Intel AT80604004881AA User Manual
Features
158
Intel® Xeon® Processor 7500 Datasheet, Volume 1
7.5.2.6
PDCKS: Processor Data Checksum
This location provides the checksum of the Processor Data Section. Writes to this
register have no effect.
register have no effect.
7.5.3
Processor Core Data
This section contains silicon-related data relevant to the processor cores.
7.5.3.1
CPUID: CPUID
This location contains the CPUID, Processor Type, Family, Model and Stepping. The
CPUID field is a copy of the results in EAX[15:0] from Function 1 of the CPUID
instruction. Writes to this register have no effect. Data format is hexidecimal.
CPUID field is a copy of the results in EAX[15:0] from Function 1 of the CPUID
instruction. Writes to this register have no effect. Data format is hexidecimal.
Offset:
18h-19h
Bit
Description
15:0
RESERVED
0000h-FFFFh: Reserved
Offset:
1Ah
Bit
Description
7:0
Processor Data Checksum
One-byte checksum of the Processor Data Section
00h- FFh: See
for calculation of this value.
Offset:
1Bh-1Ch
Bit
Description
15:13
Reserved
00b-11b: Reserved
12:12
Processor Type
0b-1b: Processor Type
11:8
Processor Family
0h-Fh: Processor Family
7:4
Processor Model
0h-Fh: Processor Model
3:0
Processor Stepping
0h-Fh: Processor Stepping