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From: gordonl@microsoft.UUCP (Gordon Letwin)
Newsgroups: net.micro.pc
Subject: Fix for MS-Mouse/XT Problem
Message-ID: <8672@microsoft.UUCP>
Date: Wed, 23-Nov-83 14:56:22 EST
Article-I.D.: microsof.8672
Posted: Wed Nov 23 14:56:22 1983
Date-Received: Thu, 1-Dec-83 05:54:51 EST
Organization: Microsoft Corporation
Lines: 14


The problem (no warm reboots) that people are encountering with
the Microsoft Mouse card on IBM PC-XTs has a simple cause and fix.

It seems a couple of batches of mouse cards were shipped with the
interrupt jumper on "5" rather than "2".  If you have an XT,
just move the jumper (between the 40-pin chip and the edge connector)
from "5" to "2" and the problem vanishes.

The jumper controls the interrupt level; on an XT interrupt 5
conflicts with some other hardware.  The driver software learns
which interrupt is in use during initialization, so no software
change is needed.