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PCI bus, IRQ steering

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14 replies

by ric May 19, 2001 last reply Aug 17, 2001

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I have a cyrix 300m2 with 98Mb of mem, running win 98.
the motherboard has sound and graphics on board, but a freind of mine installed a soundblaster card, I tried and found i had conflicts. I also have Installed a voodoo 3 PCI card and a win modem(PCI).

In the device manager, It states that
"IRQ steering is disabled,IRQ table has some errors".

I frequently have computer crashes and a boatload of other stuff like, games freeze/reset to windows, shut down problems etc. Im not sure if this has anything to do with the IRQ's, and if not, I'll work on that lot later.

how would I fix the IRQ table?
IRQ's:
0- system timer
1- standard keyboard
2- programmable interrupt controller
3- communication port (com2)
4- communication port(com1)
5- creative AWE64 gold
6- standard floppy disc controller
7- printer port (lpt1)
8- system CMOS/real time clock
10- 3dfx voodoo3
10- IRQ Holder for PCI steering
10- SIS 7001 PCI to USB open host controller
11- conexant PCI modem enumerator
11- IRQ holder for PCI steering
12- PS/2 mouse port
13- Numeric data processor
14- primary IDE controller (dual fifo)
14- SIS 5513 Dual PCI IDE controller
15- Secondary IDE controller (dual fifo)
15- SIS 5513 Dual PCI IDE controller.

I noticed that there is no IRQ 9, three things on IRQ 10, and that ther are two " IRQ holder for PCI steering"....

argghhhh.......help

:)
thanks for your time reading all this

14 replies

by sixfourtykilo May 19, 2001

It doesn't appear that you have any IRQs conflicting with each other according to the list that you have given, however, have you entered the BIOS and disabled any and all built in hardware (ie, sound, video)? This will cause a large problem if youhave not. The USB controller is always something that allows its IRQ to be shared, and 10 and 11 are generally where your video card ends up. Your IRQ 9 is not showing up because your IRQ steering remains on 9. Whenever you have a "plug and pray"device that requires the use of an IRQ, windows gives it that IRQ holder - its perfectly normal, and you may see a few of them. Try these things and see where the results end up:

First - check and double-check to make sure that built in sound, video and maybe even built in modem have been disabled.
Second - check in the bios for things like, reserved IRQs, video shadowing, etc, and disable them
Third - remove the IRQ holder for PCI steering while in safe mode and have windows redect it.
Fourth - if you find that none of this helps, remove your third-party sound and video hardware and see if windows still has problems.

Good Luck!
640k

by ric Aug 17, 2001

The question was auto-closed by TechRepublic

by gazza-sa May 19, 2001

Yeah one thing to try is to boot the computer in safe mode, enter the device manager and remove all, repeat all, of the devices installed.
You will find all kinds of drivers left over from previous hardware installations.
Reboot the machine, go into the cmos & check setting there, ie plug & pray enabled & etc.
Restart windows & do a hardware auto detect, make sure you have all your drivers handy.
Windows should sort itself out then

Hope this helps.

by ric Aug 17, 2001

The question was auto-closed by TechRepublic

by fenaikh May 19, 2001

Hi
i tried to explain put not enough space 1930 char only.you can see IRQ9 read the first article .
pls read these article
-----------------------------
Article ID: Q184075
Description of Microsoft System Information (Msinfo32.exe) Tool
http://support.microsoft.com/support/kb/articles/Q184/0/75.ASP
--------------------------------
Article ID: Q185956
Description of the Microsoft Hardware Diagnostic Tool
http://support.microsoft.com/support/kb/articles/Q185/9/56.ASP
-----------------------------------
Article ID: Q182604
Description of PCI Bus IRQ Steering
http://support.microsoft.com/support/kb/articles/Q182/6/04.ASP
------------------------------------
good luck

Mohamed

by ric Aug 17, 2001

The question was auto-closed by TechRepublic

by vlad_ezh May 21, 2001

AFAIU, it's a motherboard with Sis chipset - therefore try to install it's own
Sis PCI IRQ Routing Table Miniport Driver:
http://srd.yahoo.com/DOWNLOAD/Mainborad/SiS/sisirq9x.exe
and/or Sis Chipset utility
ftp://ftp.nsysu.edu.tw/Hardware/vendor/SiS/utility/Sischip.exe
It can help with correct Irq Routing.

The seconf way: Go to
Device Manager
->System Devices
-> Pci Bus
in Pci Bus Properties goto to IRQ Steering.
Here you can check is Irq stering enabled or not and from what is the IRQ Table readed.
Try to get IRQ Table from ACPI BIOS, Ral mode Pcibios etc...
Also inPci bus Properties Settings you can modify default device enumeration -using hardware or using bIOs.

Good Luck.

by ric Aug 17, 2001

The question was auto-closed by TechRepublic

by johnh May 22, 2001

All the IRQ's look ok..... the only one I would question is the winmodem IRQ 11.... can you disable one of the com ports in the bios and get the modem to take that irq?

Lockups ad etc might just be other things..... Video drivers, Sound card drivers, MB Drivers, modem etc....

Try updating the device drivers for the whole system, if Win98 or se run system file checker for corrupted files... and if possible update bios (be careful though...)