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9
ICH8—NVM Information Guide
Notes:
1. SW = Software: This is access from the network configuration tools and drivers.
2. PXE = PXE Boot Agent: This is access from the PXE Option ROM code in BIOS.
3. HW-Shared = Hardware - Shared: This is read on when the Shared Configuration is reset.
4. HW-PCI = Hardware - PCI: This is read when the PCI Configuration is reset.
1.4.1 Ethernet Individual Address (Words 00h - 02h)
The Ethernet Individual Address (IA) is a six-byte field that must be unique for each
adapter card or LOM and unique for each copy of the NVM image. The first three bytes
are vendor specific. (For example, these bytes equal 00 AA 00 or 00 A0 C9 for Intel
products.) The last three bytes must be unique for each copy of the NVM. OEM versions
of the product might be required to have non-Intel ID’s in the first three byte positions.
The value from this field is loaded into the Receive Address Register 0 (RAL0/RAH0).
The Intel default is listed in Table 2.
Note: The Ethernet IA is byte swapped, as listed in Table 2.
The IA bytes read from the NVM are used by the ICH8 until an IA Setup command is
issued by software. The IA defined by the IA Setup command overrides the IA read
from the NVM.
1.4.2 Reserved (Word 03h)
1Bh to
2Fh
32h to
5Eh
Reserved
30h to
3Eh
60h to
7Ch
PXE Software Region PXE
3Fh 7Eh Software Checksum (bytes 00h through 7Dh) SW
LAN
Word
Offset
NVM
Byte
Offset
HIgh Byte (Bits 15:8) Low Byte (Bits 7:0) Used By
Image
Value
Table 2. Ethernet Individual Address (Words 00h - 02h)
Individual Address Byte
Word 00 Word 01 Word 02
Manufacturer MAC Address
Byte
2
Byte
1
Byte
4
Byte
3
Byte
6
Byte
5
Intel (original) 00AA00XXYYZZh AAh 00h XXh 00h ZZh YYh
Intel (new) 00A0C9XXYYZZh A0h 00h XXh C9h ZZh YYh
Table 3. Reserved (Word 03h)
Bit Name Default Description
15:12 Reserved 0000b These bits are reserved and should be set to 0000b.
11 IBA LOM 1b Must be set to 1b for Intel Boot Agent (IBA) to function correctly.
10:0 Reserved 0h These bits are reserved and should be set to 0h.