Hi Bob, Andy,

> > Would it also be OK to add 50 to it, in case you might have been
> > busy with something else and it advanced to 1. I know I'm not
> > explaining myself very well, I hope you understand what I mean :-)
>
> I understand exactly what you mean... In fact, adding to (or
> subtracting from) TMR0 is the best way to reload it, for exactly the
> reason you describe.

If I am not mistaken, this 'benefit' would be almost lost if you
had other than a 1:1 prescaler as the prescaler value would be
cleared and lost.

I do make use of this technique for timing but the lost cycle/s
on the write to TMR0 need to be watched out for especially when
you use no prescaler.

Cheers
--
Kalle Pihlajasaari   kalle@ip.co.za   http://www.ip.co.za/ip
Interface Products   P O Box 15775, DOORNFONTEIN, 2028, South Africa
+ 27 (11) 402-7750   Fax: 402-7751    http://www.ip.co.za/people/kalle

DonTronics, Silicon Studio and Wirz Electronics uP Product Dealer