Microsoft KB Archive/82382

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InPort Mouse Not Functioning Correctly on IRQ2

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Q82382

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The information in this article applies to:


 * Microsoft Windows versions 3.1, 3.11

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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).

Additional query words: 3.10 3.1 3.11

Keywords :

Issue type :

Technology : kbWin3xSearch kbWin310 kbWin311