Intel 8 LAN manual 1.4.23PXE Words Words 30h - 3Eh, 1.4.23.1Boot Agent Main Setup Options Word 30h

NVM Information Guide—ICH8

1.4.23PXE Words (Words 30h - 3Eh)

Words 30h through 3Eh (bytes 60h through 7Dh) have been reserved for configuration and version values to be used by PXE code.

1.4.23.1Boot Agent Main Setup Options (Word 30h)

The boot agent software configuration is controlled by the NVM with the main setup options stored in word 30h. These options are those that can be changed by using the Control-S setup menu or by using the IBA Intel Boot Agent utility. Note that these settings only apply to Boot Agent software.

Table 18. 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 for backwards compatibility 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 for backwards compatibility 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. This bit must be set to 0b.
		Force Full Duplex.
12	FDP	Set this bit to 0b for half duplex and 1b for full duplex.
		Note that this bit is a don’t care unless bits 10 and 11 are set.
		Force Speed.
		These bits determine speed.
		01b = 10 Mb/s
11:10	FSP	10b = 100 Mb/s
		11b = Not 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
		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.

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