US Robotics 3Com Instrukcja Użytkownika Pobierz pdf (Strona 34)

TROUBLESHOOTING AND HELP RESOURCES

6-13

IRQ Assignment

0 System Timer

1 Keyboard

2 Cascade input (mandatory function)

3 COM2

4 COM1

5 Sound/Parallel Port 2 (LPT2)

6 Disk Controller (All internal floppy drives)

7 Parallel Port 1 (LPT1)

8 Real-time clock interrupt

9 Reserved

10 Reserved

11 Reserved

As you can see above, there are no default assignments for COM3 and COM4. In order

to use COM3 or COM4, you must assign it to an IRQ. This means sharing that IRQ with

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US Robotics 3Com Instrukcja Użytkownika Strona 34