82845G Datasheet, PDF (82/193 Pages) Intel Corporation – Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH)

Register Description
3.5.2.5
3.5.2.6
3.5.2.7
RID1—Revision Identification Register (Device 1)
Address Offset:
Default Value:
Access:
Size:
08h
see table below
RO
8 bits
This register contains the revision number of the GMCH Device 1.
Bit
Description
Revision Identification Number (RID). This is an 8-bit value that indicates the revision identification
number for the GMCH Device 1.
82845G and 82845GL GMCH
7:0
01h = A1 Stepping
03h = B1 Stepping
82845GV GMCH
01h = A1 Stepping
SUBC1—Sub-Class Code Register (Device 1)
Address Offset:
Default Value:
Access:
Size:
0Ah
04h
RO
8 bits
This register contains the Sub-Class Code for the GMCH Device 1.
Bit
Description
Sub-Class Code (SUBC). This is an 8-bit value that indicates the category of Bridge into which the
7:0 ^{Device 1 of the GMCH falls.}
04h = PCI-to-PCI bridge.
BCC1—Base Class Code Register (Device 1)
Address Offset:
Default Value:
Access:
Size:
0Bh
06h
RO
8 bits
This register contains the Base Class Code of the GMCH Device 1.
Bit
Description
Base Class Code (BASEC). This is an 8-bit value that indicates the Base Class Code for the GMCH
7:0 ^{Device 1.}
06h = Bridge device.
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Intel^® 82845G/82845GL/82845GV GMCH Datasheet