Datasheet

Processor Configuration Registers
90 Datasheet, Volume 2
2.6.5 RID1—Revision Identification Register
This register contains the revision number of the processor root port. These bits are
read only and writes to this register have no effect.
2.6.6 CC1—Class Code Register
This register identifies the basic function of the device, a more specific sub-class, and a
register- specific programming interface.
B/D/F/Type: 0/1/0–2/PCI
Address Offset: 8h
Reset Value: 00h
Access: RO-FW
Size: 8 bits
Bit Attr
Reset
Value
RST/
PWR
Description
7:4 RO-FW 0h Uncore
Revision Identification Number MSB (RID_MSB)
This is an 8-bit value that indicates the revision identification
number for the root port. Refer to the 2nd Generation Intel
®
Core™ Processor Family Desktop, Intel
®
Pentium
®
Processor
Family Desktop, and Intel
®
Celeron
®
Processor Family Desktop
Specification Update for the value of the RID register.
3:0 RO-FW 0h Uncore
Revision Identification Number (RID)
This is an 8-bit value that indicates the revision identification
number for the root port. Refer to the 2nd Generation Intel
®
Core™ Processor Family Desktop, Intel
®
Pentium
®
Processor
Family Desktop, and Intel
®
Celeron
®
Processor Family Desktop
Specification Update for the value of the RID register.
B/D/F/Type: 0/1/0–2/PCI
Address Offset: 9–Bh
Reset Value: 060400h
Access: RO
Size: 24 bits
Bit Attr
Reset
Value
RST/
PWR
Description
23:16 RO 06h Uncore
Base Class Code (BCC)
This field indicates the base class code for this device. This code
has the value 06h, indicating a Bridge device.
15:8 RO 04h Uncore
Sub-Class Code (SUBCC)
This field indicates the sub-class code for this device. The code is
04h indicating a PCI to PCI Bridge.
7:0 RO 00h Uncore
Programming Interface (PI)
This field 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.