walter_J64bit Posted August 18, 2014 Share Posted August 18, 2014 (edited) Hi all, Ive just replace my dysfunctional 7800 with an other 7800, so I'd installed an A/V mod now I cant play Rip Off all my other 7800/2600 games run just fine, Ive got great sound and video. I'm using this A/V mod http://www.ebay.com/itm/Atari-2600-7800-Composite-Video-Mod-Upgrade-Kit-DIY/300592126324?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D24902%26meid%3D15b1f222d8ca4760944529ae1929ef53%26pid%3D100033%26prg%3D10502%26rk%3D4%26rkt%3D4%26sd%3D191272176565 So I'd pop Rip Off in my dysfunctional 7800 it works but Im not trying to use that 7800 it has sound issues. I'm not having any luck with 7800's Edited August 18, 2014 by walter_J64bit Quote Link to comment Share on other sites More sharing options...
AtariBrian Posted August 18, 2014 Share Posted August 18, 2014 I highly recommend using one of Electronicsentimentalities boards . Although I dont see one on ebay right now you can always contact him . 1 Quote Link to comment Share on other sites More sharing options...
Trebor Posted August 18, 2014 Share Posted August 18, 2014 I highly recommend using one of Electronicsentimentalities boards . Although I dont see one on ebay right now you can always contact him . http://www.electronicsentimentalities.com/Assembled%20Mods.html Quote Link to comment Share on other sites More sharing options...
RevEng Posted August 18, 2014 Share Posted August 18, 2014 Ive just replace my dysfunctional 7800 with an other 7800, so I'd installed an A/V mod now I cant play Rip Off all my other 7800/2600 games run just fine, Ive got great sound and video. I'm using this A/V mod [...] Rip Off doesn't play at all? Do you see the rainbow atari bios screen? What are the symptoms? The AV mod shouldn't affect one particular game working or not. Without more detail I'd guess the problem isn't with the mod but with that deck itself, and this particular cart just happens to be more susceptible to than other games you've tried . i.e. dirty contacts, marginal chip, ... Quote Link to comment Share on other sites More sharing options...
walter_J64bit Posted August 18, 2014 Author Share Posted August 18, 2014 Rip Off doesn't play at all? Do you see the rainbow atari bios screen? What are the symptoms? The AV mod shouldn't affect one particular game working or not. Without more detail I'd guess the problem isn't with the mod but with that deck itself, and this particular cart just happens to be more susceptible to than other games you've tried . i.e. dirty contacts, marginal chip, ... Yep, I do get the rainbow screen and after that the screen goes black, there's no sound. The game shouldn't have dirty contacts, I've only had the game for week or two it's kepted in the bag that the game came with. Quote Link to comment Share on other sites More sharing options...
RevEng Posted August 19, 2014 Share Posted August 19, 2014 Did this deck play the cart fine prior to modding? 7800 decks are pretty quirky from revision to revision. Quote Link to comment Share on other sites More sharing options...
walter_J64bit Posted August 19, 2014 Author Share Posted August 19, 2014 (edited) Did this deck play the cart fine prior to modding? 7800 decks are pretty quirky from revision to revision. Rip Off is the one game I didn't try before the mod but it play Double Dragon and Robot Tank just fine. Edited August 19, 2014 by walter_J64bit Quote Link to comment Share on other sites More sharing options...
RevEng Posted August 19, 2014 Share Posted August 19, 2014 I'm pretty sure the problem is with the deck, not the mod. The video mod simply taps the signal from a certain part of the board and amplifies it. There just isn't much potential of it messing up one game but not others. Quote Link to comment Share on other sites More sharing options...
walter_J64bit Posted August 19, 2014 Author Share Posted August 19, 2014 I'm pretty sure the problem is with the deck, not the mod. The video mod simply taps the signal from a certain part of the board and amplifies it. There just isn't much potential of it messing up one game but not others.It's odd but I think your right , now if I can get the dysfunctional 7800 fixed then I play Rip Off. Quote Link to comment Share on other sites More sharing options...
Greg2600 Posted August 19, 2014 Share Posted August 19, 2014 Have you tried fiddling with the difficulty switches on the front? There have been some 7800 homebrew that won't work with certain config. Quote Link to comment Share on other sites More sharing options...
Jinks Posted August 20, 2014 Share Posted August 20, 2014 Never heard of 7800 homebrew not working with difficulty switches. Quote Link to comment Share on other sites More sharing options...
