that it is a one-wire type interface.  If I can't find
any more specific information I might try borrowing an oscilloscope from
work and randomly guessing commands.

Thanks,
Mark

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