Just to clarify a point (and be exceedingly anal).

>      SUBLW 0x06         ;no just d3-d0
>
>does NOT subtract 6 from the W register.
>
>this really subtracts the W register from 6, not exactly what you wish.

Actually, subtraction in the PIC adds the Negative to the number:

       SUBLW 0x06

Is Actually:

  w = 6 + (( w ^ 0x0FF ) + 1 )

This leads to all kinds of wild and wonderful things.  Before using either
subtract in the PIC, write a few of simple programs to experiment with
subtract and see what the results are before using them in the program.

>the trick i use to get around this one is to add -6
>
>      ADDLW 0x00-0x06   ; subtract 6 from W

Good Trick and one that is more intuitive than using the "SUBLW" instruction.

myke

"One must invoke enough raw truth to punch a hole in the world" - Darl Af