Re: Asteroids Deluxe

After messing around a bit more with this tonight. It seem like it's related
to the 2n3906 transistors used for the inverting of x and y.

Hitting the same yet singular circuit on an asteroids board doesn't produce
the same results. I say singular, because on the AD board it uses two
separate circuits for x and y as opposed to using only one for both.

I did swap out the transistors from the Asteroids to the AD, with no change.
So perhaps it's in the way the circuit is wired, or the fact that there are
two circuits.

Very odd

Kevin

On Thu, Feb 24, 2011 at 8:16 PM, Kevin Moore <talon.k@gmail.com> wrote:

> @Teeray Yeah that's what I was thinking. But sofar no go.
>
> @Torin Yep that's what it looks like when it's warming up. However I don't
> think Big Blue is going to cure this. I'm using my Pat9000 to test this, and
> an Asteroids Cab. Both of which have had those caps replaced.
>
> But definately a good video showing what it looks like when warming up. The
> boards I'm looking at though take a good 2-5 mins to even get to that point.
> Once there is video the output voltages are within normal ranges and won't
> cause monitor damage. But before then it's sending out to much voltage.
>
> Kevin
>
>
>
> On Thu, Feb 24, 2011 at 7:43 PM, Torin Newman <torinnewman@gmail.com>wrote:
>
>> My AD did something similar when I just got it. In the cold garage, I
>> had a lot of distortion and collapsed video until it warmed up a bit then it
>> was fine. Below is a link with a youtube video and shows it returning to
>> normal at about 0:17. Replacing big blue fixed the problem. Check the
>> video link to see if your machine has the same symptoms.
>>
>>
>> https://sites.google.com/site/3vmearcade/Home/asteroids-deluxe---atari-1980
>>
>>
>>
>>
>> On 2/24/2011 5:38 PM, teeray wrote:
>>
>> Commercial IC's are rated down to 0 degrees C 32F
>> As log as temp is above 32F it should work.
>>
>> -----Original Message-----
>> From: Kevin Moore
>> Sent: Feb 25, 2011 9:49 PM
>> To: vectorlist@vectorlist.org
>> Subject: VECTOR: Asteroids Deluxe
>>
>> Working on a board for someone.
>>
>> The problem they have with it, is this.
>>
>> Game is in Garage.
>> Garage Temp is between 35-50 degree F
>> Turn game on, and burns up monitor.
>>
>> Basically the output voltage on x and y when the board is cold is around
>> 10-14v
>> Depending on how cold determines how long it takes for the output
>> to stabilize and return to normal.
>>
>> However if board temp is above 50 degrees F everything works fine.
>>
>> I've tried cold spray trying to find a non cold friendly chip, but it
>> seems pretty much everything pre Dac affects it.
>>
>> I'm kinda at a loss to figure out why the board does this. I've tried
>> other AD boards, and they act the same, so I'm wondering if that's normal
>> behavior. Never had to deal with a cold board problem before.
>>
>> Kevin
>>
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>>
>

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Received on Thu Feb 24 23:48:38 2011