I've seen several postings that say that read-modify-write instructions on IO
ports is a bad idea.

Is this only the case when the TRIS bits are a mixture of inputs and outputs ?
I've been using "incf PORT[BC},F" and "addwf PORT[BC],F instructions on ports
with DACs connected to control the position of the dot on a scope screen and I
havn't seen any problems.....

Peter.

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E-Mail: Peter Onion <ponion@srd.bt.co.uk>
Date: 09-Jan-02
Time: 15:30:07

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