InPort Mouse Not Functioning Correctly on IRQ2

Last reviewed: November 30, 1994
Article ID: Q82382

The information in this article applies to:

Microsoft Windows operating system versions 3.1, 3.11

SYMPTOMS

Using the Microsoft InPort (BUS) mouse on IRQ2 in Microsoft Windows has reportedly caused the mouse not to function correctly in both standard and enhanced modes on some systems.

CAUSE

This may be due to an interrupt conflict. IRQ2 also cascades to the second Intel 8259 PIC chip. By default, these boards are set to IRQ2.

RESOLUTION

To correct this problem, change the IRQ to an open IRQ. IRQ 5 is usually free on AT class machines (except the original IBM AT).

KBCategory: kbsetup kbinterop kbhw
KBSubcategory: win31
Additional reference words: 3.10 3.1 3.11

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: November 30, 1994
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.