Dual PCI IDE Controllers Use IRQs 14 and 15

 Last reviewed: August 21, 1995
Article ID: Q126279
The information in this article applies to:
  • Microsoft Windows 95

SYMPTOMS

IRQs 14 and 15 are enabled even if there is nothing attached to the IDE controllers.

CAUSE

Some computers come with dual IDE controllers on the PCI bus. When Windows 95 detects the dual IDE controllers it reserves IRQs 14 and 15 for them even if there are no devices attached to the controllers.

WORKAROUND

To free one of the IRQs, follow these steps:

  1. Disable the appropriate IDE controller in the computer's BIOS.

  2. Click the Start button, point to Settings, and then click Control Panel.

  3. Double-click the System icon.

  4. Click the Device Manager tab.

  5. Double-click Hard Disk Controllers.

  6. Under Hard Disk Controllers, click the controller you want to disable and then click the Properties button.

  7. In the Device Usage box, click the check box for the configuration in which you want to disable the controller, and then click the OK button.

KBCategory: kbhw
KBSubcategory: wpp95 win95 winpnp diskmem
Additional reference words: 95

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Last reviewed: August 21, 1995
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