EEPROM Interface

Table 5-15. Boot Agent Main Setup Options

Bit

Name

Description

 

 

 

 

 

PXE Presence.

 

 

Setting this bit to 0b Indicates that the image in the FLASH contains a

 

 

PXE image.

15

PPB

Setting this bit to 1b indicates that no PXE image is contained.

The default for this bit is 0b in order to be backwards compatible with

 

 

existing systems already in the field.

 

 

If this bit is set to 0b, EEPROM word 32h (PXE Version) is valid. When

 

 

EPB is set to 1b and this bit is set to 0b, indicates that both images are

 

 

present in the FLASH.

 

 

 

 

 

EFI Presence.

 

 

Setting this bit to 1b Indicates that the image in the FLASH contains an

 

 

EFI image.

14

EPB

Setting this bit to 0b indicates that no EFI image is contained.

The default for this bit is 0b in order to be backwards compatible with

 

 

existing systems already in the field.

 

 

If this bit is set to 1b, EEPROM word 33h (EFI Version) is valid. When

 

 

PPB is set to 0b and this bit is set to 1b, indicates that both images

 

 

(PXE and EFI) are present in the FLASH.

 

 

 

13

Reserved

Reserved for future use. Set this bit to 0b.

 

 

 

 

 

Force Full Duplex.

12

FDP

Set this bit to 0b for half duplex; set to 1b for full duplex.

 

 

Note that this bit is a don’t care unless bits 10 and 11 are set.

 

 

 

 

 

These bits determine speed. 01b = 10 Mbs, 10b = 100 Mbs, 11b = Not

11:10

FSP

allowed.

All zeros indicate Auto-negotiate (the current bit state).

 

 

 

 

Note that bit 12 is a don’t care unless these bits are set.

 

 

 

9

Reserved

Reserved for future use. Set this bit to 0b.

 

 

 

 

 

Display Setup Message.

8

DSM

If this bit is set to 1b, the "Press Control-S" message appears after the

title message.

 

 

 

 

The default for this bit is 1b.

 

 

 

 

 

Prompt Time. These bits control how long the "Press Control-S" setup

 

 

prompt message appears, if enabled by DIM.

 

 

00b = 2 seconds (default)

7:6

PT

01b = 3 seconds

10b = 5 seconds

 

 

 

 

11b = 0 seconds

 

 

Note that the Ctrl-S message does not appear if 0 seconds prompt time

 

 

is selected.

 

 

 

 

 

Local Boot Selection (OBSOLETE). In previous versions of the agent,

5

LBS

this bit enables or disables local boot, if the DBS bit selects it.

The default for this bit is 1b; enable local booting. The boot agent, at

 

 

 

 

runtime, no longer uses this bit.

 

 

 

Software Developer’s Manual

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Intel Intel Gigabit Ethernet Controllers, PCI-X manual Boot Agent Main Setup Options