5 rid - register identification, 6 subc - sub class code register, Rid – register identification – Intel D15343-003 User Manual
Page 54: Subc – sub class code register, 5 rid – register identification, 6 subc – sub class code register
Intel
®
82854 Graphics Memory Controller Hub (GMCH)
54
D15343-003
4.8.5
RID – Register Identification
This register contains the revision number of the GMCH Device #0. These bits are read only and
writes to this register have no effect.
4.8.6
SUBC – Sub Class Code Register
This register contains the Sub-Class Code for the GMCH Device #0. This code is 00h indicating a
Host Bridge device.
Address Offset:
Default Value:
Access:
Size:
08h
02h
Read only
8 bits
Bit
Descriptions
7:0
Revision Identification Number (RID):
This is an 8-bit value that indicates the revision
identification number for the GMCH Device #0.
Address Offset:
Default Value:
Access:
Size:
0Ah
00h
Read only
8 bits
Bit
Descriptions
7:0
Sub-Class Code (SUBC)
: This is an 8-bit value that indicates the category of Bridge into which
the GMCH falls. The code is 00h indicating a Host Bridge.