What is the best way to read a POT without using an A/D converter?  I need
to generate values between 0 and 128 from the reading.  It also needs to be
repeatable i.e. when the POT is not moved, the same number is generated.
The time limit for reading is not too critical, maybe 250 msec or less.
Idealy it should not need "calibration" so that multiple units would behave
the same.

What I am currently doing is the method shown at:
http://www.geocities.com/SiliconValley/2499/answers.html#PIC00065
and measuring the charge time.  The times seem to vary quite a bit when the
pot is in the same position.

Is there a better way to get more stable readings?

BTW I am using a 16C84 for the project.  If I can't get it to work right,
I'll switch to the 16C71 and use the A/D converter.

Thanks for any help

Norm