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  2. Interrupt handler - Wikipedia

    en.wikipedia.org/wiki/Interrupt_handler

    In computer systems programming, an interrupt handler, also known as an interrupt service routine or ISR, is a special block of code associated with a specific interrupt condition. Interrupt handlers are initiated by hardware interrupts, software interrupt instructions, or software exceptions , and are used for implementing device drivers or ...

  3. Interrupt - Wikipedia

    en.wikipedia.org/wiki/Interrupt

    A hardware interrupt is a condition related to the state of the hardware that may be signaled by an external hardware device, e.g., an interrupt request (IRQ) line on a PC, or detected by devices embedded in processor logic (e.g., the CPU timer in IBM System/370), to communicate that the device needs attention from the operating system (OS) [7] or, if there is no OS, from the bare metal ...

  4. Interrupt request - Wikipedia

    en.wikipedia.org/wiki/Interrupt_request

    In a computer, an interrupt request (or IRQ) is a hardware signal sent to the processor that temporarily stops a running program and allows a special program, an interrupt handler, to run instead. Hardware interrupts are used to handle events such as receiving data from a modem or network card, key presses, or mouse movements.

  5. Programmable interrupt controller - Wikipedia

    en.wikipedia.org/wiki/Programmable_interrupt...

    It helps prioritize IRQs so that the CPU switches execution to the most appropriate interrupt handler (ISR) after the PIC assesses the IRQs' relative priorities. Common modes of interrupt priority include hard priorities, rotating priorities, and cascading priorities. [citation needed] PICs often allow mapping input to outputs in a configurable ...

  6. Interrupt vector table - Wikipedia

    en.wikipedia.org/wiki/Interrupt_vector_table

    An interrupt vector table (IVT) is a data structure that associates a list of interrupt handlers with a list of interrupt requests in a table of interrupt vectors. Each entry of the interrupt vector table, called an interrupt vector, is the address of an interrupt handler (also known as ISR). While the concept is common across processor ...

  7. Context switch - Wikipedia

    en.wikipedia.org/wiki/Context_switch

    For interrupts, a program called an interrupt handler is installed, and it is the interrupt handler that handles the interrupt from the disk. When an interrupt occurs, the hardware automatically switches a part of the context (at least enough to allow the handler to return to the interrupted code).

  8. Event (computing) - Wikipedia

    en.wikipedia.org/wiki/Event_(computing)

    In computer programming, an event handler may be implemented using a callback subroutine that handles inputs received in a program (called a listener in Java and JavaScript [4]). Each event is a piece of application-level information from the underlying framework , typically the GUI toolkit .

  9. Interrupt descriptor table - Wikipedia

    en.wikipedia.org/wiki/Interrupt_descriptor_table

    The interrupt descriptor table (IDT) is a data structure used by the x86 architecture to implement an interrupt vector table.The IDT is used by the processor to determine the memory addresses of the handlers to be executed on interrupts and exceptions.