>Now that gets me to thinking: Here is  a neat trick to get a =
'push-pull'
>output from two PORT A pins:

>1: define them as analog (ADCON1)
>2: TRIS them as outputs.

>Now, when you BSF either of them the other will automatically be =
cleared.

>This would have been useful in a system I built that drove a piezo
>transducer directly off two PIC pins.

This also sounds like a real crazy scheme to confuse anyone trying to =
reverse engineer your code. It would have them going round in circles =
trying to work out why you are connecting a piezo sounder across analog =
inputs, and be looking for the interrupt routine that is listening into =
them.... but then why is the code doing things to the digital =
outputs?????

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