On Sat, 7 Aug 2010, Jan-Erik Soderholm wrote: > RS controls *where* to write (or read), not if one writes or not. "where" =3D=3D "when" ??? Regards Sergio Masci --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .