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Register Description
R
Intel
®
82845 MCH for SDR Datasheet 51
3.5.11 SVID—Subsystem Vendor Identification (Device 0)
Offset: 2C–2Dh
Default: 0000h
Access: R/WO
Size: 16 bits
This value is used to identify the vendor of the subsystem.
Bit Description
15:0 Subsystem Vendor ID. (Default = 0000h). This field should be programmed during boot-up.
After this field is written once, it becomes read only.
3.5.12 SID—Subsystem Identification (Device 0)
Offset: 2E–2Fh
Default: 0000h
Access: R/WO
Size: 16 bits
This value is used to identify a particular subsystem.
Bit Description
15:0 Subsystem ID. (Default = 0000h). This field should be programmed during boot-up. After this
field is written once, it becomes read only.
3.5.13 CAPPTR—Capabilities Pointer (Device 0)
Offset: 34h
Default: E4h
Access: RO
Size: 8 bits
The CAPPTR provides the offset that is the pointer to the location where the AGP standard
registers are located.
Bit Description
7:0 AGP Standard Register Block Pointer Address. This address pointer indicates to software
where it can find the beginning of the AGP register block.
E4h = AGP register block beginning address.