Intel BFCBASE Data Sheet - Page 133
RES6: Reserved 6, Processor Serial/Electronic Signature
UPC - 735858197373
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Features 7.4.3.6.2 Offset: 38h-3Eh Bit 7:0 Character 7 ASCII character or 20h 15:8 00h-0FFh: ASCII character Character 6 ASCII character or 20h 23:16 00h-0FFh: ASCII character Character 5 ASCII character or 20h 31:24 00h-0FFh: ASCII character Character 4 ASCII character 39:32 00h-0FFh: ASCII character Character 3 ASCII character 47:40 00h-0FFh: ASCII character Character 2 ASCII character 4F:48 00h-0FFh: ASCII character Character 1 ASCII character 00h-0FFh: ASCII character Description RES6: Reserved 6 This location is reserved. Writes to this register have no effect. 7.4.3.6.3 Offset: 3Fh-4Ch Bit 111:0 RESERVED 6 Description 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. Offset: 4Dh=54h Bit 63:0 Description Processor Serial/Electronic Signature 00000000h-FFFFFFFFh: Electronic Signature Document Number: 318080-002 133