Datasheet

Configuration Registers
3-6 Intel
®
E8870 Scalable Node Controller (SNC) Datasheet
3.5.4 RID: Revision Identification Register
This register contains the revision number of the SNC.
3.5.5 HDR: Header Type Register
This register identifies the header layout of the configuration space.
3.5.6 SVID: Subsystem Vendor Identification Register
This register identifies the manufacturer of the system. This 16-bit register, combined with the
Device Identification Register, uniquely identifies any PCI device.
Device: NodeID
Function: 0,1,2,3
Offset: 08h
Bit Attr Default Description
7:0 RO See Description
Revision Identification Number
00h = A0 stepping
01h = A1 stepping
02h = A2 stepping
03h = A3 stepping
10h = B0 stepping
20h = C0 stepping
Device: NodeID
Function: 0,1,2,3
Offset: 0Eh
Bit Attr Default Description
7RO1
Multi-function Device
This bit indicates if the SNC is a multi-function device. The SNC has more than 256
bytes of configuration registers alloted to a single function. Therefore, the SNC is
defined to be a multifunction device, and this bit is hardwired to 1.
6:0 RO 0
Configuration Layout
This field identifies the format of the standard PCI configuration header space (10h
through 3Fh space). The SNC uses header type “00”. These bits are hardwired to
00h.
Device: NodeID
Function: 0,1,2,3
Offset: 2Ch
Bit Attr Default Description
15:0 RWO 8086h
Vendor Identification Number
The default value specifies Intel as the subsytem vendor ID for the SNC. Each byte
of this register will be writable once. Second and successive writes to a byte will
have no effect.