mmm, i now know i should do the NOP thingy. The point here was that=20 by adding the extra BSF instructions, suddently the very sensitive=20 to the touch PIC is rocksolid ! Amasing that those 2 lines could make=20 it immune to my scope probe... Now that i know the putor is running this code goes down the toilet. And the real code, along w the 'real' problems begin ;-) [to be continued] > This is really still not great. You are probably better off doing: > Loop > bsf PORTB, 7 > nop > nop > bcf PORTB, 7 > goto Loop >=20 > The last line is OK relative to BSF/BCF due to the 2-cycle goto = instruction. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu