Technical Reference
49
2.4 PCI Configuration Space Map
Table 12. PCI Configuration Space Map
Bus
Number (hex)
Device
Number (hex)
Function
Number (hex)
Description
00
00
00
Memory controller of Intel 82955X component
00
01
00
PCI Express x16 graphics port
00
1B
00
Intel High Definition Audio Controller
00
1C
00
PCI Express port 1 (PCI Express x1 bus connector 1)
00
1C
01
PCI Express port 2 (Gigabit Ethernet controller bridge)
00
1C
02
PCI Express port 3
00
1C
03
PCI Express port 4 (not used)
00
1D
00
USB UHCI controller 1
00
1D
01
USB UHCI controller 2
00
1D
02
USB UHCI controller 3
00
1D
03
USB UHCI controller 4
00 1D 07 EHCI
controller
00 1E 00 PCI
bridge
00 1F 00 PCI
controller
00
1F
01
Parallel ATA IDE controller
00 1F 02 Serial
ATA
controller
00 1F 03 SMBus
controller
(Note)
00 00 Gigabit
Ethernet
Controller
(Note)
00
00
PCI Conventional bus connector 1
(Note)
01
00
PCI Conventional bus connector 2
(Note)
02
00
PCI Conventional bus connector 3
(Note)
05 00 IEEE-1394a/b
controller
Note:
Bus number is dynamic and can change based on add-in cards used.