Intel 9560 CM8063101049716 Data Sheet
Product codes
CM8063101049716
Intel
®
Itanium
®
Processor 9300 Series and 9500 Series Datasheet
157
System Management Bus Interface
Itanium
®
Processor 9500 Series. Note that even reduced core count Itanium products
(for example, 2-core Intel
®
Itanium
®
Processor 9300 Series) will still have all devices
on the TAP chain.
6.4.10
Other Data
Addresses 7Dh-7Fh are listed as reserved.
6.4.11
Checksums
includes the checksum values for each section defined in the 128 byte PIROM section,
except the Other Data section.
except the Other Data section.
Checksums are automatically calculated and programmed. The first step in calculating
the checksum is to add each byte from the field to the next subsequent byte. The
second step is to take the 2’s complement of the first step. This value is the checksum.
the checksum is to add each byte from the field to the next subsequent byte. The
second step is to take the 2’s complement of the first step. This value is the checksum.
Example: For a byte string of AA445Ch, the resulting checksum will be B6h.
AA = 10101010
44 = 01000100
5C = 0101100
First step: add the bytes.
AA + 44 + 5C = 01001010
AA + 44 + 5C = 01001010
Second step: take 2’s complement.
10110101 +1 = 10110110
10110101 +1 = 10110110
Checksum is 0xB6.
§
Table 6-5.
128 Byte PIROM Checksum Values
Section
Checksum Address
General
0Eh
Processor Data
21h
Processor Core Data
2Dh
Processor Uncore Data
45h
Cache Data
4Eh
Package Data
55h
Part Number Data
6Ah
Thermal Reference Data
71h
Feature Data
7Ch
Other Data
None Defined