Intel 8 LAN manual 1.4.8PCI Initialization Control Word 0Ah, 1.4.9Subsystem ID Word 0Bh

ICH8—NVM Information Guide

1.4.8PCI Initialization Control (Word 0Ah)

This word contains initialization values that:

•Set defaults for some internal registers.

•Enable/disable specific features.

•Determine which PCI configuration space values are loaded from the NVM.

Table 8.	PCI Initialization Control Word (Word 0Ah)
	Bit	Name	Default		Description
	15:13	Reserved	000b	This field is reserved and should be set to 000b.
	12	Reserved	1b	This field is reserved and should be set to 1b.
	11:8	Reserved	0000b	These bits are reserved and should be set to 0000b.
				This bit is used as an auxiliary power indication. It is used in
				conjunction with the PM Enable bit.
	7	AUX PWR	1b	0b	= D3cold wake-up is not advertised.
				1b	= D3cold wake-up is advertised in the PMC register of the PCI
				function if the PM Enable bit is also set.
				This bit enables the assertion of a PME in the PCI function at any
				power state.
	6	PM-Ena	1b	0b	= PME functionality is disabled.
				1b	= PME functionality is enabled.
				This bit affects the advertised PME_Support indication in the PMC
				register of the PCI function.
	5:3	Reserved	00b	This bit is reserved and should be set to 00b.
				When APM Enable is set, both the PHY (82566 or 82562V) and
				the MAC should be initialized to a functional state following power
	2	APM Enable	1b	up.
				0b	= APM functionality is disabled.
				1b	= APM functionality is enabled.
				Note: This is a reserved bit for the ICH8 (B1 stepping).
				0b	= Device loads the default PCI Subsystem ID and Subsystem
	1	Load Subsystem IDs	1b	Vendor ID.
				1b	= Device loads its PCIe* Subsystem ID and Subsystem Vendor
				ID from the NVM (words 0Bh and 0Ch).
		Load Vendor/Device		0b	= Device loads the default PCI Vendor and Device IDs.
	0		1b	1b = Device loads the default values for PCI Vendor and Device IDs
		IDs
				from the NVM (words 0Dh and 0Eh).

1.4.9Subsystem ID (Word 0Bh)

If Load Subsystem IDs bit of word 0Ah is set to 1b, this word is read in to initialize the Subsystem ID. The Subsystem ID default value is 0000h.

1.4.10Subsystem Vendor ID (Word 0Ch)

If Load Subsystem IDs bit of word 0Ah is set to 1b, this word is read in to initialize the Subsystem Vendor ID. The Subsystem Vendor ID default value is 8086h.

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