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IRQ# Typical Intterupt Resource Connected to Pin Available
20 N/A PCH internal GBE controller Note (1)
21 N/A UHCI Controller 5 Note (1)
22 N/A PCH HDA Note (1)
23 N/A UHCI Controller , EHCI Controller Note (1)
Note (1): These IRQs can be used for PCI devices when onboard device is disabled. If IRQ is from ISA, user must reserve IRQ for ISA in
BIOS setup menu.
6.5. PCI Configuration Space Map
Bus Number Device
Number
Function
Number
Routing Description
00h 1Fh 00h Internal LPC Interface Bridge
00h 1Fh 02h Internal SATA Controller #0
00h 1Fh 05h Internal SATA Controller #1
00h 1Fh 03h Internal SMBus Controller
00h 14h 00h Internal xHCI Controller
00 1Dh 00h Internal EHCI Controller #0
00 1Ah 00h Internal EHCI Controller #1
00 1Bh 00h Internal High Definition Audio
00 19h 00h Internal Gigabit LAN Controller
00 16h 00h Internal Management Engine
00h 1Ch 00h Internal PCIE Root Port #0
00h 1Ch 01h Internal PCIE Root Port #1
00h 1Ch 02h Internal PCIE Root Port #2
00h 1Ch 03h Internal PCIE Root Port #3
00h 1Ch 04h Internal PCIE Root Port #4
00h 1Ch 05h Internal PCIE Root Port #5
00h 1Ch 06h Internal PCIE Root Port #6
00h 00h 00h N/A Host Bridge
00h 02h 00h Internal I.G.F.X
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