Path: utzoo!attcan!uunet!zaphod.mps.ohio-state.edu!rphroy!cfctech!sharkey!aucis!easton
From: easton@andrews.edu (Jeff Easton)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Hacking a Microsoft mouse for the Amiga
Message-ID: <667662804wkn399@edmund.cs.andrews.edu>
Date: 27 Feb 91 13:53:24 GMT
References: <667620358wkn28203@edmund.cs.andrews.edu> <1991Feb27.061859.2533@kessner.denver.co.us>
Reply-To: easton@edmund.cs.andrews.edu.UUCP (Jeff Easton)
Distribution: na
Organization: Andrews University, Berrien Springs, Michigan
Lines: 74

In article <1991Feb27.061859.2533@kessner.denver.co.us> david@kessner.UUCP (David D. Kessner) writes:
>In article <667620358wkn28203@edmund.cs.andrews.edu> easton@edmund.cs.andrews.edu (Jeff Easton) writes:

>>  Well, I've succeeded in hacking up my Microsoft serial mouse (the
>>white dove bar one) to work on my Amiga.  It appears to need the following
>>to get it to talk to the Amiga;
>>
>>	1> removal of the uP in the Mouse
>
>Can I cringe now?

  Yes, see below.

>>	2> Add a limiting resistor for the LED's
>
>LED's?  Mouse?

  The ball touches two roller shafts for the X and Y direction.  These
shafts turn two slotted disks.  A LED emitter/detector pair read the
slots rotating by their "window".

>>  This hack is not for the faint at heart.  It requires desoldering IC's
>>and surface mount parts.  Take apart the mouse and look at the bottom of
>>board for an idea of whats involved.

>Jeff...  Did you know that the PC bus mice can be hooked up to an Amiga with
>nothing more than a 9 pin mini-din to a DB-9 connector?  No modifications to
>the mouse are needed, and will work with most bus-mice rather than just the 
>microsoft mouse.  
>
>I forgot the exact wiring for the connector (since I do not own an Amiga-- I
>gave a friend my old bus-mouse).  Here is the pin-outs for the mini-din, you
>can probably figure out the rest from there-- otherwise leave me mail:
>
>	1 -	+5v
>	2 -	X quadrature A
>	3 -	X quad B
>	4 -	Y quad A
>	5 -	Y quad B
>	6 -	Button 1
>	7 -	Button 2
>	8 -	Button 3
>	9 -	Ground
>	E -	Chassis Ground
>
>Using this arrangement makes chances of the modification working MUCH better
>since there is no internal changes that need to be done.  If a company would
>ever catch wind of this, they would make a small adapter to do this and sell it
>for $5...

  Hmmm.  3 buttons.  This wouldnt be one of the older Logitech mice,
would it?

  Your pinout looks like it has all the correct info, the Amiga needs
the XY quadrature pairs.  The only info I have is for the  Microsoft
serial mouse and I have seen the pinout for the PS/2 style mouse.  Both
of these mice have a on board microprocessor due to the "weird" interface
to the computer.  Does anybody have the pinout for the Microsoft bus
mouse?  If it puts out the quadrature pairs it would be easy.

  The serial mouse is the only one I had to play with.  My changes
basically take out the back end uP and convert it to run at 5V again.

  I'll post the details of the hack when I get a chance to write it up.


>David Kessner - david@kessner.denver.co.us            | do {



-- 
	Jeff Easton			Zenith Data Systems
	Systems Engineer		OEM Engineering
	easton@andrews.edu