Figure A-5.Main circuit board jumpers
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 (JPT2 and COM2).
Table A-3 shows the jumpers on the multi-function card that control the parallel port.
Table A-3. Multi-function card jumper settings for parallel port
| Jumper | number | Function | | |
3 | 4 | 10 | | | |
A | A | A | Enable built-in port as primary • |
B | A | B | Enable built-in port as secondary | |
A | B | A | Enable compatibility with IBM monochrome |
| | | display/printer | adapter |
B | B | | Disable built-in | port | |
• Default setting
