4 system resources, 1 interrupt request (irq) lines, 1 in 8259 pic mode – Kontron COMe-cPC2 User Manual
Page 52: System resources, Interrupt request (irq) lines, In 8259 pic mode, Come-cpc2 / system resources
COMe-cPC2 / System Resources
4 System Resources
4.1
Interrupt Request (IRQ) Lines
Please be aware that an ACPI OS decides itself on resource usage. The tables below show only an example distribution.
4.1.1
In 8259 PIC Mode
IRQ#
Used For
Available
Comment
0
Timer 0
No
-
1
Keyboard
No
Note (4)
2
Slave 8259
No
-
3
-
Yes
-
4
-
Yes
-
5
-
Yes
-
6
-
Yes
-
7
-
Yes
-
8
RTC
No
-
9
SCI
No
Note (3)
10
-
Yes
-
11
-
Yes
-
12
PS/2 Mouse
No
Note (5)
13
FPU
No
-
14
IDE0
No
Note (1)(2)
15
IDE1
No
Note (1)(2)
1 If the “Used For” device is disabled in setup, the corresponding interrupt is available for
other devices.
2 if sata controller is operating in legacy mode
3 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.
4 used by legacy keyboard controller when available on carrier board.
5 used by legacy ps/2 mouse controller when available on carrier board.
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