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Processor Models and Steppings
3
23913A/0—November 2000
Embedded AMD-K6™ Processors BIOS Design Guide
Preliminary Information
AMD-K6™E Embedded Processor
Model 7
Model 7 is the first processor manufactured in the 0.25-micron
process.
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Model 7 supports six model-specific registers (MSRs).
AMD-K6™-2 Processor
Some important features supported by the AMD-K6-2 processor
include the 3DNow!™ instruction set and a 100-MHz processor
bus.
Model 8/[7:0]
Model 8/[7:0] is any of eight possible model/steppings—models
8 / 0 , 8 / 1 , 8 / 2 , 8 / 3 , 8 / 4 , 8 / 5 , 8 / 6 , o r 8 / 7 . M o d e l 8 / [ 7 : 0 ] i s
manufactured in the 0.25-micron process and was the original
version of the AMD-K6-2 available as a desktop product.
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Model 8/[7:0] implements the same six MSRs as the Model 7,
and the bits and fields within these six MSRs are defined
identically.
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Model 8/[7:0] also implements the SYSCALL/SYSRET
Target Address Register (STAR) MSR for a total of seven
MSRs.
Model 8/[F:8]
Model 8/[F:8] is any of eight possible model/steppings—models
8/8, 8/9, 8/A, 8/B, 8/C, 8/D, 8/E, or 8/F. Model 8/[F:8] is
manufactured in the 0.25-micron process.
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Model 8/[F:8] implements the same six MSRs as the models
7 and 8/[7:0], but the bits and fields within two of these
MSRs—WHCR and EFER—are not defined identically.
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Also, Model 8/[F:8] supports the STAR MSR and three
additional MSRs, for a total of ten MSRs.