82583V Datasheet, PDF (79/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

Non-Volatile Memory (NVM) Map—82583V GbE Controller
5.1.2.9
iSCSI Boot Configuration Start Address (Word 0x3D)
Bit
Name
15:0
Address
Hardware
Default
NVM
Image
Setting
0x0
0x120
Description
NVM word address of the iSCSI boot configuration
structure starting point.
5.1.2.10
Note:
Checksum Word Calculation (Word 0x3F)
The checksum word (0x3F) is used to ensure that the base NVM image is a valid image.
The value of this word should be calculated such that after adding all the words (0x00-
0x3F), including the checksum word itself, the sum should be 0xBABA. The initial value
in the 16-bit summing register should be 0x0000 and the carry bit should be ignored
after each addition.
Hardware does not calculate the word 0x3F checksum during an NVM write or read. It
must be calculated by software independently and included in the NVM write data. This
field is provided strictly for software verification of NVM validity. All hardware
configuration based on word 0x00-0x3F content is based on the validity of the
Signature field of the NVM.
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