[Coco] PS-2 Mouse on CoCo

[Willard Goosey]

>Date: Sun, 11 Nov 2007 09:15:52 -0800 (PST)
>From: Derek <dml_68 at yahoo.com>
>
>I am looking for pin out and a parts list for adapting a PS-2 mouse
>for use on my CoCo 3. I have a PS-2 Mouse and the DIN plug for the
>coco joystick port.
>
Many moons ago there was a guy working on a project to do this, but I
don't know what ever happened to it:

>From owner-coco at PUCC.PRINCETON.EDU  Tue Nov 16 20:12:18 1999
>Date:         Tue, 16 Nov 1999 21:11:26 -0600
>From: Dave Gacke <dgacke at LND.COM>
>Subject:      New Hardware for CoCo!
>To: COCO at PUCC.PRINCETON.EDU

>Hi all,

>I've pretty much finished tweeking my PS/2 mouse adapter for the coco. I =
>demoed it at the last GCCC meeting, hopefully someone from there is =
>interested in building one. Its a pretty simple little circuit that can =
>be wirewrapped in one evening EASY. Anyway, my intentions are to release =
>it to the public domain. I will be putting up a website (as soon as I =
>can get my ISP to cooperate) that will have schematics and sourcecode - =
>the sourcecode is for the 2 microcontrollers it uses. The whole thing =
>has a whopping 3 chips! Once I post the schematics & source, I'll put a =
>message on the list. If anyone needs the microcontrollers programmed, I =
>can do that for pretty much "cost + shipping". My intention is not to =
>make money, but to keep the ole CoCo's heart beating a bit longer....


>Dave Gacke

>(Also,  suggestions on other possible projects and modifications to this =
>one, are most welcome.)



>From owner-coco at PUCC.PRINCETON.EDU  Wed Nov 17 20:59:37 1999
>Date:         Wed, 17 Nov 1999 21:58:07 -0600
>Sender: COCO - Tandy Color Computer List <COCO at PUCC.PRINCETON.EDU>
>From: Dave Gacke <dgacke at LND.COM>
>Subject:      Re: New Hardware for CoCo!

>It basically simulates the high res joystick adapter.  It plugs into the
>same ports (cassette, rt. joystick) and you plug the ps/2 mouse into it,
>instead of the Tandy one. Basically the high res mouse adapter had 2 timers
>in it. they were reset by a signal that comes out of the cassette port. The
>old Tandy mouse has 2 potentiometers in it that makes the R   in the RC
>timing circuit.  I just simulate the whole thing with a pair of
>microcontrollers. One to read, and keep track of mouse position, and one to
>keep track of the timers.  The only other chip is the LM339, it just
>converts the voltage level of the signal coming out of the cassette port to
>a standard logic voltage level. It proves to be very accurate in testing so
>far. I still have a couple minor tweaks to make, but should be complete
>probably by tomorrow.  Now I just need to give my ISP a swift kick and make
>them set up my web space.  I'll badger them about it tomorrow....


>Oh, heres a quick run down of the component list.  I'll have an exact list
>on the site.

>2 Microchip PIC 16c505 microcontrollers   (about 2 bucks each)
>1 14 MHz crystal
>1 LM339 quad comparator
>4 resistors (10k-47k)
>1 100k pot
>1 cassette port DIN male connector
>1 joystick port DIN male connector
>1 PS/2 mouse port female connector

>If you wire wrap, you should be able to do it connectors and all for about
>15 bucks.
>I'll program microcontrollers for people for 3 bucks each plus shipping.
>Like I said, I'm not in it for the money.

>Dave Gacke

Now you know as much as I do.

Willard
-- 
Willard Goosey  goosey at sdc.org
Socorro, New Mexico, USA
"I've never been to Contempt!  Isn't that somewhere in New Mexico?"
   --- Yacko