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WMI Libraly > Win32_IRQResource Class

Win32_IRQResource Class

The Win32_IRQResource class represents an interrupt request line (IRQ) number on a Win32 computer system. An interrupt request is a signal sent to the CPU by a device or program for time critical events. IRQ can be hardware or software based.
Namespace value is root/CIMV2.
WMI Provider value is CIMWin32.


  • Availability
  • Availability of the IRQ.

  • Caption
  • The Caption property is a short textual description (one-line string) of the object.

  • CreationClassName
  • CreationClassName indicates the name of the class or the subclass used in the creation of an instance. When used with the other key properties of this class, this property allows all instances of this class and its subclasses to be uniquely identified.

  • CSCreationClassName
  • CSCreationClassName contains the scoping computer system's creation class name.

  • CSName
  • CSName contains the scoping computer system's name.

  • Description
  • The Description property provides a textual description of the object.

  • Hardware
  • The Hardware property indicates whether the interrupt is hardware or software based. A hardware IRQ is a physical wire from the peripheral to the programmable interrupt controller (PIC) chip through which the CPU can be notified of time critical events. Some IRQ lines are reserved for standard devices such as the keyboard, floppy disk drives, and the system clock. A software interrupt allows applications to get the attention of the processor.
    Values: TRUE or FALSE. A value of TRUE indicates the interrupt is hardware based.

  • InstallDate
  • The InstallDate property is datetime value indicating when the object was installed. A lack of a value does not indicate that the object is not installed.

  • IRQNumber
  • A part of the object's key value, IRQ Number.

  • Name
  • The Name property defines the label by which the object is known. When subclassed, the Name property can be overridden to be a Key property.

  • Shareable
  • Boolean indicating whether the IRQ can be shared.

  • Status
  • The Status property is a string indicating the current status of the object. Various operational and non-operational statuses can be defined. Operational statuses are "OK", "Degraded" and "Pred Fail". "Pred Fail" indicates that an element may be functioning properly but predicting a failure in the near future. An example is a SMART-enabled hard drive. Non-operational statuses can also be specified. These are "Error", "Starting", "Stopping" and "Service". The latter, "Service", could apply during mirror-resilvering of a disk, reload of a user permissions list, or other administrative work. Not all such work is on-line, yet the managed element is neither "OK" nor in one of the other states.

  • TriggerLevel
  • IRQ trigger level indicating whether the interrupt is triggered by the hardware signal going high (value=4) or low (value=3). Also, "Other" (1) and "Unknown" (2) may be defined.

  • TriggerType
  • IRQ trigger type indicating whether edge (value=4) or level triggered (value=3) interrupts occur. Also, "Other" (1) and "Unknown" (2) may be defined.

  • Vector
  • The Vector property indicates the vector of the Win32 IRQ resource. A vector contains the memory address to the function that will execute once the CPU acknowledges the interrupt request.


    Method not found.

    Example WQL

    SELECT * FROM Win32_IRQResource
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