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What is the typical IRQ's used for mo...

Trish's Escape from Hardware Hell Help Board » Setup and Configuration » All the Rest » What is the typical IRQ's used for modem and soundcard « Previous Next »

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Eric Ireland
Posted on Sunday, October 21, 2001 - 10:26 pm:   

My system: 800mhz Duron, AV7 mobo, 128mb ram, zoltrix modem, ati rage fury pro video, soundblaster 128 .
Need to know what the setup tht should be used for the modem and soundcard on this system. I think irq 5 for the modem and irq 7 for the soundcard ???

Let me know.
V (Vera)
Posted on Tuesday, October 23, 2001 - 8:24 am:   

this link is informative

from my own experience when putting together a system, after windows is installed, the first card i put in is the sound card to let it have the resources it wants.they often won't work correctly if the irq's get adjusted and they can't communicate through the channels they expect to. i usually see irq's 5,7, 9,and 10 as the choices. irq 7 is assigned for the first parallel port,lpt1, so anything else using that irq will cause problems if you have a parallel printer and want to print and use the other device thats sharing at the same time.
on one of my pc's with sound blaster 16, irq 7 is used only when in dos mode.
for the modem it depends on what kind of modem it is. i still use isa hardware modems which use the serial port resources 1+3- irq 4,com 2+4- irq 3
Posted on Sunday, October 28, 2001 - 11:15 am:   

Hey Eric,

Typically sound cards use IRQ 5 and modems use IRQ 4 or 3 if 4 is taken, but new hardware can sometime request specific setting (IRQ, input/output).

Motherboards with a PCI bus use IRQ Steering which assign the same IRQ to multiple devices.

If your not having problems with hardware conflicts or games your OK, but there are ways to adapt the original setting to your devices.

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