301467-005 Datasheet, PDF (71/426 Pages) Intel Corporation – Express Chipset

Host Bridge/DRAM Controller Registers (D0:F0)
R
4.1.5
4.1.6
RID—Revision Identification (D0:F0)
PCI Device:
Address Offset:
Default Value:
Access:
Size:
0
08h
See bit description
RO
8 bits
This register contains the revision number of the (G)MCH Device 0.
Bit
Access &
Default
Description
7:0
RO
Revision Identification Number (RID): This field indicates the number of times
00h
that this device in this component has been “stepped” through the manufacturing
process. Refer to the Intel^® 82915G/82915P/82915GV/82910GL Express Chipset
Specification Update for the value of the Revision ID Register.
CC—Class Code (D0:F0)
PCI Device:
Address Offset:
Default Value:
Access:
Size:
0
09h
060000h
RO
24 bits
This register identifies the basic function of the device, a more specific sub-class, and a register-
specific programming interface.
Bit
23:16
15:8
7:0
Access &
Default
RO
06h
RO
00h
RO
00h
Description
Base Class Code (BCC): This is an 8-bit value that indicates the base class
code for the (G)MCH.
06h = Bridge device.
Sub-Class Code (SUBCC): This is an 8-bit value that indicates the category of
Bridge into which the (G)MCH falls.
00h = Host Bridge.
Programming Interface (PI): This is an 8-bit value that indicates the
programming interface of this device. This value does not specify a particular
register set layout and provides no practical use for this device.
Datasheet
71