Thanks!  Yes, I meant a 4 Mhz crystal.  Forgot to take into account that it
is divided by four for the internal clock.

This actually helps me out more.  I can treat every interrupt as a 15
second interval...4 interrupts would be a minute.  :)

Thanks for everyone's help.

At 10:05 PM 5/23/2004, Jinx wrote:
> > Here's my attempt to answer my own questions.
> >
> > Timer0 can be either 8 or 16 bits.  So I think I want 16 bits...and the
> > largest prescalar is 256.
> > OK...so if I use a 4Mhz clock...
> >
> > -16 bits counts to 65,535.
>
>Close. 16-bit count is 65536 -> 16,777,216 with /256 pre-scale,
>which is 4.194304s @ 4MHz internal clock (16MHz crystal)
>
>Or 16.777216s if you meant a 4MHz crystal (1MHz internal clock)
>
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James Tu
james@2-bit-toys.com

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