PCI Express: Difference between revisions
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Reword to note about PCIe config |
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==Extended Configuration Space== |
==Extended Configuration Space== |
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The PCI Express bus extends the [[PCI#Configuration Space|Configuration Space]] from 256 bytes to 4096 bytes. This extended configuration space *cannot* be accessed using the legacy PCI method (through ports 0xCF8 and 0xCFC). Instead, an [[#Enhanced Configuration Mechanism]] is provided. |
The PCI Express bus extends the [[PCI#Configuration Space|Configuration Space]] from 256 bytes to 4096 bytes. This extended configuration space *cannot* be accessed using the legacy PCI method (through ports 0xCF8 and 0xCFC). Instead, an [[#Enhanced Configuration Mechanism]] is provided. |
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However, the legacy configuration space for PCI-E devices can still be accessed using the latter. |
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===Changes from the PCI Configuration Space=== |
===Changes from the PCI Configuration Space=== |
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