Does anyone know how to write a QBASIC command to transfer a byte or = multiple sequence of bytes to the parallel port of a PC, and also to = read a byte or multiple sequence of bytes from the parallel port? Also, = the same question applies to the serial port. I would appreciate any = information on this software question. Regards, Richard -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.