> XOR is the only operation in the pic which doesn't irrevocably destroy > information. The add and subtract instructions exhibit similar behaviour in that they don't "irrevocably destroy" information. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body