82845G Datasheet, PDF (53/193 Pages) Intel Corporation – Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH)

Register Description
3.5.1.5
3.5.1.6
3.5.1.7
RID—Revision Identification Register (Device 0)
Address Offset:
Default Value:
Access:
Size:
08h
See table below
RO
8 bits
This register contains the revision number of the GMCH Device 0.
Bit
Description
Revision Identification Number (RID). This is an 8-bit value that indicates the revision identification
number for the GMCH Device 0.
82845G and 82845GL GMCH
7:0
01h = A1 Stepping
03h = B1 Stepping
82845GV GMCH
01h = A1 Stepping
SUBC—Sub-Class Code Register (Device 0)
Address Offset:
Default Value:
Access:
Size:
0Ah
00h
RO
8 bits
This register contains the Sub-Class Code for the GMCH Device 0.
Bit
Description
Sub-Class Code (SUBC). This is an 8-bit value that indicates the category of Bridge into which the
7:0 ^{GMCH falls.}
00h = Host Bridge.
BCC—Base Class Code Register (Device 0)
Address Offset:
Default Value:
Access:
Size:
0Bh
06h
RO
8 bits
This register contains the Base Class Code of the GMCH Device 0.
Bit
Description
Base Class Code (BASEC). This is an 8-bit value that indicates the Base Class Code for the
7:0 ^GMCH.
06h = Bridge device.
Intel^® 82845G/82845GL/82845GV GMCH Datasheet
53