Applefile will not recognize an .RS232 driver configured as a character read-write device ($63). If .RS232 is changed to a write only device ($41), Applefile recognizes it and shows it under the printers available. If an RS-232 device is a write only device, the handshaking, XON/XOFF or ETX/ACK, will still function. XON/XOFF and ETX/ACK are not data per se and will be treated as handshaking. Therefore, a driver will still be found if it is configured as a write only device such as a printer, since the driver does not have to READ the printer. These same modifications will allow QuickFile III to use the .RS232 driver.