John J. McDonough wrote: > When you add a serial port to an XP system via a PCI plug and pray > card, XP assigns a nonstandard address to the serial port. Any > software expecting to find a "normal" serial port will not recognize > the port. Any software expecting to find a normal serial port will use system calls to enumerate serial ports and work fine. The port addresses are of no consequence to application software. Unless you've got an archaic DOS program, it will have no idea what the port addresses are nor will it have any reason to care. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist