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ICH8—NVM Information Guide
1.4.8 PCI 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.
1.4.9 Subsystem 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.
1.4.10 Subsystem 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.
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.
7AUX PWR 1b
This bit is used as an auxiliary power indication. It is used in
conjunction with the PM Enable bit.
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.
6PM-Ena 1b
This bit enables the assertion of a PME in the PCI function at any
power state.
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.
2APM Enable 1b
When APM Enable is set, both the PHY (82566 or 82562V) and
the MAC should be initialized to a functional state following power
up.
0b = APM functionality is disabled.
1b = APM functionality is enabled.
Note: This is a reserved bit for the ICH8 (B1 stepping).
1 Load Subsystem IDs 1b
0b = Device loads the default PCI Subsystem ID and Subsystem
Vendor ID.
1b = Device loads its PCIe* Subsystem ID and Subsystem Vendor
ID from the NVM (words 0Bh and 0Ch).
0
Load Vendor/Device
IDs
1b
0b = Device loads the default PCI Vendor and Device IDs.
1b = Device loads the default values for PCI Vendor and Device IDs
from the NVM (words 0Dh and 0Eh).