If you leave off the 'a' parameter in a command, is does it default to 0 (Access Bank) or 1( use BSR)? decf register1, 0 Which is that the same as: Decf regsiter1, 0, 0 Or=20 Decf register1, 0, 1 Thanks Shawn -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu