Russell,

AFAIK, and I may be wrong, the 17X PIC instructions  are a superset
of the 16x PIC instructions.

If so, could you use a 16X version C in the interim  - this will give
you access to 17X hardware features but not the more "efficient"
(more CISC) instruction set?


I wondered that, but the PIC17 uses a 16 bit instruction and the PIC16 uses
a 14 bit instruction. Not knowing too much about microcontroller C
compilers I wasn't sure if the code created by the CCS compiler could be
used for the PIC17.  Does the with of the instruction matter ? Maybe I
could just use the compiler to create an intermediate ASM file and use
MPASM on that file ?.


Eric