Intel S845WD1-E manual Onboard mouse port if present, else user available

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