P6 BIOS Must Configure Devices Behind PCI-to-PCI Bridge
Article ID: 159038
Article Last Modified on 9/30/2003
APPLIES TO
- Microsoft Windows 95
- Microsoft Windows 95
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.
Additional query words: 95
Keywords: KB159038