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參數(shù)資料
| 型號： | 21329 |
| 英文描述： | AMD-K6 Processor Power Supply Design Application Note AMD-K6 Processor Bios Design Application Note |
| 中文描述： | 的AMD - K6處理器電源設(shè)計應(yīng)用指南的AMD - K6處理器的BIOS設(shè)計中的應(yīng)用說明 |
| 文件頁數(shù)： | 26/52頁 |
| 文件大小： | 687K |
| 代理商： | 21329 |
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16
Model-Specific Registers (MSRs)
AMD-K6
Processor BIOS Design
21329L/0—December 1999
AMD-K6
Processor Models 6, 7 and AMD-K6-2 Processor Model 8/[7:0]
The AMD-K6 processor Models 6 and 7 and the AMD-K6-2
processor Model 8/[7:0] provide the following MSRs. The first
four M
SRs are described in “Standard MSRs” on page 15. The
contents of ECX selects the MSR to be addressed by the
RDMSR and WRMSR instruction.
I
Machine-Check Address Register (MCAR)—ECX = 00h
Machine-Check Type Register (MCTR)—ECX = 01h
Test Register 12 (TR12)—ECX = 0Eh
Time Stamp Counter (TSC)—ECX = 10h
Extended Feature Enable Register
(EFER)—ECX = C000_0080h
Write Handling Control Register
(WHCR)—ECX = C000_0082h
I
I
I
I
I
All steppings (F:0) of the AMD-K6-2 processor Model 8 support
the following MSR, and the bits and fields within this MSR are
defined identically:
I
SYSCALL/SYSRET Target Address Register
(STAR)—ECX = C000_0081h
Extended Feature
Enable Register
(EFER)
The Extended Feature Enable Register (EFER) contains the
control bits that enable the extended features of the AMD-K6
processor. Figure 2 shows the format of the EFER register, and
Table 7 defines the function of each bit of the EFER register.
The EFER register is MSR C000_0080h.
Figure 2. Extended Feature Enable Register (EFER)—MSR C000_0080h (Models 6, 7, and 8/[7:0])
1
0
63
S
C
E
Reserved
Description
System Call Extension
Symbol
SCE
Bit
0
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