Hello all,

I was wondering if anyone out there knows anything about the touch screens
used in 3COM Palm IIIx's. I recently recieved a Palm IIIx thats LCD was
smashed, so I had the idea of trying to interface the touch screen panel to
a PIC. The panel consists of a thin clear plastic sheet with conductive
strips on the right and left sides. The Palm connected to these 3 strips in
6 places: top, middle, and bottom of both side strips. The 6 points came
together at a 4-pin connector. It was difficult tracing the connections
from the 4-pin connector due to the fact that the glass was smashed
something fierce, but I beleave the pinout is as follows:

Pin1: Left side middle
Pin2: Both sides top
Pin3: Right side middle
Pin4: Both sides bottom

I beleave the touch screen is of a resistive type, because i think
capasitive types require human touch, which rules out the
little pen dealie that the Palm uses. Anyway, if anyone can give me any
information on how to use this thing please let me know!

Thanks,
Tim Thompson

P.S. Info on the EL backlight would be apreciated too, such as power
requirements, etc.



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