Vis Naicker wrote...

[backwards-chip story snipped; at least he didn't insert the chip
leads into his finger and draw blood, like I once did...]

>How do I know if there was no internal damage ? The device
>is a 16F84-4. Anyone got code and hookup that will ascertain
>that all is well? Every port and timer ? Every programming
>location and ram and other oscillator setup? You know , put
>it through the paces . Anyone did something like this ? And
>for testing other devices ?

Unless this poor, hapless little 'F84 is a truly cherished
possession that will see future use on a project of enormous
importance, I wouldn't bother; although anything is possible,
you've already verified that most of it works.

If it were me, I'd write a program to wiggle each of the I/O
pins, one at a time, and run the program while looking at the
pins on a scope or logic probe (or just an LED and series
resistor) to make sure the pin output circuitry is still working.

My opinion is that if the pin I/O is ok, the likelihood that
there's anything damaged internally is rather low.

DD

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