Interrupts - Intel BOXD915GEV - LGA775 800FSB 4DDR2 Aud+Vdo SATA ATX 4PCI Manual

Intel Desktop Board D915GEV/D915GRF Technical Product Specification

2.6 Interrupts

The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the
Advanced Programmable Interrupt Controller (APIC) portion of the ICH6 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 14.

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
4 COM1
5 LPT2 (Plug and Play option)/User available
6 Diskette drive
7 LPT1
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)
(Note 2)
16 User available (through PIRQA)
(Note 2)
17 User available (through PIRQB)
(Note 2)
18 User available (through PIRQC)
(Note 2)
19 User available (through PIRQD)
(Note 2)
20 User available (through PIRQE)
(Note 2)
21 User available (through PIRQF)
(Note 2)
22 User available (through PIRQG)
(Note 2)
23 User available (through PIRQH)
Notes:
1. Default, but can be changed to another IRQ.
2. Available in APIC mode only.
56
(Note 1)
(Note 1)
(Note 1)