Windows 9x & NT
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Operating System: Windows 98
Date: 05 Oct 1999
I upgraded my sound with a Creative SoundBlaster PCI512. I also
upgraded my bios.
All the installations were successful, there are no IRQ conflicts.
Neither Creative or Microsoft have been any help. I followed the helpfile
solution, also no help. My PCI steering is disabled due to errors on the
table. How do I enable my PCI steering?
To enable and disable PCI Steering: Click Start
->Settings ->Control Panel and double-click the System icon.
Click the Device Manager tab. Double-click System Devices.
Double-click PCI Bus, and then click the IRQ Steering tab.
IRQ Steering may be displayed as disabled in Device Manager for any of the following reasons:
The IRQ routing table that must be provided by the BIOS to the operating
system may be missing or contain errors. The IRQ routing table provides information on how the motherboard is configured for PCI IRQ's.
The Use IRQ Steering check box is not selected.
The "Get IRQ table from Protected Mode PCIBIOS 2.1 call" check box is not
Your computers BIOS may not support PCI bus IRQ steering. For more information, contact the manufacturer of your BIOS.
When PCI bus IRQ steering is enabled, Windows dynamically assigns or
"steers" PCI bus IRQs to PCI devices. If there are IRQ conflicts between PCI
devices, you may need to disable PCI bus IRQ steering to determine where the
The following settings determine which routing tables Windows uses when programming IRQ steering:
Get IRQ table using ACPI BIOS:
When this check box is selected, the ACPI BIOS IRQ routing table is the first
table Windows tries to use to program IRQ steering. If a PCI device is not working properly, click this check box to clear it.
Get IRQ table using MS Specification table:
When this check box is selected, the MS Specification routing table is the
second table Windows tries to use to program IRQ steering.
Get IRQ table from Protected Mode PCIBIOS 2.1 call:
When this check box is selected, the Protected Mode PCIBIOS 2.1 routing table
is the third table Windows tries to use to program IRQ steering.
Get IRQ table from Real Mode PCIBIOS 2.1 call:
When this check box is selected, the Real Mode PCIBIOS 2.1 routing table is
the fourth table Windows tries to use to program IRQ steering.
NOTE: By default, the "Get IRQ table from Protected Mode PCIBIOS 2.1 call"
check box is not selected. You should only click this check box to place a check mark if a PCI device is not working properly.
IRQ Holder For PCI Steering may appear under IRQ Routing Status even though PCI bus IRQ steering is disabled. This
can occur if the IRQ settings are being read by your computer's BIOS. For information about modifying the BIOS, contact
your BIOS manufacturer.
Problem Status: Not fixed, need more help
Time: 08:20 AM
The bios is Award 4.51 and has already been upgraded with the latest
info from the manufacturer. The checking and unchecking of the various
table selection boxes are the instructions in the help file, I tried this
previous to my inquiry, also no effect. Any other possible solutions?
If you tried every setting in the control panel under the
PCI Bus it sure sounds like PCI steering is disabled in the BIOS.
Although, you may have corrupt Windows 98 system files that are causing
the problem. You can run the System File Checker which will verify
all files and prompt you if any are corrupt. This is located in the
System Information program. It is found under the Start button->
Programs-> Accessories-> System Tools-> System Information.
Under the Tools menu run the System File Checker and the Registry Checker.
It will fix problems in the Registry and will check your system files for
corruption. Have your Windows 98 CD handy because if it finds any
corrupt files you will need to put it in and point the program to the CD