Appendix a: system resources, A.1 interrupt request (irq) lines, Kta55/pitx user's guide – Kontron KTA55-pITX User Manual
Page 51: Legacy mode
KTD-S0031-E
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Appendix A: System Resources
KTA55/pITX User's Guide
Appendix A: System Resources
A.1
Interrupt Request (IRQ) Lines
Please ensure that the chosen interrupt is not already in use by PCI devices. This table is only valid in legacy
mode (e.g. DOS) - most operating systems are using the APIC assignment.
Legacy mode
IRQ #
Used for
Available
Comment
0
Timer 0
No
1
Keyboard
No
2
8259 Slave (Cascade)
No
3
Yes
4
PCI IRQ
for PCI
5
Yes
6
Yes
7
PCI IRQ
for PCI
8
Real Time Clock (RTC)
No
9
ACPI Power Management
No
10
PCI IRQ
for PCI
11
PCI IRQ
for PCI
12
Yes
13
Floating Point Unit (FPU)
No
14
S-ATA (Legacy IDE)
Yes
Note (1)
15
S-ATA (Legacy IDE)
Yes
Note (1)
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