This half size card provides 2 industry standard RS232 serial COM ports using one 9 pin and one 25 pin Male ‘D’ connector, both ports are optically isolated to 1500 Volts DC/1000 Volts AC. Each serial port may be jumper configured as COM1 -COM8 with interrupt line jumpers set to IRQ 2-7, 10-12, 14-15. Serial Solutions Device Driver CD contains software for Windows 98, Windows 95, Windows Millennium, Windows NT4, Windows 3.x, DOS and OS/2. Informative manuals and sample programs are supplied with full source code on CD! The printer port can be set to bi-directional mode, for scanners, file transfers etc. The ports can be configured in DOS as LPT 1 to LPT 3. In Windows the ports can be configured to any logical port number using the Ports applet in the Control Panel.