pci總線協議:

This document contains the formal specifications of the protocol, electrical, and
mechanical features of the PCI Local Bus Specification, Revision 2.3, as the production
version effective October 31, 2001. The PCI Local Bus Specification, Revision 2.2,
issued December 18, 1998, is superseded by this specification.
Following publication of the PCI Local Bus Specification, Revision 2.3, there may be
future approved errata and/or approved changes to the specification prior to the issuance
of another formal revision. To assure designs meet the latest level requirements,
designers of PCI devices must refer to the PCI SIG home page at http://www.pcisig.com
for any approved changes.

 The PCI Local Bus has been defined with the primary goal of establishing an industry standard,high performance local bus architecture that offers low cost and allows differentiation.While the primary focus is on enabling new price-performance future system requirements,it is important that a new standard also accommodates future system requirements and be applicable across multiple platforms and architectures.