Datasheet

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