Hardware interrupts were introduced as an optimization, eliminating unproductive waiting time in polling loops, waiting for external events. The first system to use this approach was the DYSEAC, completed in 1954, … See more

Each interrupt signal input is designed to be triggered by either a logic signal level or a particular signal edge (level transition). Level-sensitive inputs continuously request … See more

Interrupts may be fully handled in hardware by the CPU, or may be handled by both the CPU and another component such as a See more

Interrupts are commonly used to service hardware timers, transfer data to and from storage (e.g., disk I/O) and communication interfaces (e.g., UART, Ethernet), handle keyboard and mouse … See more

Interrupt signals may be issued in response to hardware or software events. These are classified as hardware interrupts or … See more

The processor samples the interrupt trigger signals or interrupt register during each instruction cycle, and will process the highest priority enabled interrupt found. Regardless of the … See more

Interrupts provide low overhead and good latency at low load, but degrade significantly at high interrupt rate unless care is taken to … See more