CPU Interrupts and Service Routines
7 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

How does the CPU identify the device that is requesting an interrupt?

  • Through a unique interrupt vector assigned to each device. (correct)
  • Through a predefined order of device requests.
  • By the priority level assigned to each device.
  • By checking the memory address of the interrupt request.

    • What enables the CPU to obtain the starting address of the appropriate interrupt service routine?

  • A fixed memory location for all routines.
  • A table that contains the addresses of service routines for different devices. (correct)
  • A dynamic allocation system for retrieving routine addresses.
  • Hardcoded addresses within the CPU architecture.

    • Should devices be allowed to interrupt the CPU while another interrupt is currently being serviced?

  • No, this would cause conflicts and instability. (correct)
  • Yes, all devices can interrupt at any time.
  • Yes, but only devices with higher priorities.
  • No, unless the service routine explicitly allows it.

    • What approach can the CPU use to handle multiple simultaneous interrupt requests?

    <p>Implement a priority scheme for interrupt handling.</p> Signup and view all the answers

    What role does an interrupt vector play in the interrupt handling process?

    <p>It maps devices to their respective interrupt service routines.</p> Signup and view all the answers

    Signup and view all the answers

    Signup and view all the answers

    Study Notes

    CPU Interrupt Recognition

    • Devices signal interrupts using unique, dedicated lines.
    • Each device has a unique interrupt request line to distinguish which device needs service.
    • The CPU continuously monitors these lines.

    Interrupt Service Routine Addressing

    • Different devices require different interrupt service routines (ISRs).
    • ISRs are stored at specific memory locations.
    • Each device's interrupt request is associated with a particular memory address containing the start of its ISR.
    • The CPU utilizes this address to jump to the correct handling routine.
    • The mapping between the device's interrupt line and the ISR address is often fixed in hardware or in a table.

    Interrupt Priority

    • Some situations might require a CPU to handle interrupts in order of priority.
    • Multiple interrupting devices are possible.
    • A priority scheme helps to prioritize these interrupts.
    • It decides which interrupt request should be serviced first.
    • Devices with higher priority interrupts are handled prior to those with lower priority if they both occur at the same time.

    Handling Simultaneous Interrupt Requests

    • A prioritized interrupt scheme manages simultaneous interrupts.
    • If multiple interrupts arrive simultaneously, CPUs can handle them based on priority.
    • Some architectures may temporarily disable interrupts.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Explore the intricacies of CPU interrupt recognition and servicing in this quiz. Understand how devices send interrupt signals, how interrupt service routines are addressed, and the importance of prioritizing interrupts. Test your knowledge on these vital concepts in computing.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser