>You are using the P-FET as a power switch, turning +5volts ON and OFF? The
>source lead of the FET is tied to +5V and the drain is driving your load?
>The gate of the FET is pulled to +5V by a resistor, and you are connecting
>the
>Gate/resistor point to a PortB pin and trying to turn the FET ON by pulling
>that PortB pin LOW? Correct?

Correct.

>What is the pull-up resistor value? What does the gate voltage drop to when
>you
>set that bit low?

According to my LogicDart, its 0V.  The pup is internal on the part, spec'ed
to be 400K typical

>It is hard to see why the FET wouldn't turn ON even if the gate doesn't get
>all
>the way to 0.0Volts - 3 volts swing on the gate should do the job.
>

Yes...and it does turn on if I drive it from PortD, just PortB doesnt seem
to like it.  I wonder if the internal PUP on the port might be causing
leakage of some sort.  The board is going to be spun anyway, so I will move
the drive over to the other port, just bothers me that it isn't working.

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