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Chapter 3

Software Environment

20695H/0—March 1998

AMD-K6® Processor Data Sheet

Preliminary Information

Write Handling Control Register (WHCR). The Write Handling Control

WCDE bit, Write Allocate Enable Limit (WAELIM) field, and

the Write Allocate Enable 15-to-16-Mbyte (WAE15M) bit.

Figure 32 shows the format of WHCR. See “Write Allocate” on

page 177 for more information.

Figure 32. Write Handling Control Register (WHCR)

Memory

Management

Registers

T h e AMD -K 6 pr oce ssor c o nt r o ls segm ent e d me mory

management with the registers listed in Table 6. Figure 33 on

page 40 shows the formats of these registers.

Reserved

WAELIM

Note: Hardware RESET initializes this MSR to all zeros.

Symbol

Description

Bits

WCDE

Always program to 0

WAELIM

Write Allocate Enable Limit

7–1

WAE15M

Write Allocate Enable 15-to-16-Mbyte 0

Table 6.

Memory Management Registers

Function

Global Descriptor Table Register

Contains a pointer to the base of the Global Descriptor Table

Interrupt Descriptor Table Register

Contains a pointer to the base of the Interrupt Descriptor Table

Local Descriptor Table Register

Contains a pointer to the Local Descriptor Table of the current task

Task Register

Contains a pointer to the Task State Segment of the current task

AMD-K6 Datasheet(PDF) 57 Page - Advanced Micro Devices