PCI Enable Bit?

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Wolf9466
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PCI Enable Bit?

Post by Wolf9466 »

In the PCI spec, it says, and I quote, "Bit 31 is an enable flag for determining when accesses to CONFIG_DATA are to be translated to configuration transactions on the PCI bus." What else could it be treated as, and why should the enable bit be set?
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Combuster
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Re: PCI Enable Bit?

Post by Combuster »

Reading configuration space requires a configuration transaction. If you don't set that bit, you don't get a configuration transaction, and thus no access to configuration space.
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