[Techtoolslist] Kurz Kasch test fixture cards on eBay

[Matthew Rossiter]

Hi Andy,

Do you have any documentation on your PIC micro controller setup? That 
would sure be handy as I have about 4 Atari Basketball boardsets that I 
need to get working.  Well, actually I have 1 down, 3 to go.

thanks!

Matt

On 2/19/2015 9:24 AM, Andrew Welburn wrote:
> years ago i actually built a joystick interface for missile command 
> with a couple of 555's . I found it was possible to simply pull the 
> DIR input high or low to choose your direction and pulse the CLK input 
> on each axis with a 555. This worked in u/d/l/r direction, but when 
> you went diagonal, the cursor would shoot off in the opposite 
> direction. Never quite figured out why, but i was cheating to make it 
> work anyway so it was not a surprise it didn't entirely work.
>
> It was crude, but it allowed me to usefully test missile command PCBs 
> enough to fix them on my bench.
>
>  These days i use a PIC microcontroller i programmed that properly 
> translates a digital joystick input in to all types of trakball and 
> spinner outputs. Different games count the controllers at different 
> rates, so i've also got a pot that adjusts the speed of the output 
> signals so that all games are playable (for adequate testing purposes 
> only). Its all mounted into my testrig :)
>
> Andrew Welburn
> http://www.andys-arcade.com
>
> On 18/02/2015 21:30, John Robertson wrote:
>> On 02/18/2015 7:02 PM, Matthew Rossiter wrote:
>>> I bought a set for Atari Tank only to find out I already have it. :)
>>>
>>> I notice Kurz Kasch never made a set of cards for Atari Basketball
>>> AFAIK so I made a pretty nice little rig using a variac to control the
>>> input voltage.   I just need to make a simple 555 timer - duty cycle
>>> circuit like they have to mimic the trackball in other games so that I
>>> don't have to hunt down a 4.5 inch trackball.  Anybody got a schematic
>>> I can use?
>>>
>>> Matt
>>>
>> Don't you need two pulsing signals for each axis? Rotation and
>> direction? How can you do that with a single 555 timer? Seems to me you
>> would need a dual timer with an offset depending on which direction you
>> want to 'go'.
>>
>> Or am I missing something?
>>
>> The Atari CTS-1 used a dual opto spinner for this sort of thing.
>>
>> John :-#)#
>>>
>>> On 2/18/2015 4:16 PM, John Robertson wrote:
>>>> Coinopwarehouse has about 75 cards up for sale. I bought a few, and
>>>> they are in good condition. Lloyd said most didn't come with
>>>> documents, but he does include what he has. He will combine ship too.
>>>>
>>>> Worth looking at if you are rounding out your collection or want to
>>>> trade with me sometime...
>>>>
>>>> stores.ebay.com/coinopwarehouse?_dmd=1&_nkw=kurz
>>>>
>>>> John :-#)#
>>>>
>>>
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>>
>>
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