Chapter 28. Pentium® II Software Enhancements
The Previous Chapter
This chapter provided a detailed description of the power management modes found in all IA32 processors starting with the Pentium® II processor. Note that the Pentium® M processor added one additional mode, Deeper Sleep, and a description can be found in “Enhanced Power Management Characteristics” on page 1429.
This Chapter
This chapter provides a detailed description of the software enhancements first implemented in the Pentium® II processor. This discussion is directly applicable to all subsequent IA32 processors. This includes:
The Pentium® II and Pentium® III MSRs.
The Fast System Call/Return Instruction Pair.
The FP/SSE Save/Restore Instruction Pair.
New/Altered Exceptions. ...
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