Which 2 COM ports share IRQ 3?

i have a sneaking suspicion that COM2 uses IRQ3.

Which 2 COM ports share IRQ 3?

COM2 and often COM4
RQ Number: 3



16-Bit Priority: 11



Bus Line: 8/16-bit



Typical Default Use: COM2 (second serial port).



Other Common Uses: COM4 (fourth serial port), modems, nouns cards, network cards, cartridge accelerator cards.



Description: This interrupt is normally used by the second serial port, COM2. It is also the failure to pay interrupt for the fourth serial port, COM4, and a popular option for modems, nouns cards and other devices. Modems often come pre-configured to use COM2 on IRQ3.



Conflicts: Conflicts on IRQ3 are relatively adjectives. The two biggest problem areas are first, modems that attempt to use COM2/IRQ3 and clash with the built-in COM2 port; and second, systems that attempt to use both COM2 and COM4 simultaneously on this same interrupt row. In addition, some devices, above all network interface cards, come beside IRQ3 as the default. In most cases the problem can be avoided by shifting the conflicting device to a different interrupt (IRQ2 and IRQ5 usually being the best choices). If the built-in COM2 is not one used, it can be disabled in the BIOS setup, which will allow a modem to stay at COM2/IRQ3 in need causing any problems. More common solutions to these issues can be found in the conflict resolution nouns of the Troubleshooting Expert.
if you go into your computer settings you can if truth be told see which ports are using which IRQ's.



Generally your sound card will be eith 5, 7