Jinx wrote : > In Sean's case he has such a slow Fosc, > very long TMR0 period and s/w that is doing nothing else that > there is ample time and opportunity to poll T0IF... Now, having a slow Fosc doesn't give you more "time" realy, since everything have been slowed down. You still have exactly the same number of processor *cycles* (with is the only kind of "time" the processor knows about) between two TMR0 rollovers... Giving the same prescaler and all, of course. Jan-Erik. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist