HOWTO: Enable parallel port IRQ usage

    

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Article ID: Q700006

The information in this article applies to:

  • Direct I/O, version 4.2, 4.3, 4.4

SUMMARY

In Windows 2000 and Windows XP the parallel port driver by default doesn't allocate an interrupt. Nevertheless the driver can be configured to use a predefined interrupt. This article gives the detailed steps to perform this task.

MORE INFORMATION

Follow the steps given below to assign an interrupt to the parallel port:

  1. Assure you have sufficient rights to change the drivers configuration.
     
  2. Open the Control Panel element System.
     
  3. Select tab Hardware.
     
  4. Click button Device Manager... to open the Device Manager
     
  5. Expand the group Ports (COM & LPT).
     
  6. Double-click the desired LPT port.
     
  7. Select tab Port Settings.
     
  8. Change the Filter Resource Method to Use any interrupt assigned to the port and close all dialogs.
     
  9. You may have to restart your system depending on the Configuration Managers choice.

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Last modified: 2016-01-31.
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