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The Unabridged Pentium 4 IA32 Processor Genealogy by Bob Colwell, Tom Shanley

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Request Phase Parity Checking

ChipSet Request Phase Parity Checking and Reporting

Refer to Figure 49-2 on page 1207. The example system shown is a PCI Express-based system and the device that connects the processors to the remainder of the system is referred to as the Root Complex. In a PCI or a PCI-X based system, it is referred to as the North Bridge or as the Memory Control Hub (MCH). The device that connects the processors to the remainder of the system is part of the chipset.

Figure 49-2. An Example System Block Diagram

When a FSB agent other than the chipset (e.g., a processor) initiates a transaction on the FSB, the ...

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