Kontron microETXexpress-DC, User Manual

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5 System Ressources
5.1 Interrupt Request (IRQ) Lines
Please be aware that an ACPI OS decides itself on resource usage. The tables below show only an example distribution.
5.1.1 In 8259 PIC Mode
IRQ# Used For Available Comment
0 Timer 0 No
1 Keyboard No
2 Slave 8259 No
3 COM2 Yes Note(1)
4 COM1 Yes Note(1)
5 Free Yes
6 Floppy Drive Controller Yes Note(1)
7 LPT1 Yes Note(1)
8 RTC No
9 SCI No Note(2)
10 Free Yes
11 Free Yes
12 PS/2 Mouse No Note(1)
13 FPU No
14 IDE0 No Note(1)
15 IDE1 No Note(1)
1 If the “Used For” device is disabled in setup, the corresponding interrupt is available for
other devices.
2 Unavailable in Advanced Configuration and Power Interface (ACPI) mode. Used as System
Control Interrupt (SCI) in ACPI mode. Currently not free in Non-ACPI mode.
5.1.2 In APIC mode
IRQ# Used For Available Comment
0 Timer 0 No
1 Keyboard No
2 Slave 8259 No
3 COM2 Yes Note (1)
4 COM1 Yes Note (1)
5 PCI/LPT2 Yes
6 Floppy Drive Controller Yes Note (1)
7 LPT1 Yes Note (1)
8 RTC No
9 SCI No Note (2)
10 COM3 No Note (1)
11 COM4 No Note (1)
12 PS/2 Mouse Yes Note (1)
13 FPU No
14 IDE0 No Note (1)
15 IDE1 No Note (1)
16 PIRQ[A] For PCI PCI IRQ line 1 + Graphics cont HD Audio Cont secondary IDE
17 PIRQ[B] For PCI PCI IRQ line 2 + AC'97 Audio controller
18 PIRQ[C] For PCI PCI IRQ line 3 + USB UHCI controller #3 + SATA (native mode)
19 PIRQ[D] For PCI PCI IRQ line 4 + USB UHCI controller #2 + IDE (native mode)
20 PIRQ[E] No Lan Controller
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