Question on using TOCKI to feed TMR0 for an F84A. - I assigned the prescaler to the WDT since I wanted TMR0 increment 1:1 with each low to high transition on TOCKI. I also set the OPTION reg up so that TMR0 source was the TOCKI/RA4 pin, increment on low to high transition. - Running MPLAB IDE sim however with the pin stimulus setup to toggle TOCKI or RA4 with each instruction showed that TMR0 would NOT increment. To debug (in case I did not have the simulator setup right) I ONLY changed the source of TMR0 to increment on clock cycles instead of TOCKI. That too showed that TMR0 would not increment. I could only get TMR0 to increment if I assigned the prescaler to it, and then the lowest prescaler value was 2:1. Am I doing something wrong? Or is there a bug in MPLAB IDE? (ver 6.3) Thanks, Dave -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads