> Briefly, your problem with your interrupt routine is that you > clear bit RBIF Yup. In the original post you wrote intend bcf PORTB,2 bcf INTCON,INTF <----Fails to happen... movfw _w retfie Is there a typo here or in dawn.asm ? -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu