[Coco] CoCo Trackball

[Dan Olson]

Yea, it'd be interesting to know.  The ST just uses the 4 digital 
directions, two for X, two for Y, or at least the standard mouse does. 
Don't know if it used a 6803 internally or what though.

 	Dan


On Wed, 24 Jan 2007, Torsten Dittel wrote:

> I guess the CoCo version has a µController whiSch is interpreting the
> optical (digital) signals e.g. like the 6803 implemented in the ATARI ST
> did (at least it seems to have a power supply). It might then output a
> corresponding voltage between 0 and 5V using a DAC. This voltage goes
> directly to the CoCo's joystick port where it's AD-converted like the
> normal analog joystick. I'll tell you as soon as the unit is here. Will
> be interesting to know how many bits this DAC has: I guess the trackball
> won't work well with the CoCoMax Pak. Should be even less suitable for
> the HiRes joystick interface.
>
> Torsten
>
> Dan Olson schrieb:
>>
>> It'd have to be electrically different because the Amiga is digital
>> (though an analog trackball wouldn't work too well, so it probably doesn't
>> use the X/Y inputs?)
>>
>> On second though, I have a "color mouse" I think.  It's been a long
>> time....
>>
>>         Dan
>>
>> On Wed, 24 Jan 2007, Mark McDougall wrote:
>>
>>> Dan Olson wrote:
>>>
>>>> I've got one of these.... but does any software use it?
>>>
>>> Interesting, I have a Wico Trackball which looks identical except for
>>> the power supply input and the DIN plug - mine has a D9 'atari' style
>>> connector (no power) for use with an Amiga...
>>>
>>> Regards,
>>> Mark
>
>
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