if you have an i2c io card for the PC (check Elektor magazine for that,
or any good electronics resources), you could build a logger program,
plug the pc onto the cable and press each button in sequence, then do
the same with the changer, replaying the sequences from the keyboard to
read te responses... basic reverse engineering...

sincerely
Amaury

On 19 Aug 2001 06:38:46 +0100, Joe Denehan wrote:
> This may be a bit ambitious but I was thinking of installing an old 75Mhz
> Pentium in my car boot/trunk to use as an MP3 player. I have a Kenwood car
> stereo and 10-disc changer and would like to keep the head unit to control
> the PC-MP3 player. Basic functions like skip to next song, play, and maybe
> even CD-Text for the song title/artist. I have the pinouts for the 10-disc
> changer socket and was wondering if anyone out there could get me started in
> the right direction, any help at all would be gratefull accepted.
>
> Regards,
>                 Joe Denehan
>
>
>    Pinouts
>   /--------\
>  /   9 5 1  \
> |13 10 6 2 ##
> |   11 7 3 ## Notch
>  \  12 8 4  /
>   ----------
>
> 1.  Changer On (+4V) - Out
> 2.  +12V - Out
> 3.  Ground
> 4.  Reset changer - Out
> 5.  Left channel input - In
> 6.  Unknown
> 7.  Audio Ground
> 8.  Mute sound - In
> 9.  Right channel input - In
> 10. I2C output data to CD changer - Out
> 11. I2C input data from CD-changer - In
> 12. Changer present - send on this pin +4V - In
> 13. Clock data synchronize
>
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