Dan:
Thanks for the comments.
1)I'm aware of the constitution of the 10 bits of duty, but my question is
why?  If the period reg is 8 bits, any set of bits 9 and 10 at any time will
yield 100%.  Do I have that right?
2) In the retfie I do save via MC's published method the status and W regs.
When I goto out of the isr, I won't need the hardware stack contents (I hope
that's right), but maybe I should restore the registers.  The application is
too long to describe here.  Thanks.  JIm

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