User manual

4. Interrupt Controller
32
following table. The base address of the master interrupt controller is 20h and the base
address of the slave interrupt controller is A0h.
Interrupt Controller Register Addressing
Address Register Operation
Base+0h IRR, ISR, IPR Read
Base+0h ICW1 Write
Base+0h OCW2, OCW3 Write
Base+1h OCW1 Read/Write
Base+1h ICW2, ICW3, ICW4 Write