Re: TI-H: re: mouse interface

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: re: mouse interface
From: Visti Andresen <talpa@mip.ou.dk>
Date: Wed, 28 Oct 1998 18:10:37 +0100
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <v04020a02b25cfb34623a@[192.168.1.66]>
Organization: IRIS
Reply-To: ti-hardware@lists.ticalc.org

On 28-Oct-98, Grant Stockly wrote:
> 
> Most mice are serial.  I'm not sure if a mouse like you describe actually
> exists...  :\
> 
> Grant

I'm believe that even a PC mouse contains "quadrature" signals (line A and
line B is out of phase by 90°)...

they look something like this:           

     (G)     here the mouse changes direction

line A 000001111110000011110000011111000001111G1111111000000001111110000011111
line B
000111110000111111000011111000001111100000111111100001111100000111111000

if you then connect line A to a bidirectional counters clock input (triggering
on changes)
and connect line B to the direction input it will count up if you move the
mouse
in one direction and down in the other direction...  (there are naturally two
line for up/down and two for left/right)
(in PC mice this data is transformed into serial data)

> 
> 
>> To put a mouse interface in a ti-86 you could try putting connections to
>> all of the arrow keys, and enter and 2nd, or whatever, thenmodify a mouse
>> s that moving it just closes the switches.
>> 
>> 
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-- 
Greetings from Visti Andresen (talpa/IRIS)
     May the AMIGA be with you.
  http://www.mip.ou.dk/~talpa

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References:

Re: TI-H: re: mouse interface

From: Grant Stockly <gussie@alaska.net>