[Coco] High res joystick interface

[Steve Bjork]

On the CoCo 1/2 the Hi-res joystick interface will give you 0 to 319 
range and 0-639 on a CoCo 3 running in high speed mode.

The interface works better if you read it at the same time of the 
power/video cycle.  That way the interference from the monitor and power 
line does not change (jitter) the readings.  I finding doing the reading 
during the V-blank works the best.

Steve

On 4/3/2012 4:56 PM, Bill Pierce wrote:
> It uses the joy and cassette ports to create a higher resolution than the standard 64x64. A very good example of it's use is in the source code to Steve Bjork's "MOUSE.ASM" which can be found on the RTSI archives. He gives a very good breakdown of how to access it... as he designed it as well :-)
>
>
> Music from the Tandy/Radio Shack Color Computer 2&  3
> https://sites.google.com/site/dabarnstudio/
> Bill Pierce
> ooogalapasooo at aol.com
>
>
>
>
> -----Original Message-----
> From: Willard Goosey<goosey at virgo.sdc.org>
> To: CoCoList for Color Computer Enthusiasts<coco at maltedmedia.com>
> Sent: Tue, Apr 3, 2012 5:42 pm
> Subject: Re: [Coco] High res joystick interface
>
>
> On Tue, Apr 03, 2012 at 02:21:17PM -0500, Robert Hermanek wrote:
>> Question #1:  Am I right about the above?
> Nope.  It plugs into 1 joystick port and the cassette port.  It does
> ts thing in a much-more complicated fashion that I've never studied
> n depth, but hogs the cpu.
> Willard
> -
> illard Goosey  goosey at sdc.org
> ocorro, New Mexico, USA
>   search my heart and find Cimmeria, land of Darkness and the Night.
>   -- R.E. Howard
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