Alan B. Pearce wrote:

>> But BTFSS/BTFSC never *store* anything back, do they ?
> 
> Umm, yes, that is why a bit operation on a Port register can have weird side 
> effects on other bits. The whole byte is read, the bit checked, and then the 
> whole byte is written back.

It does ?
Right, in that case, R-M-W problems are the same with
these instructions...

Jan-Erik.

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