AMD-K6-2ESLASH400AMZ datasheet(41/332 Pages) AMD

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Chapter 3

Software Environment

22529B/0—January 2000

AMD-K6™-2E Processor Data Sheet

Preliminary Information

Software Environment

This chapter provides a general overview of the AMD-K6-2E

processor’s x86 software environment and briefly describes the

data types, registers, operating modes, interrupts, and

instructions supported by the AMD-K6-2E architecture and

design implementation.

Th e s tepping of the Model 8 ve rs i o n of the proces sor

determines the implementation and format of ten Model-

Specific Registers (MSRs).

The AMD-K6-2E processor supports Model 8 steppings [F:8] in

any of eight possible model/steppings—Models 8/8, 8/9, 8/A, 8/B,

8/C, 8/D, 8/E, or 8/F.

Note that the name AMD-K6-2E processor by itself refers to all

steppings of the Model 8/[F:8] version.

3.1

Registers

The AMD-K6-2E processor contains all the registers defined by

the x86 architecture, including general-purpose, segment,

floating-point, MMX/3DNow!, EFLAGS, control, task, debug,

test, and descriptor/memory-management registers.

In addition to information about these registers, this chapter

provides information on the AMD-K6-2E processor MSRs.

Note: Areas of the register designated as Reserved should not be

modified by software.

AMD-K6-2E/400AMZ Datasheet(PDF) 41 Page - Advanced Micro Devices