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Intel
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82575EB Gigabit Ethernet Controller — Hardware Accessed Words
Intel
®
82575EB Gigabit Ethernet Controller 324632-003
Software Developer’s Manual and EEPROM Guide Revision: 2.1
54 January 2011
4.5.1 Hardware Accessed Words
This section describes the EEPROM words that are loaded by the 82575 hardware. Most of these bits
are located in configuration registers. The words are only read and used if the signature field in the
EEPROM Sizing & Protected Fields (word 12h) is valid.
Note: When changing the default value of a reserved bit, 82575 behavior is undefined.
The following table lists the auto-load sequence.
39h PXE onfiguration Customization Options PCI Function 2 (Word 39h)
3Ah PXE CSetup Options PCI Function 3 (Word 3Ah)
3Bh PXE Configuration Customization Options PCI Function 3 (Word 3Bh)
3Dh iSCSI SCSI Boot Configuration Offset (Word 3Dh)
3Fh PXE Checksum Word (Word 3Fh)
40h:
4Fh
HW Reserved
50h:
53h
FW Common Firmware Pointers MNG
54h FW MNG Capabilities MNG
55h:
5Ah
FW PT Pointers MNG
5Bh:
. . .
FW Firmware Structure MNG
1. This column specifies whether this byte is used by hardware (HW), software (SW) or firmware (FW). EEPROM words can also be
used by Preboot eXecution Environment (PXE) code.
Table 4. 82575 EEPROM Map
Word
Used
By
1
High Byte (15:8) Low Byte (7:0)
Image
Value
LAN 0/1