Thank you all for the answers. Is it correct to state that interrupts that occur during the no-interrupt-period will fire the interruptroutine as soon as the GIE bit is set again? Reading the datasheet I would expect this to be the case, but it is not explicitly written. Marcel -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.