Verify Com Ports

[raksasas]

Can someone verify these as to which com port they pertain to?

3F8/IRQ4
2F8/IRQ3
3E8/IRQ7
3E8/IRQ5

 

[jonjayal]

3F8/IRQ4 = COM1
2F8/IRQ3 = COM2
3E8/IRQ7 = COM3
2E8/IRQ5 = COM4

These are by default though and can be modified in the BIOS

 

[Lord of Shadows]

Here are some standards...

IRQ 0 Timer channel 0 (May mean "no interrupt". See below.)
IRQ 1 Keyboard
IRQ 2 Cascade for controller 2
IRQ 3 Serial port 2
IRQ 4 Serial port 1
IRQ 5 Parallel port 2, Sound card
IRQ 6 Floppy diskette
IRQ 7 Parallel port 1
IRQ 8 Real-time clock
IRQ 9 Redirected to IRQ2
IRQ 10 not assigned
IRQ 11 not assigned
IRQ 12 not assigned
IRQ 13 Math co-processor
IRQ 14 Hard disk controller 1
IRQ 15 Hard disk controller 2

Only problem is you can set any memory range and irq at boot up, but I dont think people have done that for years. It should match up correctly. In windows you can go to device manage -> Ports then select a port and go to its property dialog's resource tab and it should tell you what irq and mem range is being used.