EBC-C413/Configuration
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7.3
Interrupt Map
The EBC-C413 supports hardware interrupts (IRQs) for PC104 (ISA), PCI,
and PCIe devices. The user must reserve IRQs in the BIOS CMOS
configuration for use by legacy devices. The PCIe/PnP BIOS uses
unreserved IRQs when allocating resources during the boot process. The
following tables outline the EBC-C413 IRQ resource allocations.
IRQ Resources
IRQ
Device
IRQ0
18.2 Hz Heartbeat
IRQ1
Keyboard
IRQ2
Chained to Slave Controller (IRQ9)
IRQ3
COM2 *
IRQ4
COM1 *
IRQ5
COM3 *
IRQ6
COM4 *
IRQ7
LPT Port
IRQ8
Real Time Clock
IRQ9
FREE **
IRQ10
Digital I/O
IRQ11
PCI Interrupts
IRQ12
Mouse
IRQ13
Floating Point Processor
IRQ14
SATA Controller
IRQ15
SATA Controller ***
Some IRQs can be freed for other uses if the hardware features they are assigned to are not being
used. To free an
interrupt, use the CMOS setup screens to disable any unused board features or their IRQ
assignments.
*These IRQ references are default settings that can be changed by the user in the CMOS Settings
utility. Reference the Super I/O Control section under Intel.
**IRQ9 is commonly used by ACPI when enabled and may be unavailable (depending on operating
system) for other uses.
***IRQ15 is currently unavailable under the Windows operating systems.