參數(shù)資料
型號(hào)： 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(jì)應(yīng)用指南的AMD - K6處理器的BIOS設(shè)計(jì)中的應(yīng)用說(shuō)明
文件頁(yè)數(shù)： 19/52頁(yè)
文件大?。?/td> 687K
代理商： 21329
CPUID Identification Algorithms
9
21329L/0—December 1999
AMD-K6
Processor BIOS Design
CPUID Identification Algorithms
The CPUID instruction provides information about the
processor (vendor, type, name, etc.) and its capabilities
(features). After detecting the processor and its capabilities,
software can be accurately tuned to the system for maximum
performance and benefit to users. For example, game software
can test the performance level available from a particular
processor by detecting the type of processor. If the performance
level is high enough, the software can enable additional
capabilities or more advanced algorithms. Another example
involves testing if the processor supports 3DNow! instructions.
If the software finds this functionality present when it checks
the feature bits, it can utilize these more powerful extensions
for better performance on new multimedia software.
For more detailed information, refer to the
AMD Processor
Recognition Application Note
, order# 20734.
Table 4 on page 10 shows the recommended BIOS boot strings
for the AMD-K6 processor. The recommended boot strings are:
I
AMD-K6(tm)/XXX
for Models 6 and 7
AMD-K6(tm)-2/XXX
for Model 8 (all steppings)
AMD-K6(tm)-III/XXX
for Model 9
I
I
The value for XXX is determined by calculating the core
frequency of the processor. Use the Time Stamp Counter (TSC)
to ‘clock’ a timed operation and compare the result to the Real
Time Clock (RTC) to determine the operating frequency.
In addition to displaying the recommended boot string, BIOS
code that normally indicates the presence of a L2 cache within
the Summary/Configuration screen should change all
occurrences of “L2” to “External.”
Note:
Table 4 contains information intended to prepare the
infrastructure for potential future products. These products
at these speed grades may or may not be announced, but
BIOS software should be prepared to support these options.
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