🚀 go-pugleaf

In article <1881@aramis.rutgers.edu>, knutsen@aramis.rutgers.edu (Mark Knutsen) writes:
> In article <238@ur-tut.UUCP> mcli@ur-tut.UUCP (Maurice Ling) writes:
> 
> > I am interested in getting instructions to convert an atari 8-bit trackball
> > to act like a mouse on the ST.
>   
> This is probably a hopeless cause, because the 8-bit trackball
> emulates a joystick, not a mouse.  That is, it only gives information
> on absolute direction, not speed of movement.

I think, though, that the joystick emulation involves putting EXTRA stuff
into a standard trackball. If the trackball provides quadrature signals
as its basic output, as most do, then that can be put through a couple
of chips to look like the switch closure of a joystick. By removing the
extra junk, and getting down to the quadrature level, you should be
able to use the ball as a mouse. Didn't I see instructions to do that
very thing on the net about a year ago?
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