Craig Lee wrote:

> Does the I/O change work well, or is it tricky like the 'F84?

  If you just use the proper pin (RB0 on the 16F84) it should work fine.

  I'd guess that polling should be pretty practical to within about ten
cycles, if that accuracy suffices.  It may do, using the "Scenix"
approach (use a real fast clock).  But I don't quite understand your
application, so I'm not sticking my nose out.
--
  Cheers,
        Paul B.