Datasheet

Processor Integrated I/O (IIO) Configuration Registers
42 Datasheet, Volume 2
3.3.3.10 SVID—Subsystem Vendor ID
This register identifies the vendor of the subsystem. This 16-bit register combined with
the Device Identification Register uniquely identify any PCI device.
3.3.3.11 SID—Subsystem Identity
This register identifies the particular subsystem.
3.3.3.12 CAPPTR—Capability Pointer
The CAPPTR provides the offset to the location of the first device capability in the
capability list.
3.3.3.13 INTLIN—Interrupt Line Register
The Interrupt Line register is used to communicate interrupt line routing information
between initialization code and the device driver
. The device itself does not use this
value. OS and device drivers use this to determine priority and vector information.
Register: SVID
Device: 0 (DMI)
Function: 0
Offset: 2Ch
Bit Attr Default Description
15:0 RWO 8086h
Subsystem Vendor Identification
This field is programmed during boot-up to indicate the vendor of the
system board. After it has been written once, it becomes read only.
Register: SID
Device: 0 (DMI)
Function: 0
Offset: 2Eh
Bit Attr Default Description
15:0 RWO 00h
Subsystem Identification Number
Assigned by the subsystem vendor to uniquely identify the subsystem.
Register: CAPPTR
Device: 0 (DMI), 3,5 (PCIe)
Function: 0
Offset: 34h
Bit Attr Default Description
7:0 RWO 40h
Capability Pointer
Points to the first capability structure for the device.
Register: INTLIN
Device: 0 (DMI), 3,5 (PCIe)
Function: 0
Offset: 3Ch
Bit Attr Default Description
7:0 RW 00h
Interrupt Line
This bit is RW for devices that can generate a legacy INTx message and
is needed only for compatibility purposes.