Greg2600 Posted August 20, 2014 Share Posted August 20, 2014 Yes, Crazy Brix didn't work if they were set in one direction. At least the one on that 30th anniversary cart. Quote Link to comment Share on other sites More sharing options...
Trebor Posted August 20, 2014 Share Posted August 20, 2014 Yes, Crazy Brix didn't work if they were set in one direction. At least the one on that 30th anniversary cart. "Didn't work" respecting if you do not have the difficulty switches set properly according to the controllers you wish to utilize, your player/paddle would not respond. Both the stand alone and the 30th Anniversary multi-cart function exactly the same. You could still start a game, hearing the begin game audio tune and video graphics would of course be present as well; but you will not be able to launch the ball(s) or move the paddle if the controls you are trying are not hooked up properly and/or the difficulty switches are not set accordingly. For the record regarding Crazy Brix: Joystick plugged into port 1. Paddles plugged into port 2. Left difficulty switch in the left position = Paddles work Left difficulty switch in the right position = Joystick works There is no homebrew that exhibits this kind of behavior or provides this result, conditional of difficulty switch positioning: ...I do get the rainbow screen and after that the screen goes black, there's no sound... Quote Link to comment Share on other sites More sharing options...
walter_J64bit Posted August 20, 2014 Author Share Posted August 20, 2014 Have you tried fiddling with the difficulty switches on the front? There have been some 7800 homebrew that won't work with certain config.I know that Tower Toppler freaks out when difficulty switches aren't set. I'll try that out in morning. Quote Link to comment Share on other sites More sharing options...
Trebor Posted August 20, 2014 Share Posted August 20, 2014 I know that Tower Toppler freaks out when difficulty switches aren't set. I'll try that out in morning. Tower Toppler will keep circulating/skipping the different levels if the right difficulty switch is in the left position. If the right difficulty switch is in the right position it stops skipping through the levels. This can be done at any point once the game is started. There is no difficulty switch position (for any retail or as mentioned homebrew game) that provides the following result: ...I do get the rainbow screen and after that the screen goes black, there's no sound... Time would be better spent looking elsewhere for the problem(s). Difficulty switch setting is not the issue. Quote Link to comment Share on other sites More sharing options...
Trebor Posted August 20, 2014 Share Posted August 20, 2014 The only thing I could dig up at the moment with similar symptoms is here: http://atariage.com/forums/topic/119633-pal-carts-in-an-ntsc-7800-system/?do=findComment&comment=1444608...It's the result of having some sort of PAL/NTSC mismatch, but that does not seem to be applicable in this case. Possible the encryption checking is screwed up/'choking' (?), or has anyone's Maria chip ever gone "bad" Quote Link to comment Share on other sites More sharing options...
Trebor Posted August 20, 2014 Share Posted August 20, 2014 I don't know how much time you want to spend on this issue...but with a little patience, eBay yields console/deck only BINs between $20-40 tested/working. Some very recent examples include: August 4: http://www.ebay.com/itm/Atari-7800-Black-Console-NTSC-/271565539349?pt=Video_Games&hash=item3f3a914815 3 working consoles (Sold individually) @ $20 each July 29: http://www.ebay.com/itm/ATARI-7800-PRO-SYSTEM-REPLACEMENT-CONSOLE-ONLY-NTSC-/111414984301?pt=Video_Games&hash=item19f0d9be6dConso Console only $33.59 August 2: http://www.ebay.com/itm/Atari-7800-Black-Console-Only-NTSC-Broken-Pins-on-Cart-Port-Works-/161356296689?pt=Video_Games&hash=item259195b1f1 Console only $25.99 works but you would want to swap the cartridge slot from one of your console with the pins still present. There are listings too for consoles 'untested/unknown' that cosmetically appear great; however, I would not recommend them without knowing for sure they work without issue. Quote Link to comment Share on other sites More sharing options...
walter_J64bit Posted August 20, 2014 Author Share Posted August 20, 2014 (edited) Thanks Trebor I was thinking if I replace the sound chip on my dysfunctional 7800 that might do the trick but I don't know which chip it is on the motherboard. Back to my other 7800, Ok difficulty switch didn't do any thing. Edited August 20, 2014 by walter_J64bit Quote Link to comment Share on other sites More sharing options...
FireTiger Posted August 21, 2014 Share Posted August 21, 2014 Try to figure out which revision your two decks are-I have one that refuses to display Choplifter for more then 30 seconds (or crossing the neutral zone) -One that seems to hate pokey chips (blank screen often rolling or stuck sound)and one that plays nice but had a bad power cord (fixed now)Good luck. Quote Link to comment Share on other sites More sharing options...
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