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category: Software
RAM: 192
Processor: Pentium
MHz: 300
Operating System: Windows 98
Date: 05 Oct 1999
Time: 09:48:07

Description:

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?

The Answer

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 selected. 

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 conflicts occur.
 
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. 

Reply

Problem Status: Not fixed, need more help
Date: 10/08/99
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? Thanks.

Answer

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 ROM drive.

 

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