Datasheet

Register Description
R
Datasheet 79
3.7.10 SVID – Subsystem Vendor Identification Register (Device
#0)
Address Offset: 2C-2Dh
Default Value: 0000h
Access: Read/Write Once
Size: 16 bits
This value is used to identify the vendor of the subsystem.
Bit Description
15:0 Subsystem Vendor ID (SUBVID): This field should be programmed during boot-up to
indicate the vendor of the system board. After it has been written once, it becomes Read
Only.
3.7.11 SID – Subsystem Identification Register (Device #0)
Address Offset: 2E-2Fh
Default Value: 0000h
Access: Read/Write Once
Size: 16 bits
This value is used to identify a particular subsystem.
Bit Description
15:0 Subsystem ID (SUBID): This field should be programmed during BIOS initialization.
After it has been written once, it becomes Read Only.
3.7.12 CAPPTR – Capabilities Pointer Register (Device #0)
Address Offset: 34h
Default Value: 40h
Access: Read Only
Size: 8 bits
The CAPPTR provides the offset that is the pointer to the location of the first device capability in
the capability list.
Bit Description
7:0 Pointer to the offset of the first capability ID register block: In this case the first
capability is the Product-Specific Capability, which is located at offset 40h.