Intel 8 LAN manual prompt message appears, if enabled by DIM

ICH8—NVM Information Guide

Bit		Name		Description
			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.
5	Reserved		Reserved
			Default Boot Selection. These bits select which device is the default
			boot device. These bits are only used if the agent detects that the BIOS
			does not support boot order selection or if the MODE field of word 31h
4:3	DBS		is set to MODE_LEGACY.
			00b = Network boot, then local boot
			01b	= Local boot, then network boot
			10b	= Network boot only
			11b	= Local boot only
2	Reserved		Reserved
			Protocol Select. These bits select the boot protocol.
1:0	PS		00b	= PXE (default value)
			01b	= RPL protocol
			Other values are undefined.

1.4.23.2Boot Agent Configuration Customization Options (Word 31h)

Word 31h contains settings that can be programmed by an OEM or network administrator to customize the operation of the software. These settings cannot be changed from within the Control-S setup menu or the IBA Intel Boot Agent utility. The lower byte contains settings that would typically be configured by a network administrator using the Intel Boot Agent utility; these settings generally control which setup menu options are changeable. The upper byte are generally settings that would be used by an OEM to control the operation of the agent in a LOM environment, although there is nothing in the agent to prevent their use on a NIC implementation.

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