TITLE:  TF2230 - Patch for m320 mouse driver

README FOR:  TF2230

PRODUCT AND VERSION:    

SCO UnixWare 2.01, SCO UnixWare 2.02, SCO UnixWare 2.03


Installation Instructions:  

DATATYPE: datastream

1.  Download the tf2230.Z and tf2230.txt files to the /tmp directory
    on your machine.

2.  Read the release notes contained in this file and follow the 
    instuctions to add the package to your system.

3.  Now become root, uncompress the file and add the package to your 
    system using the following commands:

        $ su
        # uncompress /tmp/tf2230.Z
        # pkgadd -d /tmp/tf2230


Abstract
--------

The mouse pointer on an IBM Thinkpad exhibits the "mad mouse syndrome".

Symptom
--------

The problem occurs only occasionally, and may be triggered by
inadvertant touching of more than one key at a time (CTRL key
held down while the mouse pointer is being moved). As a result,
the mouse goes "mad", and is all over the screen at the slightest
touch, even simulating button presses (menus popping up etc.)


SOLUTION SPECIFICS
------------------

General Description.
-------------------

The mouse input is recognized by three byte sequece. The first
byte is the button, sign and overflow state , second is the 
X-coordinate and third is the Y-coordinates. There is
a bit in the first byte that is always marked as set. We
check for this bit and if it is clear, we reset the mouse.


New Features.
------------

None

Software Notes and Recommendations.
----------------------------------

This PTF can be installed on UnixWare 2.01 thru 2.03 systems.
Testing of the modified software contained in this package has
been conducted only to the extent necessary to confirm that it
resolves the problem(s) stated above ("Symptom").  Such testing
consists of recreating the problem conditions (typically in a
SCO test laboratory) and verifying that the problem no longer
occurs.  No other testing of this software has been done.

Hardware Notes and Recommendations.
----------------------------------

This PTF is targeted for the i386, i486 and Pentium CPU's.