Chapter 55. Pentium^® 4 FSB Miscellaneous Signals

The Previous Chapter

This chapter provided a detailed description of FSB Central Agent transactions. It included:

• Point-to-Point vs. Broadcast.

• The Interrupt Acknowledge Transaction.

• The Special Transaction.

• The BTM Transaction Is Used for Program Debug.

This Chapter

This chapter provides a detailed description of FSB signal that were not described in earlier chapters.

The Next Chapter

This chapter provides a detailed description of the software enhancements implemented in the Pentium® 4 processor. This includes:

• Miscellaneous New Instructions.

• Enhanced CPUID Instruction.

• The SSE2 Instruction Set.

• The SSE3 Instruction Set.

• Local APIC Enhancements.

• The Thermal Monitoring Facilities.

• FPU Enhancement.

• The MSRs.

• The Machine Check Architecture.

• Last Branch, Interrupt, and Exception Recording.

• The Debug Store (DS) Mechanism.

• New Exceptions.

• The Performance Monitoring Facility.