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IOPS-302 User Manual
B. Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the service
required. The following table shows the IRQ used by the devices on board.
Level
Function
IRQ 0
High precision event timer
IRQ 0
System timer
IRQ 1
Standard PS/2 Keyboard
IRQ 3
Communications Port (COM2)
IRQ 4
Communications Port (COM1)
IRQ 8
High precision event timer
IRQ 12
Microsoft PS/2 Mouse
IRQ 18
Standard Enhanced PCI to USB Host Controller
IRQ 19
AMD SATA Controller
IRQ 31
High Definition Audio Controller
IRQ 46
High Definition Audio Controller
IRQ 54 ~ IRQ 204
Microsoft ACPI-Compliant System
IRQ 256 ~ IRQ 511
Microsoft ACPI-Compliant System
IRQ 4294967285
AMD USB 3.0 eXtensible Host Controller - 1.0
(Microsoft)
IRQ 4294967286
AMD USB 3.0 eXtensible Host Controller - 1.0
(Microsoft)
IRQ 4294967287
AMD USB 3.0 eXtensible Host Controller - 1.0
(Microsoft)
IRQ 4294967288
AMD USB 3.0 eXtensible Host Controller - 1.0
(Microsoft)
IRQ 4294967289
AMD USB 3.0 eXtensible Host Controller - 1.0
(Microsoft)
IRQ 4294967290
Realtek PCIe GBE Family Controller
IRQ 4294967291
AMD Radeon R7 Graphics
IRQ 4294967292
AMD PSP 2.0 Device
IRQ 4294967293
AMD PSP 2.0 Device
IRQ 4294967294
PCI Express Root Port