I'm not aware of any registers in the standard PCI config space that will tell you the speed of the bus. Some PCI devices will make that information available, but not in a standard way. The BIOS of some higher-end systems might also tell you this information.
How about the busmaster parameters like PCI latency timer, etc?
Pete
True, those parameters are available, but the original question was about reporting the bus width and frequency, which are not available.
Scott
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