> Chip Weller wrote:
>
> > One word of caution, whenever you write to the TMR0 the prescaler is
> > cleared.  This does result in a more accurate single time until
> > overflow, but if you are trying to also keep track of longer term time
> > you will lose on average 1/2 of the prescaler ticks per write.
>
>

Firstly, if using a prescaler, when does the timer start counting? is it
after the prescale bit is set ??
Is the prescaler reset to 1:2 when a write occurs to the TMR0 register and
does this reset only affect the 3 prescaler bits?? or the whole
option_reg??)

Thanx
  Tim Lunn