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9-40 Vol. 3
PROCESSOR MANAGEMENT AND INITIALIZATION
Table 9-7. Microcode Update Format
31 24 16 8 0 Bytes
Header Version 0
Update Revision 4
Month: 8 Day: 8 Year: 16 8
Processor Signature (CPUID) 12
Res: 4
Extended
Family: 8
Extended
Mode: 4
Reserved: 2
Type: 2
Family: 4
Model: 4
Stepping: 4
Checksum 16
Loader Revision 20
Processor Flags 24
Reserved (24 bits)
P7
P6
P5
P4
P3
P2
P1
P0
Data Size 28
Total Size 32
Reserved (12 Bytes) 36
Update Data (Data Size bytes, or 2000 Bytes if Data Size = 00000000H) 48
Extended Signature Count ‘n’ Data Size
+ 48
Extended Processor Signature Table Checksum Data Size
+ 52
Reserved (12 Bytes)
Data Size
+ 56
Processor Signature[n] Data Size
+ 68 +
(n * 12)
Processor Flags[n] Data Size
+ 72 +
(n * 12)
Checksum[n] Data Size
+ 76 +
(n * 12)