Harry H. Arends wrote: > Why putting a goto ISR at the ISR entry point and not the code. Probably so when some poor schmuck ports this code to a processor with more program memory he'll get obscure symptoms due to PCLATH problems. Or maybe it's the extra wasted two 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