I am using a 16F877 chip, and I am trying to use all of port b as an input.
Right now I am having problems with pin RB6.  The data sheet says it's used
for in-circuit debugging but I have that feature turned off, just like I
have low voltage programming turned off.

If I turn the input voltages for pins 5,6 & 7 off (0V) at the same time, RB6
manages to go down with the others but within 5 seconds RB6 drifts back high
again, and if I switch either RB5 or RB7, the pin input data gathered is
more likely to change than with switching the input at RB6 itself!  I am
using a DIP switch and I have tried it in pull-up and pull-down
configurations with 4.7k resistors.

I am using the uChip Picstart Plus & MPLAB software, it says I have the LVP
and debugging turned off.

Am I overlooking something?  I can't find much in the datasheet.

Thanks

Jeff

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