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Table 41. Interrupts (continued)
IRQ System Resource
12 Onboard mouse port (if present, else user available)
13 Reserved, math coprocessor
14 Primary IDE (if present, else user available)
15 Secondary IDE (if present, else user available)
16
(Note 2)
AGP video (through PIRQA)
17
(Note 2)
AC '97 audio/User available (through PIRQB)
18
(Note 2)
(optional) (through PIRQC)
19
(Note 2)
ICH2 USB controller 1 (through PIRQD)
20
(Note 2)
On-board ATI Rage XL PCI
21
(Note 2)
(optional)/User available (through PIRQF)
22
(Note 2)
(optional)/User available (through PIRQG)
23
(Note 2)
ICH2 USB controller 2/User available (through PIRQH)
Notes:
1. Default, but can be changed to another IRQ.
2. Available in APIC mode only.
92 Intel Server Board S845WD1-E Product Guide