Intel BLKD101GGCL - Interrupts

Intel Desktop Board D101GGC Technical Product Specification
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2.4 Interrupts
The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the
Advanced Programmable Interrupt Controller (APIC) portion of the IXP 450 Southbridge
component. The PIC is supported in Windows 98 SE and Windows ME and uses the first
16 interrupts. The APIC is supported in Windows 2000 and Windows XP and supports a total of
24 interrupts.
Table 12. Interrupts
IRQ System Resource
NMI I/O channel check
0 Reserved, interval timer
1 Reserved, keyboard buffer full
2 Reserved, cascade interrupt from slave PIC
3 COM2
(Note 1)
4 COM1
(Note 1)
5 LPT2 (Plug and Play option)/User available
6 Diskette drive
7 LPT1
(Note 1)
8 Real-time clock
9 User available
10 User available
11 User available
12 Onboard mouse port (if present, else user available)
13 Reserved, math coprocessor
14 Primary IDE/Serial ATA (if present, else user available)
15 Secondary IDE/Serial ATA (if present, else user available)
16
(Note 2)
User available (through PIRQA)
17
(Note 2)
User available (through PIRQB)
18
(Note 2)
User available (through PIRQC)
19
(Note 2)
User available (through PIRQD)
20
(Note 2)
User available (through PIRQE)
21
(Note 2)
User available (through PIRQF)
22
(Note 2)
User available (through PIRQG)
23
(Note 2)
User available (through PIRQH)
Notes:
1. Default, but can be changed to another IRQ.
2. Available in APIC mode only.