also dont take the MIkro timer calculator at its word

i been testing lower osc +PPL for power usage ( lower the main osc the lower the current use)

when using thier calculator for 1mhz main osc + PPl - so entering the value of 4Mhz on the caclulator FOR 10MS , gives T0CON = $88 , TRM0H = $D8 TRM0L = $F0

which is does not give you a 10ms time it give you a 40ms time , as the t0con setting bit 3 uses the base osc bypass prescale ,

entering in the a main osc of 1mhz AND 10MS interupt give a T0CON= $88, TRM0H=F6,TRM0L=3C - which is correct

handy tool just need to know its not correct when timer0 on 18f gives a tocon = $88 - bypassing the prescaler