> I never did figure this bug out. I ended up swapping the DS275 for a MAX233 > and all is well, if that makes any sense. Is is possible that one of these inverts and the other doesn't? ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu