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Changing IRQ

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12 replies

by netview

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I am installing an 802.11b network, using an Orinoco RG1000 gateway with PCI Adapters with Gold PC cards. An Agere support person said their cards did not work right using IRQs above 15. In two Emachines with XP the computer assigns the IRQ or either 16 or 17 even though 7 or 10 are available. Device mgr says these IRQs cannot be changed. How can I change them, and was the tech man correct when he said 16 or 17 would not work? The radio signal is good but no network name is seen.

12 replies

by rossenjohn

hi,
Try to assign a IRQ to the PCI socket trough the bios.Some bios allow you to assign a IRQ to a specific socket.then choose 10
Good luck

by netview

BIOS changes to the IRQ for this device were not allowed to be made either in the BIOS or in Device manager.

by thechas

XP overrides all IRQ settings in the BIOS.

Your only chance would be to un-install and remove all other hardware.
You will need to totally remove the information about the devices from the registry.
Install the PCI adapters, and hope that XP will assign a lower IRQ.

Then, add the other hardware back into the system.

Chas

by mdelyea

No points please, this is just a comment. If you remove all your hardware in XP and then reinstall it you may have to reactivate the OS.

by grimreality

First you should try to set the irq in the bios for the device so that no other device can take it. Also for the sake of saying I would not trust the salesman since he should no that there are only 16 irqs, starting at 0 and going up to 15 only.

by netview

IRQ changes not allowed. On remove and re-install the IRQs were either 16 or 17. (On another XP machine that is working properly it uses IRQ 17.)

by jason.pruitt

First, don't assume you Network Interface card doesn't work with current settings. You can do serveral things to check your card. Some NICs come with diagnostic software or you can ping a loopback address of 127.0.0.1 to see if the computer sees the card. Does Device manager say the card is working correctly? Test the cables and make sure you're not using a cross over when you need a straight through. You could try connecting a straight through to two standalone computers to see if they can "see" each other. Next I'd try putting them back on the network and try pinging the gateway's ip address. If the cards are working and the cables are fine and you are still getting "host unreachable" email me.

by netview

This answer does not apply. The writer did not even notice that I was using 802.11b (wireless) and not a wired network.

by jason.pruitt

Sorry wasn't up to speed on the IEEE 802.11b standard. That doesn't invalidate my suggestion of checking to see if the OS reconizes the NIC. You didn't say that device manager reconizes the card or says that the device is configured correctly. You didn't say that you tried pinging your default gateway or the card. Could be that your access point is in an area where the temp is too hot. Had that happen to me before with an access point located on top of an overhead projector. Moved it a few feet and everything worked fine. Have a nice day.

by netview

I have the wireless system working fine with a close up NT and a distant XP. One XP Emaching is close up and still assigns IRQ 16 or 17 and has came on line 5 times after tweaking. At those times it recognizes the PC card and continues to work fine for the day. After shut down and restart the Network is lost but the PC Card is still seen by the computer.

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