PCAN-PC/104 – User Manual
16
2.4.2
Deactivating the APIC Mode
Note:
Do not mix up APIC with ACPI.
The APIC mode is a certain type of interrupt management in a
computer.
If the APIC mode is active in your computer, you must deactivate it
so that the PCAN-PC/104 card can work properly with interrupts.
Do the following to determine in Windows if the APIC mode is
active:
Open the Windows
Device Manager
.
1.
Select the menu entry
View
>
Resources by type
.
2.
Open the branch of
Interrupt request (IRQ)
.
If entries with interrupt numbers greater than 15 are listed,
the APIC mode is active and you must deactivate it.
Do the following to deactivate the APIC mode:
Important note:
When you deactivate the APIC mode in the
BIOS setup, it may happen that you must reinstall Windows
afterwards, because it cannot start anymore due to the low-
level setting.
Restart the computer and switch to the BIOS setup.
1.
Search for the APIC setting and deactivate it.
2.
Save the changes in the BIOS and quit the BIOS setup.
3.
If Windows doesn't start properly, reinstall it or perform a
repair installation.
