I still have that 6er that I've tried to A/V Mod, which I've finally finished, but here's the thing. Take, for example, Superman. The backgrounds (buildings, gap by the bridge, are all gone. In Donkey Kong, the girders are missing. E.T (don't ask, I just had it lying around), all the pitfalls are gone. Berzerk didn't have any walls.
I also noticed vertical lines missing from the characters.
Any way I can fix this? What needs to be replaced? Any help is great. Thanks!
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Atari graphics glitches, any fix?
Started by goombakid, Jun 25 2011 1:24 AM
8 replies to this topic
#2 OFFLINE
goombakid
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Combat Commando
Posted Mon Jun 27, 2011 11:21 PM
For what it's worth, when I had it running on RF, it was still missing elements from the game.
#3 OFFLINE
SoundGammon
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Moonsweeper
Posted Tue Jun 28, 2011 9:06 AM
...my guess is that you have a bad Stella chip, or one of the video summary resistors are bad...
#4 OFFLINE
goombakid
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Combat Commando
Posted Tue Jun 28, 2011 8:03 PM
SoundGammon, on Tue Jun 28, 2011 9:06 AM, said:
...my guess is that you have a bad Stella chip, or one of the video summary resistors are bad...
Well, at this point I was gonna try anything, but if the Stella chip is bad, is it worth it to try to replace it?
#5 OFFLINE
AtariLeaf
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Quadrunner
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Posted Tue Jun 28, 2011 8:17 PM
goombakid, on Tue Jun 28, 2011 8:03 PM, said:
SoundGammon, on Tue Jun 28, 2011 9:06 AM, said:
...my guess is that you have a bad Stella chip, or one of the video summary resistors are bad...
Well, at this point I was gonna try anything, but if the Stella chip is bad, is it worth it to try to replace it?
If you happen to have a spare unit that you could pull its working chip from, yes its worth a shot.
#6 OFFLINE
zylon
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River Patroller
- 5200 HSC Mod
- Location:somewhere out in space, usa
Posted Tue Jun 28, 2011 8:20 PM
That chip costs $8 new from Best Electronics.
#7 OFFLINE
goombakid
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Combat Commando
Posted Tue Jun 28, 2011 9:54 PM
AtariLeaf, on Tue Jun 28, 2011 8:17 PM, said:
If you happen to have a spare unit that you could pull its working chip from, yes its worth a shot.
I do have a Coleco Gemini that works fine. I've been planning on doing an A/V mod on it. Can anyone who owns this and has done an A/V mod for it point out the TIA? And do I assume that the pinout on the Gemini would be the same as a standard 2600?
And, as n00b as I am, could someone point out on the 6 swticher where the Stella chip lies?
#8 OFFLINE
zylon
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River Patroller
- 5200 HSC Mod
- Location:somewhere out in space, usa
Posted Wed Jun 29, 2011 6:33 PM
TIA is furthest from cart slot and RIOT(stella?) is closest to cart slot on all 2600 models. I believe Gemini is the same. 
#9 OFFLINE
goombakid
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Combat Commando
Posted Thu Jun 30, 2011 1:57 AM
http://markup.io/v/1rcryyr6fvmp TIA Location? (borrowed from another thread)
As for the 6er, I don't know. I have an Atari Flashback 2 that I wanted to cart slot mod for a while, but the only thing holding me back is the whole glitching/res (Asteroids - missing ship) problem using it on HDTVs. Other than getting a CRT TV just to play 2600 games OR reverting to emulation on the Wii or PC, is there any possible fix for that, or is that only while playing the pre loaded games on the Flashback 2?
As for the 6er, I don't know. I have an Atari Flashback 2 that I wanted to cart slot mod for a while, but the only thing holding me back is the whole glitching/res (Asteroids - missing ship) problem using it on HDTVs. Other than getting a CRT TV just to play 2600 games OR reverting to emulation on the Wii or PC, is there any possible fix for that, or is that only while playing the pre loaded games on the Flashback 2?
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