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PCI Express System Architecture by MindShare, Inc, Ravi Budruk, Don Anderson, Tom Shanley

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Standardized Usage Model

Background

Systems based on the original 1.0 version of the PCI Hot Plug specification implemented hardware and software designs that varied widely because the specification did not define standardized registers or user interfaces. Consequently, customers who purchased Hot Plug capable systems from different vendors were confronted with a wide variation in user interfaces that required retraining operators when new systems were purchased. Furthermore, every board designer was required to write software to manage their implementation-specific hot plug controller. The 1.0 revision of the PCI Hot-Plug Controller (HPC) specification defines:

  • a standard user interface that eliminates retraining of operators

  • a standard programming ...

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