Re: Need Help with Asteroids Deluxe

Generall the text is directly aftter the self test patterns in the VROM,
can you verify the VROM images to be good. Never hurts to look for stuck
bits with a logic probe either around there. Sorta a longshot, but can
save lots of time sometimes.

SVerlander@aol.com wrote:

> In a message dated 1/31/04 5:44:17 PM Eastern Standard Time,
> jess@askey.org writes:
>
>
>>
>> It looks like the errors are not dependent on screen position as the 'N'
>> is good in both the BONUS and INC. If is was a DAC or output problem it
>> shoudl effect the self test as well. It is hard to tell from the pics
>> but are the errors consistent no matter where a same image is drawn on
>> the screen? Also, take for example the I in INC. It is being drawn as a
>> backwards C is looks like. Is this consistent anywhere there is supposed
>> to be an I? If so, I would look at the vector ROMs and maybe the data
>> buffers from them into the counters etc. Do you by chance have a bad
>> VROM error in the self test? If the game has been sitting that long,
>> maybe try cleaning all socketed IC legs in the vector section as well.
>> You may just have a bad connection on a pin somewhere.
>
>
>
> Thanks for the reply. Yes, the errors are consistent and never change
> in the text lines for the BONUS and the C R 1980 ATARI INC. They even
> stay the same when an asteroid passes under them and the asteroid
> looks fine. Also all the small asteroids look the same like their
> missing 2/3rds of the outline but the side that's left rotates like
> the asteroid should. I dough theirs anything wrong with the DAC or
> output as the test pattern is fine. I wish I knew what section
> generates the text that's messing up, guess it could be a ROM issue.
> Bet its something simple, just gotta find it.
> Thanks,
> Sam
> In Virginia

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Received on Sun Feb 1 18:55:18 2004