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PCI-to-PCI Bridge Architecture

The PCI-to-PCI Bridge Architecture revision 1.2 establishes the minimum behavioral requirements that PCI-to-PCI bridges must meet to be compliant to the PCI Local Bus Specification. Recommendations and guidance on optional PCI-to-PCI bridge features are also provided by this specification. PCI-to-PCI Bridge Architecture Specification revision 1.2 was updated to include target initial latency requirements and edited for readability.

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PCI-to-PCI Bridge Architecture 1.2 (856k PDF)
PCI-to-PCI Bridge Architecture 1.2 Change Bar Document (713k PDF): This document is the change bar from PCI-to-PCI Bridge Specification 1.1 to 1.2.
Interrupt Line Register Usage ECN (64k PDF): The ECN modifies the paragraphs describing the Interrupt Line Register usage for the PCI-to-PCI-Bridge. The purpose is to clarify the differences between the usages on PC-compatible systems and DIG64-compliant systems.