When you finish changing the jumpers, carefully replace the memory card in its slot and secure it with the retaining screw.

Multi-function Card Jumpers

The jumpers on the multi-function card control the parallel port address and the serial port address. You normally address the parallel and serial ports in the computer as the primary ports (LPT1 and COM1). However, if you install an additional parallel or serial port and want it to be the primary port, you need to change the jumpers on the multi-function card so the built-in port becomes secondary (LPT2 and COM2).

The following table shows the jumpers on the multi-function card that control the parallel port.