> This is a lot more complicated to explain than to do Olin, understood. I'll work through it > Depending on the application, it might be simpler to just monitor > the change in the MSB of TMR1H: Scott, logging TMR1 rollovers did occur to me and it does seem applicable here -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist