At 02:33 PM 11/4/97 -0500, you wrote:
>    I am a little confused about these two instructions. I know what they
>do, but my confusion is in the handling of the carry flag. The manual says
>shift through carry, which I interperate to meaning that if bit 7 is set and
>you RLF the carry flag is set. But when I read the MPASM manual it has a
>diagram that suggests if you set the carry flag and RLF bit0 of the file
>register is set, is this what happens? It would be very usefull for my
>purposes if this is how it worked. TTYL

This is really stands for rotate through carry. You roll the bits out the
one side, into the carry bit, and back in the other side. Most MPUs,CPUs,
and MCUs have a similar instruction. A shift is just moving the bits out of
the byte with out moving any thing in, or moving it in from a bit flag. Two
different but similar concepts, but the documentation seams to have them
confused.

Shannon Spurling
MOREnet
Network Operations
shannon@more.net
1805 E. Walnut Street
Columbia, MO 65201
(573) 882-4548

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