How to determine the speed of the PCI bus attached?

[brad yu <bradyu2001@yahoo.com>]

Hi Guys,

I have an easy questions. 

Is there any bits in the configuration space that we
can read to determine the speed of the PCI bus that a
device is attached to? The 66MHz Capable Bit (Bit 5 in
the Status register)from what I understand only
showing the capability of the device as a 66MHz device
but the PCI bus it attached not necessary to be
running at 66MHz. So is there any way that we can
determine the speed of the PCI bus that a PCI device
is attached to?

Rgds,
Brad

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