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Configuration
CP307
Page 4 - 4
ID 34424, Rev. 3.0
P R E L I M I N A R Y
4.2
Legacy Interrupts
The CP307 board uses the standard AT IRQ routing (8259 controller) for legacy devices.
The following table indicates the default interrupt routing. The shaded table cells indicate the
interrupt routings which can be modified or disabled via the BIOS setup.
Table 4-2: Legacy Interrupt Setting
IRQ
PRIORITY
STANDARD FUNCTION
IRQ0
1
System Timer
IRQ1
2
Keyboard Controller
IRQ2
--
Input of the second IRQ controller (IRQ8-IRQ15)
IRQ3
11
COM2
IRQ4
12
COM1
IRQ5
13
Watchdog
IRQ6
14
Free
IRQ7
15
Free
IRQ8
3
System Real-Time Clock
IRQ9
4
APIC
IRQ10
5
Free
IRQ11
6
Free
IRQ12
7
PS/2 mouse: on the 8HP version
Free: on the 4HP version
IRQ13
8
Coprocessor error
IRQ14
9
IDE/CompactFlash/SATA
IRQ15
10
Free
NMI
Watchdog
Warning!
IRQ5 should normally have only
one
source enabled, otherwise improper
system operation may result.
If more than one source is required to be enabled, please contact Kontron
before implementing the IRQs.
For events that are not time critical, such as ENUM, DERATE, etc., poll-
ing should be considered instead of using an IRQ.
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