Datasheet

Features
Dual-Core Intel
®
Xeon
®
Processor 7000 Series Datasheet 95
Checksums are automatically calculated and programmed by Intel. The first step in calculating the
checksum is to add each byte from the field to the next subsequent byte. This result is then negated
to provide the checksum.
Example: For a byte string of AA445Ch, the resulting checksum will be B6h.
AA = 10101010 44 = 01000100 5C = 0101100
AA + 44 + 5C = 01001010
Negate the sum: 10110101 +1 = 101101 (B6h)
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Table 7-22. 128 Byte ROM Checksum Values
Section Checksum Address
Header 0Dh
Processor Data 15h
Processor Core Data 24h
Cache Data 31h
Package Data 37h
Part Number Data 6Fh
Thermal Reference Data 73h
Feature Data 7Fh
Other Data None Defined