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35-284 Vol. 3C

MODEL-SPECIFIC REGISTERS (MSRS)

190H

400

MSR_MCG_R8

0, 1, 2, 3, 

4, 6

Unique

Machine Check R8
See Section 15.3.2.6, “IA32_MCG Extended 

Machine Check State MSRs.”

63:0

Registers R8-15 (and the associated state-save 

MSRs) exist only in Intel 64 processors. These 

registers contain valid information only when the 

processor is operating in 64-bit mode at the time 

of the error.

191H

401

MSR_MCG_R9

0, 1, 2, 3, 

4, 6

Unique

Machine Check R9D/R9
See Section 15.3.2.6, “IA32_MCG Extended 

Machine Check State MSRs.”

63:0

Registers R8-15 (and the associated state-save 

MSRs) exist only in Intel 64 processors. These 

registers contain valid information only when the 

processor is operating in 64-bit mode at the time 

of the error.

192H

402

MSR_MCG_R10

0, 1, 2, 3, 

4, 6

Unique

Machine Check R10
See Section 15.3.2.6, “IA32_MCG Extended 

Machine Check State MSRs.”

63:0

Registers R8-15 (and the associated state-save 

MSRs) exist only in Intel 64 processors. These 

registers contain valid information only when the 

processor is operating in 64-bit mode at the time 

of the error.

193H

403

MSR_MCG_R11

0, 1, 2, 3, 

4, 6

Unique

Machine Check R11
See Section 15.3.2.6, “IA32_MCG Extended 

Machine Check State MSRs.”

63:0

Registers R8-15 (and the associated state-save 

MSRs) exist only in Intel 64 processors. These 

registers contain valid information only when the 

processor is operating in 64-bit mode at the time 

of the error.

194H

404

MSR_MCG_R12

0, 1, 2, 3, 

4, 6

Unique

Machine Check R12
See Section 15.3.2.6, “IA32_MCG Extended 

Machine Check State MSRs.”

63:0

Registers R8-15 (and the associated state-save 

MSRs) exist only in Intel 64 processors. These 

registers contain valid information only when the 

processor is operating in 64-bit mode at the time 

of the error.

195H

405

MSR_MCG_R13

0, 1, 2, 3, 

4, 6

Unique

Machine Check R13
See Section 15.3.2.6, “IA32_MCG Extended 

Machine Check State MSRs.”

Table 35-41.  MSRs in the Pentium® 4 and Intel® Xeon® Processors  (Contd.)

Register 

Address

Register Name

Fields and Flags

Model 

Avail-

ability

Shared/

Unique

1

Bit Description

 Hex

Dec