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How to Use Device Manager to Check the Status of a Resource

This article was previously published under Q141497
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
This article describes how to use Device Manager to check the status of aresource (such as an IRQ line, DMA channel, memory address range, or I/Oaddress range).

You may need to check the status of a resource when you are installing anew device in your computer, or when you suspect that a resource conflictis causing a device not to function.
To check the status of a resource, follow these steps:
  1. In Control Panel, double-click System.
  2. Click the Device Manager tab.
  3. Click Computer, and then click Properties.
  4. On the View Resources tab, click the option button for the type of resource you want to check. You see a list of resources and the hardware using each resource. If a specific resource is not listed, Windows 95 has not detected that a device is using that resource. If a resource is listed more than once, Windows 95 has detected that more than one device is using that resource. If Windows 95 reports that an unknown device is using a resource, the resource is in use but Windows 95 is unable to detect the device using the resource.
You can also print reports containing information about the resources inuse. The Resource Summary report lists the current resource settings. TheSystem Resource report lists current resource settings, the hardware usingeach resource, and additional detailed information about each deviceinstalled in your computer. To print these reports, follow these steps:
  1. In Control Panel, double-click System.
  2. Click the Device Manager tab.
  3. Click Computer, and then click Print.
  4. Click either option in the Report Type box, and then click OK.


An IRQ (interrupt request) is a signal generated by a component in thecomputer or a device installed in the computer indicating that thecomponent or device needs processor time. The number associated with an IRQindicates the interrupt request line that the component or device uses tocommunicate with the processor.

DMA (direct memory access) is a technique that some components and devicesuse to transfer data directly to and from memory without passing throughthe processor. The number associated with DMA indicates the direct memoryaccess channel that the component or device uses to transfer data to andfrom memory.

A memory address range is a range in memory that a component or device isusing to store data. An I/O address range is a special range in memory thatthe computer uses to communicate with a component or device.
For additional information about troubleshooting device conflicts withDevice Manager, please see the following article in the MicrosoftKnowledge Base:
133240 Troubleshooting Device Conflicts with Device Manager
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Article ID: 141497 - Last Review: 11/15/2006 17:16:22 - Revision: 1.1

  • Microsoft Windows 95
  • KB141497