>> Is there even one mid-range device that dosen't support the TRIS
>instruction
>> on ports A,B and C?
>
>Officially many of them don't, including the 16F872.  Some silicon, may,
>this rev, support the instruction without it being listed.  You definitely
>don't want to be writing TRIS in new code for these chips.


If you don't use TRIS, how you configure a port for input or output with
these devices?

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