enpassant wrote:

> I get the following error message and can't figure out why?  I suspect
> it may have to do with the difference in the memory layout between
> chips???

  Not between the 16C84 and 16F84 it isn't!  It's a general warning.
Read the archives, searching for the term "bank".

  There's nothing wrong with the code, but in this case, it would be far
easier to use a preset mask with the TX bit cleared and MOVLW TXOFF
followed by TRIS PORTA in this case, and another mask with the TX bit
set later in the code to do the same thing.

  The main reason Peter Anderson's code *doesn't* do this, is that it is
a generic "snippet" and you need to determine the masks I suggest by
considering the other bit functions in port A.  Generality leads to
sloppy code.

>  How can I fix this.

  You suppress message 302 by putting
        errorlevel -302
at the start of the code.  While you're at it, please add
        errorlevel -224
into the start of your code or better still, into the P16F84.INC include
file, so that you never get the psychotic error message [224] from using
the essential TRIS instruction.
--
  Cheers,
        Paul B.