Thanks for the help so far guys. Usually I wouldn't wuss out and
ask but it's been one of those weeks. Anyway, hink I'm getting
a grip on it now

I did some testing this morning and got these results. The nominal
100ms delay is 100.496ms as measured using Stopwatch, so the
figures below will have some crystal tolerances

CONFIG  FOSC= XTPLL_XT

3.2768   100.497ms (3.2768 * 24PLL = 39.3216), which is the
Fosc I'd like to use. Super

Couple of other crystals in that area

3.579545  91.982ms = (3.2768/3.579545) * 100.496
3.6864    89.336ms = (3.2768/3.6864) * 100.496

Checking out a scaler

CONFIG  CPUDIV = OSC4_PLL6

(3.2768 * 24 PLL) / 6 = 13.1072MHz => 301.492ms = 100.496 * 3

The comments in 4550.inc were actually quite helpful when used
with the datasheet

>From what I can gather then -

If you want to use USB, you'd have to use a, for example, 4MHz
crystal to get the 96MHz so that the USB module is running at
a compliant speed

If you also wanted a 'non-decimal' clock for comms etc, then a
separate crystal should be used on the secondary oscillator to
run the core and peripherals

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist