Specifications

AR-B1564 User¡¦s Guide
2-2
2.3 INTERRUPT CONTROLLER
The equivalent of two 8259 Programmable Interrupt Controllers (PIC) are included on the AR-B1564 board. They
accept requests from peripherals, resolve priorities on pending interrupts in service, issue interrupt requests to the
CPU, and provide vectors which are used as acceptance indices by the CPU to determine which interrupt service
routine to execute.
Following is the system information of interrupt levels:
IRQ9 : Rerouting to INT 0Ah from hardware IRQ2IRQ10 : USB (Ref. section Advanced Chipset Setup)
Figure 2-1 Interrupt Controller