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Initializing Intel® 80312 I/O Companion Chip Secondary PCI Bus Private Devices
Any device that connects to a PCI bus is required to have a configuration
header that allows a system to identify and control it. An initialization
procedure, typically a host BIOS, searches for these configuration headers
and initializes all devices that it locates throughout the entire PCI Bus
hierarchy. When a system designer wants to keep a PCI device ?private?,
in order to utilize it in a sub-system, the device must not be detected by
the initialization procedure.
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