Start with these articles for some clues.
Description of PCI Bus IRQ Steering
http://support.microsoft.com/?kbid=182604 (W95/98/se/ME Jul. 6, 2001)
How to Disable PCI Bus IRQ Steering in Windows
http://support.microsoft.com/?kbid=182628 (W95/98/se/ME Jul. 6, 2001)

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Henri Leboeuf
Web page: http://www.generation.net/~hleboeuf/index.htm
> i re - installed windows 98 and my pc cannot find pci
> ethernet controller , the driver is not installed and
> windows cannot locate the driver in the installation cd