Switched PCI and Next Generation Embedded PowerPC

This article presents a new approach: Switched PCI. Switched PCI utilizes a switching fabric to allow these data streams to pass from port to port across a multi-port bus switch without collision. This improves the burst performance and efficiency on the PCI and processor busses: a key element of I/O Processor performance. However, in defining such an embedded PowerPC-to-PCI bus switch it is important to recognize that system designers will want to utilize the bridge in both host and adapter card applications. This places additional architectural requirements on the proposed device. Therefore, a Switched-PCI approach is discussed in this paper within the context of the bus switch's role as both a host bridge and a bridge for a peripheral I/O adapter card.

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