On mid range PICs interrupt latency is "three or four instruction cycles" which meets the criteria of "within several instruction times" rather neatly. > > On most chips a) is definitely wrong: an interupt is handled after > *each* instruction. You can of course argue that "within several > instruction times" is included within "after each instruction", but I > would consider that argumentative. > > Wouter > > > > > BillW > > > > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 __________________________________________ David C Brown 43 Bings Road Whaley Bridge High Peak Phone: 01663 733236 Derbyshire eMail: dcb.home@gmail.com SK23 7ND web: www.bings-knowle.co.uk/dcb --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .