What's all this TRIS stuff, anyway?

I repeately see discussions about how using this TRIS instruction
is such a naughty thing to do.  Now, "tristate" and "setting to
input" aren't exactly the same but I don't really see an
explicit tristate capability in the hardware.  Is there a
difference?   I don't really believe they want to take
away the ability to configure port direction.

I have been searching the literature and what I think the deal is
that you are still welcome to stuff numbers into the TRIS
registers as long as you do it yourself.   But there are,
or used to be, or are about to not be, special TRIS opcodes
that could stuff the number directly, without having to
code it in the usual way, and it looks like it would
even go into the other bank for you without your having
to play with the bank bits.

Stay away from that instruction, and just pretend the
microcontroller is a microcontroller, and set the
register yourself, and all will be well.

Did I get it right?

Barry

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