82845G Datasheet, PDF (56/193 Pages) Intel Corporation – Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH)

Register Description
3.5.1.11
SVID—Subsystem Vendor Identification Register (Device 0)
Address Offset:
Default Value:
Access:
Size:
2C–2Dh
0000h
R/W-Once
16 bits
This value is used to identify the vendor of the subsystem.
3.5.1.12
Bit
Description
15:0
Subsystem Vendor ID (SUBVID)—R/WO. 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.
SID—Subsystem Identification Register (Device 0)
Address Offset:
Default Value:
Access:
Size:
2E–2Fh
0000h
R/W-Once
16 bits
This value is used to identify a particular subsystem.
Bit
15:0
Description
Subsystem ID (SUBID)—R/WO. This field should be programmed during BIOS initialization. After it
has been written once, it becomes read only.
3.5.1.13
CAPPTR—Capabilities Pointer Register (Device 0)
Address Offset:
Default Value:
Access:
Size:
34h
E4h
RO
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
Pointer Address. This field provides an address that is the offset of the first capability ID register
7:0 block. For the GMCH, the first capability is the Product-Specific Capability that is located at offset
E4h.
56
Intel^® 82845G/82845GL/82845GV GMCH Datasheet