The Unabridged Pentium 4 IA32 Processor Genealogy

The FSB and BSB

Refer to Figure 26-7 on page 670.

The FSB Protocol

The Pentium® II used the same FSB protocol as the Pentium® Pro.

The Processor Core and Bus Frequencies

The Pentium® II processor was available with core speeds from 233 to 450MHz. The system board logic provided the BCLK to the cartridge as well as to all other agents that resided on the FSB. On the cartridge, the BCLK was supplied to the processor core's PLL (Phase Locked Loop) and multiplied to develop the core's internal clock as well as the clock for the L2 Cache bus (i.e., the BSB).

As with the Pentium® Pro processor (see chapter 3 of the MindShare book entitled Pentium® Pro and Pentium® II System Architecture, Second Edition), the Pentium® II processor sampled its LINT[1:0], ...