andrew kelley wrote: > Is there some sort of software or PIC code to time execution of > interrupts and functions and find out how much of the processor time > is spent doing each? Yes. The simulator has a "stopwatch" feature. It can tell you both elapsed time (if you correctly tell the simulator your oscillator frequency) and number of cycles. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist