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2 System Board
Assigned Device Interrupts
Assigned Device Interrupts
Input/Output Controller Hub Interrupts
Device
REQ/
GNT
ID
IDSEL
AD[xx]
Chip-set Interrupt Connection
INTA INTB INTC INTD
CS4280 Audio Controller
0 5 21 — A — —
USB Controller
1
— — — — — — A
AGP slot
— 0 16 A B — —
PCI 32-bit slot #1
5 6 22 C D A B
PCI 32-bit slot #2
4 8 24 A B C D
PCI 32-bit slot #3
3 9 25 D A B C
PCI 32-bit slot #4 (SCSI
controller on some models)
2 10 26 C D A B
PCI 32-bit slot #5 (LAN card)
1 11 27 B C D A
1.
The USB interrupt is connected within the ICH to intD.