>When you say "I have 50 lines in which to write this." do you mean
>1) You have one 50 words of program memory available for this routine
>2) The routine must complete in 50 cycles
>3) Both 1 and 2

50 words of program memory.  I'd prefer it to complete in less than a few
hundred cycles if possible, but at this point I'll take anything.

I know I'm asking a lot.  I had thought of just counting the number of
pulses in a given time frame (e.g., .25 seconds), then multiplying it out to
a full minute, but the error would be more than a few hundred RPM, which
produces unacceptable error at slower speeds.  I'd have to count pulses for
at least a full second or two to get reasonable accuracy this way.  At 4MHz,
this would be a 24-bit number, which isn't too bad.  I was just hoping there
was an easier way.

Then there's always the problem of converting it to BCD :)

--Andrew
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