Microsoft KB Archive/174733

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OPTi FireStar Chip Set Not Recognized by Windows 95


The information in this article applies to:

  • Microsoft Windows 95 OEM Service Release, versions 2, 2.1


Computers with an OPTi Fire Star 82c700 chip set may not pass the "PCI IRQ Routing Table Test" portion of the Windows Hardware Compatibility Test (HCT) 7.1. Error messages may include:

Error: Verifying IRQ Routing Link Values Error: Unknown Chipset. Cannot Verify. Problems were encountered with this machine's IRQ Routing Table that prevent it from being PC 97 Compliant.

The device may or may not function normally otherwise.


Windows 95 OEM Service Release 2 (OSR2) does not recognize or correctly support the OPTi Fire Star 82c700 chip set.


This issue is resolved by the following updated files for Windows 95 OSR2, and later versions of these files:

   PCIMP.PCI    version 4.00.1113  dated 9/8/97  7,648 bytes
   MACHINE.INF  (no version info)  dated 9/2/97  49,718 bytes 


Microsoft has confirmed this to be a problem in Microsoft Windows 95 OEM Service Release 2 (OSR2). An update to address this problem is now available, but is not fully regression tested and should be applied only to computers experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft does not recommend implementing this update at this time. Contact Microsoft Technical Support for additional information about the availability of this update.

This issue is resolved in Microsoft Windows 98.


For additional information about issues resolved by updates to these components, please see the following articles in the Microsoft Knowledge Base:

Q175590 Cardbus Cards May Not Work with Vesuvius Chip Set

For additional information about Windows 95 updates, please see the following article in the Microsoft Knowledge Base:

Q161020 Implementing Windows 95 Updates

Additional query words:

Keywords : kberrmsg kbhw osr2 win95
Issue type : kbprb
Technology : kbWin95search kbOPKSearch kbWin95OPKOSR2 kbWin95OPKOSR210

Last Reviewed: January 31, 2001
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