At 03:07 PM 11/10/00 -0800, Andrew Warren wrote: > Some PICs don't miss portb-change interrupts even if the > pin-state changes during an explicit read; if you're using one of > those chips, you'll never see the problem. Hi Andy. I assume by the above statement that there certain versions of PIC that don't have the problem? Do you recall which part numbers those might be? dwayne Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 16 years of Engineering Innovation (1984 - 2000) * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.