P6 BIOS Must Configure Devices Behind PCI-to-PCI Bridge (159038)
The information in this article applies to:
- Microsoft Windows 95 OEM Service Release 2
- Microsoft Windows 95 OEM Service Release 2.1
This article was previously published under Q159038 SYMPTOMS
Devices behind a PCI-to-PCI bridge on a P6-based computer will be
disabled. The devices appear in Device Manager with either an exclamation
point in a yellow circle or a red "X," indicating a problem with the
device.
CAUSE
OEM Service Release 2 (OSR2) does not support the configuration of devices
behind PCI-to-PCI bridges on P6-based computers. The BIOS in P6-based
computers is required to configure the resources for devices behind the
bridge.
MORE INFORMATION
OSR2 can configure devices behind PCI-to-PCI bridges in protected mode on
Pentium- or 80486-compatible x86 processor-based computers (processors
prior to the P6). Therefore, it is possible to access devices behind the
PCI-to-PCI bridge without BIOS support for resource configuration.
Accessing the devices in real mode is not possible without the support of
the BIOS.
NOTE: The retail release of Windows 95 (version 950) does not support the
configuration of devices behind PCI-to-PCI bridges, requiring the BIOS to
configure all devices behind PCI-to-PCI bridges.
| Modification Type: | Major | Last Reviewed: | 9/30/2003 |
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| Keywords: | KB159038 |
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