Model 7 And Model 8/[7:0] Registers; Model-Specific Registers Supported By Models 7 And - AMD -K6-2/450 - MHz Processor Application Note

23913A/0—November 2000

Model 7 and Model 8/[7:0] Registers

Table 9.

Model-Specific Registers Supported by Models 7 and 8/[7:0]

Register Name
Machine-Check Address Register
Machine-Check Type Register
Test Register 12
Time Stamp Counter
Extended Feature Enable Register
Write Handling Control Register
SYSCALL/SYSRET Target Address Register STAR
Model 7 and Model 8/[7:0] Registers
Preliminary Information
The AMD-K6E processor Model 7 and the AMD-K6-2 processor
Model 8/[7:0] provide the model-specific registers listed in
Table 9.
The contents of ECX selects the MSR to be addressed by the
RDMSR and WRMSR instruction.
Mnemonic ECX Value
MCAR 00h
MCTR 01h
TR12 0Eh
TSC 10h
EFER C000_0080h page 18
WHCR C000_0082h page 19
C000_0081h
Embedded AMD-K6™ Processors BIOS Design Guide
Description Comments
page 16 Identical on all models
page 16 Identical on all models
page 16 Identical on all models
page 16 Identical on all models
page 22 Not supported on Model 7
17