Datasheet

Features
128 Intel® Xeon® Processor 7400 Series Datasheet
7.4.3.6.2 RES6: Reserved 6
This location is reserved. Writes to this register have no effect.
7.4.3.6.3 PS/ESIG: Processor Serial/Electronic Signature
This location contains a 64-bit identification number. The value in this field is either a
serial signature or an electronic signature. Bits 5 & 6 of the Processor Feature Flags
(Offset 78h) indicates which signature is present. Intel does not guarantee that each
processor will have a unique value in this field. Writes to this register have no effect.
7.4.3.6.4 RES7: Reserved 7
This location is reserved. Writes to this register have no effect.
23:16 Character 3
ASCII character
00h-0FFh: ASCII character
15:8 Character 2
ASCII character
00h-0FFh: ASCII character
7:0 Character 1
ASCII character
00h-0FFh: ASCII character
Offset: 38h-3Eh
Bit Description
Offset: 3Fh-4Ch
Bit Description
111:0 RESERVED 6
Offset: 4Dh=54h
Bit Description
63:0 Processor Serial/Electronic Signature
00000000h-FFFFFFFFh: Electronic Signature
Offset: 55h-6Eh
Bit Description
207:0 RESERVED 7