
82815 GMCH
R
88
Datasheet
3.5.5.
RID1—Revision Identification Register (Device 1)
Address Offset:
Default Value:
Access:
Size:
08h
02h (see Spec. Update document for latest information.)
Read-Only
8 bits
This register contains the revision number of the GMCH Device 1. These bits are read-only and writes to
this register have no effect.
Bit
Description
7:0
Revision Identification Number.
This 8-bit value indicates the revision identification number for the
GMCH Device 1.
02h = A-2 Stepping
3.5.6.
SUBC1—Sub-Class Code Register (Device 1)
Address Offset:
Default Value:
Access:
Size:
0Ah
04h
Read-Only
8 bits
This register contains the Sub-Class Code for the GMCH Device 1. This code is 04h indicating a
PCI-PCI Bridge device. The register is read-only.
Bit
Description
7:0
Sub-Class Code (SUBC1).
This 8-bit value indicates the category of Bridge of the GMCH.
04h = Host Bridge.
3.5.7.
BCC1—Base Class Code Register (Device 1)
Address Offset:
Default Value:
Access:
Size:
0Bh
06h
Read-Only
8 bits
This register contains the Base Class Code of the GMCH Device 1. This code is 06h indicating a Bridge
device. This register is read-only.
Bit
Description
7:0
Base Class Code (BASEC).
This 8-bit value indicates the Base Class Code for the GMCH Device 1.
06h = Bridge device.