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To advances in the operating system, the old advice about IRQ sharing However, since the introduction of Windows 2000, true IRQĬonflicts have been extremely rare, for the reasons listed below. Problems severe enough to freeze, or lock up, your computer. IRQ conflicts result in errors because the CPU can't figure out Windows, but occur only rarely in modern versions of the operating These conflicts were common in older versions of Number, and the operating system or motherboard has no mechanism forĪccommodating this. Some devices that are assigned IRQ numbers include theĭisk drive controllers (floppy and hard disk), mouse, keyboard, andĪn IRQ conflict happens when two devices attempt to use the same IRQ The IRQ number, the more important the need for the input or action to Priority that the devices have with the CPU. The IRQ number is a numeric way to assign the Process to each hardware device that needs one.Ī device requires an IRQ number if it is able to provide input to theĬPU or start an action. "needing servicing".) IRQ numbers are assigned during the boot

(A hardwareĭevice that needs attention from the CPU is often referred to as

The Interrupt Request made through the device's IRQ number signals theĬPU that the device has a request that needs processing. Interrupt Request number (the IRQ number) to each device and its path Path (e.g., the serial port or the PCI bus), it needs a way These Interrupt Requests at once from various devices along the same Something (such as move the cursor as you move the mouse), the device When a hardware device needs the CPU to do Information here may no longer be accurate, and links may no longer be available or reliable.Īn Interrupt Request is a signal from a hardware device on yourĬomputer to your CPU. This content has been archived, and is no longer maintained by Indiana University.