Microsoft KB Archive/164873

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PCI Device Not Configured and Resources Unassigned

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Q164873

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The information in this article applies to:


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

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SYMPTOMS
When Windows 95 OEM Service Release 2 (OSR2) is installed on your computer, some PCI devices may not be configured properly. Device Manager may display an exclamation point in a yellow circle next to the devices, with text stating that the driver did not load or the driver is incorrect for the hardware. The Resources tab may display an IRQ resource without assigned memory resources.

The same device may be configured correctly in Windows 95 or Windows 95 OEM Service Release 1.

CAUSE
If the PCI device does not request any memory resources in its first Base Address register (BAR0), the remaining Base Address registers may not be decoded properly. The requested resources may not be assigned, and the device may not function.

RESOLUTION
This issue is resolved by the following updated file for Windows 95 OSR2, and later versions of this file:

  PCI.VXD  version 4.00.1116  dated 2/19/97  42,271 bytes

STATUS
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.

MORE INFORMATION
For additional information about issues resolved by updates to this component, please see the following articles in the Microsoft Knowledge Base:

Q182591 CardBus Cards Not Enumerated on Some PC Card Controllers

Q173677 Audio Problems with Cirrus Logic PD6832 CardBus Controller

Q170324 CMD PCI-0646U Accessed in Compatibility Mode in OSR2

Q164222 CardBus Card in Docking Station May Not Be Configured

Q163938 Inserting Multifunction PC Card May Hang Computer

Q159543 Intel ProShare PC Card May Hang Computer

Q159492 PC Card Device Not Enumerated When Reinserted

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

"ARTICLE-ID: Q161020 Implementing Windows 95 Updates"

This behavior has been reported to occur with the following PCI devices:


 * PCI-MXI-2 by National Instruments
 * VXIpc-800/700 Series by National Instruments

Additional query words: 95

Keywords : kbhw osr2 win95

Issue type : kbprb

Technology : kbWin95search kbOPKSearch kbWin95OPKOSR2 kbWin95OPKOSR210