Intel 925 - Pentium D 925 3.0GHz 800MHz 4MB-Cache Socket 775 CPU User Manual

Host-PCI Express* Graphics Bridge Registers (D1:F0)
R
118 Intel
®
82925X/82925XE MCH Datasheet
8.1.10 SBUSN1—Secondary Bus Number (D1:F0)
PCI Device: 1
Address Offset: 19h
Default Value: 00h
Access: RO
Size: 8 bits
This register identifies the bus number assigned to the second bus side of the “virtual” bridge i.e.
to PCI Express Graphics. This number is programmed by the PCI configuration software to allow
mapping of configuration cycles to PCI Express Graphics.
Bit Access &
Default
Description
7:0 R/W
00h
Secondary Bus Number (BUSN): This field is programmed by configuration
software with the bus number assigned to PCI Express*-G.
8.1.11 SUBUSN1—Subordinate Bus Number (D1:F0)
PCI Device: 1
Address Offset: 1Ah
Default Value: 00h
Access: R/W
Size: 8 bits
This register identifies the subordinate bus (if any) that resides at the level below PCI Express
Graphics. This number is programmed by the PCI configuration software to allow mapping of
configuration cycles to PCI Express Graphics.
Bit Access &
Default
Description
7:0 R/W
00h
Subordinate Bus Number (BUSN): This register is programmed by
configuration software with the number of the highest subordinate bus that lies
behind the device 1 bridge. When only a single PCI device resides on the PCI
Express*-G segment, this register will contain the same value as the SBUSN1
register.

Intel 925 - Pentium D 925 3.0GHz 800MHz 4MB-Cache Socket 775 CPU Specifications

General

Brand	Intel
Model	925 - Pentium D 925 3.0GHz 800MHz 4MB-Cache Socket 775 CPU
Category	Computer Hardware
Language	English