> .... I guess these are the same guys that insist that biasing > the protection diodes of a PIC in an R-only RS-232 receive circuit is OK > and that a PC will receive 0..5V RS-232 OK? Now now Wouter, that's my hobby horse :-) RM -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.