HARDWARE INTERRUPTS. INTERRUPT CONTROLLER

Interrupting an interruption of the main calculation process for performing some planned or unplanned actions caused by work equipment or programs. Interrupt mechanism is supported at the hardware level. Hardware interrupts occur as a reaction to the physical microprocessor signal from a device (keyboard, system clock, keyboard, hard drive, etc.), time of occurrence These asynchronous interrupts Ie occur at random times. The interrupt controller for processing and arbitration of incoming service requests to the CPU from the peripheral devices. Interrupts have a certain priority, which allows the interrupt controller to give preference at any given time one device and not another. In today's computer there is up to 16 external and peripheral devices that generate interrupts.