What happens if I use a 30MHz crystal with a 16c84 (10MHz max?) of course it will be set to use a HS crystal... will it work? what will happen? will it work with an external clock? how accurate will the timing be? ... thanks, Osama _____________________________________________________ Osama ALASSIRY osama@qatar.net.qa osama@alassiry.com http://www.alassiry.com