AMD-K6 AMD [Advanced Micro Devices], AMD-K6 Datasheet - Page 55

• Manufacturer Part Number: AMD-K6
• Description: AMD-K6 Processor
• Manufacturer: AMD [Advanced Micro Devices]

20695H/0—March 1998
Model-Specific
Registers (MSR)
Figure 28. Machine-Check Address Register (MCAR)
Chapter 3
63
The AMD-K6 processor provides five MSRs. The value in the
ECX register selects the MSR to be addressed by the RDMSR
and WRMSR instructions. The values in EAX and EDX are used
as inputs and outputs by the RDMSR and WRMSR instructions.
Table 5 lists the MSRs and the corresponding value of the ECX
register. Figures 28 through 32 show the MSR formats.
Table 5.
For mo re info rma tio n abo ut the RD MSR and WRMSR
instructions, see the AMD K86™ Family BIOS and Software Tools
Development Guide, order# 21062.
MCAR and MCTR. The AMD-K6 processor does not support the
generation of a machine check exception. However, the
processor does provide a 64-bit Machine Check Address
Register (MCAR), a 64-bit Machine Check Type Register
(MCTR), and a Machine Check Enable (MCE) bit in CR4.
Because the processor does not support machine check
exceptions, the contents of the MCAR and MCTR are only
affected by the WRMSR instruction and by RESET being
sampled asserted (where all bits in each register are reset to 0).
Machine Check Address Register (MCAR)
Machine Check Type Register (MCTR)
Test Register 12 (TR12)
Time Stamp Counter (TSC)
Write Handling Control Register (WHCR)
Model-Specific Register
Model-Specific Registers (MSRs)
Software Environment
MCAR
Value of ECX
C000_0082h
00h
01h
0Eh
10h
AMD-K6
®
Processor Data Sheet
0
37