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What is Interrupt

Interrupts

What is an Interrupt?

An interrupt is a signal to the CPU that an event has occurred and requires immediate attention.

Types of Interrupts

  • Hardware interrupts: Generated by hardware devices, such as keyboard or network interface.
  • Software interrupts: Generated by software, such as a system call or exception.

How Interrupts Work

  • The CPU receives an interrupt signal.
  • The CPU saves its current state.
  • The CPU executes an interrupt handler (ISR) to handle the interrupt.
  • The CPU restores its previous state.

Importance of Interrupts

  • Enable multitasking: Interrupts allow the CPU to switch between tasks.
  • Improve system responsiveness: Interrupts enable the system to respond to events in real-time.
  • Handle hardware events: Interrupts allow the system to handle hardware events, such as keyboard presses or network packets.
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