> My question is anyone know how many cycles take this instruction > addwf PCL,F ? 2 BTW writing the same value back to PCL should be interpreted as a modification, so it is 2 even when the value of W is 0. BTW2 this holds for ALL instructions that write to PCL! Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.