PCI - IRQ Placeholder

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philip dybel - 31 Oct 2003 23:15 GMT

I can't get rid of "IRQ Placeholder for PCI" at IRQ 11.
I run "System Information" (Microsoft 4.10) -
under "Hardware Resouces / IRQs", IRQ 11 is ALWAYS used
by "IRQ Holder for PCI Steering". I can't get rid of
this, and since it shares IRQ 11 with "U.S. Robotics 56K
Voice PCI" Modem (I can't change it's IRQ Setting), I'm
concerned that this IRQ Sharing is slowing down my Modem.
Yesterday I did "Control Panel / System / Device
Manager"; Under "System devices" I found a "PCI
Placeholder" entry and Removed it - it's not there now.
Running "Regedit", "HKEY_LOCAL_MACHINE / Enum / PCI /
IRQHOLDER", there's a "IRQ0B" Folder (IRQ 11?) that I
Deleted, later Renamed to "IRQ15", but after Restart,
System Info. shows IRQ Placeholder is Still at 11.
How do I GET RID OF PCI's IRQ PLACEHOLDER?

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Jeff Richards - 01 Nov 2003 00:30 GMT

IRQ sharing with the PCI placeholder is not going to slow down the modem.
If you really do want to remove it (which is not recommended) untick the Use
IRQ Steering entry in the IRQ Steering tab of the PCI bus device properties
in Device Manager. You should set everything else you have changed back to
how it was.
--
Jeff Richards
MS MVP W95/W98

> I can't get rid of "IRQ Placeholder for PCI" at IRQ 11.
> I run "System Information" (Microsoft 4.10) -
[quoted text clipped - 11 lines]
> System Info. shows IRQ Placeholder is Still at 11.
> How do I GET RID OF PCI's IRQ PLACEHOLDER?

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