PPM-C407/Configuration
v1.0
www.winsystems.com
Page 12
NOTE
A 1 will be read for devices with an interrupt pending.
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 ***
* 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.
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.
Interrupt Status Register - 29CH
Bit
Name
Bit 0
COM1
Bit 1
COM2
Bit 2
COM3
Bit 3
COM4
Bit 4
N/A
Bit 5
N/A
Bit 6
N/A
Bit 7
N/A
WinSystems does not provide software support for implementing the Interrupt Status Register to share interrupts.
Some operating systems, such as Windows XP and Linux, have support for sharing serial port interrupts (see your
specific operating system’s documentation for any available examples). You will need to implement the appropriate
software to share interrupts for the other devices.
IRQ resources
(Continued)
IRQ
Device
PRELIMINARY
