Computer Hope

Hardware => Hardware => Topic started by: Raptor on May 24, 2005, 07:57:04 AM

Title: Changing the IRQ of hardware devices in XP
Post by: Raptor on May 24, 2005, 07:57:04 AM: Windows XP does not let me configure the IRQ of devices such as the soundcard. The option to do is simply greyed out.

Quite a while ago, I was able to change the I/O adresses, however, they would jump back to their default settings as soon as I clicked OK.

What could be the cause of these two problems and how do I solve them?
Title: Re: Changing the IRQ of hardware devices in XP
Post by: dl65 on May 24, 2005, 12:55:32 PM: Raptor ......This might possibly solve the issue .

http://support.winnov.com/general_info/Resource%20conflict/IRQ_conflits_win2KwinXP.htm

dl65 ::)
Title: Re: Changing the IRQ of hardware devices in XP
Post by: Raptor on May 24, 2005, 01:28:59 PM: Quote
Note that Windows 2000 and XP cannot rebalance resources in the same way that Microsoft Windows 98 does. After PCI resources are set, they generally cannot be changed.

Then why does Microsoft recommend you change IRQ settings should a conflict have occured?
Title: Re: Changing the IRQ of hardware devices in XP
Post by: merlin_2 on May 24, 2005, 02:03:57 PM: Well IRQ's - Prioritizing

Start/Run/Regedit
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\PriorityControl. Create a new DWORD value called IRQ8PRiority and set the data to 1, reboot.
Title: Re: Changing the IRQ of hardware devices in XP
Post by: Raptor on May 24, 2005, 03:00:13 PM: And what exactly will that do?
Title: Re: Changing the IRQ of hardware devices in XP
Post by: merlin_2 on May 24, 2005, 03:41:15 PM: read your post that you have written!

---------------------------------------------------------------------
Quote:#~

Windows XP does not let me configure the IRQ of devices such as the soundcard. The option to do is simply greyed out. velociraptor
Title: Re: Changing the IRQ of hardware devices in XP
Post by: Raptor on May 25, 2005, 04:58:19 AM: That doesn't quite answer my question, Merlin.

I assume that from what you are trying to tell me, you are saying the options will be avaible again. Correct?
Title: Re: Changing the IRQ of hardware devices in XP
Post by: merlin_2 on May 25, 2005, 11:40:36 AM: Yes:).........backup reg before making any changes
as always...........
Title: Re: Changing the IRQ of hardware devices in XP
Post by: Raptor on June 27, 2005, 02:16:07 AM: Adding that registry value did naught but making Internet images load slower..
Title: Re: Changing the IRQ of hardware devices in XP
Post by: Sidewinder on June 27, 2005, 06:26:39 AM: This may shed some light:

http://support.microsoft.com/default.aspx?scid=kb;en-us;315278&FR=1&PA=1&SD=HSCH

Good luck. 8)
Title: Re: Changing the IRQ of hardware devices in XP
Post by: Raptor on June 27, 2005, 08:33:36 AM: That does indeed explain.

Are you not able to change IRQ settings either, Sidewinder?
Title: Re: Changing the IRQ of hardware devices in XP
Post by: Sidewinder on June 27, 2005, 11:26:50 AM: Either I've been incredibly lucky or XP really knows what it's doing. Haven't had any conflicts either with this laptop (xp home) or my desktop (xp pro). Which is good cause I wouldn't know how to go about fixing.

I was under the impression that the HAL checked out all your devices and assigned the IRQ's accordingly. This laptop has 9 devices on IRQ 10. From what I read, XP does not rebalance the IRQ's like Win98 did.

You can force another HAL during installation (I guess this is for the DIY crowd):

http://support.microsoft.com/kb/299340/?FR=1

Is your soundcard in conflict?

8)
Title: Re: Changing the IRQ of hardware devices in XP
Post by: Raptor on June 27, 2005, 11:32:55 AM: I wish to lower the IRQ of my soundcard to an IRQ below 10 or 7. This will help me better configure the sound drivers for older games, as they often do not allow you to go higher than 7 or 10.

Although often IRQ 5 or 10 will work for SoundBlaster Pro configuration, but the sound is choppy.

Am I wrong in thinking that lowering the IRQ would help solve this problem?

I think I shall leave it up to HAL, not quite worth reformatting...
Title: Re: Changing the IRQ of hardware devices in XP
Post by: merlin_2 on June 27, 2005, 12:37:34 PM: either remove the sound card from the device manager and re-boot >>and see ifwinxp allocates an new irq for it ........or take the card out and put in in another port....