IBASE Technology MB998 Series, User Manual, Page: 88 / 94

80 MB998
User’s Manual
B. Interrupt Request Lines (IRQ)
The following table shows the IRQ used by the devices on board.
Level Function
IRQ 0 System timer
IRQ 1 Standard PS/2 Keyboard
IRQ 3 Communications Port (COM2)
IRQ 4 Communications Port (COM1)
IRQ 5 Communications Port (COM3)
IRQ 7 Communications Port (COM4)
IRQ 12 Microsoft PS/2 Mouse
IRQ 14
Intel(R) Serial IO GPIO Host Controller -
INTC1056
IRQ 16
Intel(R) Serial IO UART Host Controller -
7AA8
IRQ 17 High Definition Audio Controller
IRQ 19
Intel(R) Active Management Technology -
SOL (COM13)
IRQ 27 Intel(R) Serial IO I2C Host Controller - 7ACC
IRQ 29 Intel(R) Serial IO I2C Host Controller - 7ACE
IRQ 31 Intel(R) Serial IO I2C Host Controller - 7AFC
IRQ 32 Intel(R) Serial IO I2C Host Controller - 7AFD
IRQ 37 Intel(R) Serial IO SPI Host Controller - 7AAB
IRQ 43 Intel(R) Serial IO I2C Host Controller - 7ACF
IRQ 55~IRQ 204 Microsoft ACPI-Compliant System
IRQ 256~IRQ 511 Microsoft ACPI-Compliant System
IRQ 4294967239 Intel(R) Management Engine Interface #1
IRQ 4294967240~64 Intel(R) Ethernet Controller I226-LM
IRQ 4294967265~89 Intel(R) Ethernet Controller I226-V
IRQ 4294967290
Intel(R) USB 3.20 eXtensible Host Controller -
1.20 (Microsoft)
IRQ 4294967291 Intel(R) UHD Graphics 770
IRQ 4294967292 Standard SATA AHCI Controller
IRQ 4294967293 Intel(R) PCI Express Root Port #4 - 7ABB
IRQ 4294967294 Intel(R) PCI Express Root Port #3 - 7ABA