
82815 GMCH
R
50
Datasheet
3.4.11.
SVID—Subsystem Vendor Identification Register (Device 0)
Address Offset:
2C–2Dh
Default:
0000h
Access:
Read/Write-Once
Size:
16 bits
Bit
Description
15:0
Subsystem Vendor ID—R/WO.
This value is used to identify the vendor of the subsystem. The default
value is 0000h. This field should be programmed by BIOS during boot-up. Once written, this register
becomes read-only. This Register can only be cleared by a Reset.
3.4.12.
SID—Subsystem Identification Register (Device 0)
Address Offset:
2E–2Fh
Default:
0000h
Access:
Read/Write-Once
Size:
16 bits
Bit
Description
15:0
Subsystem ID—R/WO.
This value is used to identify a particular subsystem. The default value is
0000h. This field should be programmed by BIOS during boot-up. Once written, this register becomes
read-only. This Register can only be cleared by a Reset.
3.4.13.
CAPPTR—Capabilities Pointer (Device 0)
Address Offset:
Default Value:
Access:
Size:
34h
88h
Read-Only
8 bits
The CAPPTR provides the offset that is the pointer to the location where the capability identification
register is located.
Bit
Description
7:0
Pointer to Start of CAPPTR Linked List.
88h
= Points to the CAPID register that provides capability information regarding the GMCH. The
capabilities are determined by which fuses are blown.