>What I've noticed is this: whether or not the chip runs its program
>seems highly dependent on a "kick start" -- just sitting on the
>bench, it wasn't doing anything -- then suddenly, when the UV
>eraser's lamp switch kicked off, bang -- it started sending RS-232
>chars with nicely-spaced bit times of 416us.

Could you modify the code to run with wdt on ? Set wdt on and sprinkle
clrwdts in the loop (preferrably in one place only).

Is it possible that the MCLR was electrically overstressed in the past ?

Peter

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu