jerrykurtz Posted September 20, 2004 Share Posted September 20, 2004 My brother, Jeff Kurtz, which does a ton of Neo-Geo mods, has co-developed an RGB to Componet/S-Video/Composite board. There's some basic information at www.neobitz.com (look in the header for link). The picture quality coming out of this thing is nothing short of fantastic! The way they've designed it, it can be wired to quite a few different devices other than the NEO -- pretty much anything with RGB signals (Jaguar for example). Personally, I don't know the techincal details of whether a 2600 / 7800 / 5200 has these signals, but if they do, then this should work. You can send him some emails if you need more details. Jerry Quote Link to comment Share on other sites More sharing options...
Bruce Tomlin Posted September 20, 2004 Share Posted September 20, 2004 The picture quality coming out of this thing is nothing short of fantastic! The way they've designed it, it can be wired to quite a few different devices other than the NEO -- pretty much anything with RGB signals (Jaguar for example). Personally, I don't know the techincal details of whether a 2600 / 7800 / 5200 has these signals, but if they do, then this should work. That's nice, but the 2600 and 7800 don't use RGB. They use chroma/luma, which is more commonly known as S-video. And to make things really annoying, they mix 'em together by tying together everything after the luma D/A resistor ladder, so you have to add your own resistor ladder and luma amp. The Colecovision uses composite (Y, R-Y, B-Y) internally, and has a tap point where the R-Y and B-Y have been mixed to chroma. All of these signals need to be amplified. Quote Link to comment Share on other sites More sharing options...
Rob Mitchell Posted September 21, 2004 Share Posted September 21, 2004 Dangit! I need an S-video for my 7800 now! Any idea when this new custom 7800 video interface will be availaible? Rob Mitchell, Atlanta, GA Quote Link to comment Share on other sites More sharing options...
+johnnywc Posted September 21, 2004 Author Share Posted September 21, 2004 Dangit! I need an S-video for my 7800 now! Any idea when this new custom 7800 video interface will be availaible? Rob Mitchell, Atlanta, GA Double Dangit!!! I have my 7800 set up with the CC2, but the video is terrible... I have my 2600 with the Cybertech S-Video set up but I have to swap carts.... Tempest - any news on that prototype that was installed in your 7800? Any details? This RF is killing me!!!! HELP!!!! Quote Link to comment Share on other sites More sharing options...
GamebaseST Posted October 8, 2004 Share Posted October 8, 2004 I second that, I've just got lucky and got myself a CC2 and need S-Video for a 7800. I don't have a 7800 yet and had problems with the Cybertech board in a UK 2600 so ended up getting an NTSC console which did the trick. So I wonder if I would be better off getting a 7800 from the US as well. Quote Link to comment Share on other sites More sharing options...
Buck Posted November 23, 2004 Share Posted November 23, 2004 Triple Dangit!! I still await the 7800 mod. Tempest?? CWilkson? Quote Link to comment Share on other sites More sharing options...
Beer Monkey Posted November 23, 2004 Share Posted November 23, 2004 I've got a CC2, and I'm just dying for s-video. Will pay for a quality mod. Quote Link to comment Share on other sites More sharing options...
bjk7382 Posted November 23, 2004 Share Posted November 23, 2004 I would also like an easy to install S-video mod for the 7800. I hope we get some sort of word if this is actually being worked on or not. Quote Link to comment Share on other sites More sharing options...
Albert Posted November 23, 2004 Share Posted November 23, 2004 Triple Dangit!! I still await the 7800 mod. Tempest?? CWilkson? An easy to install modification for the 7800 would be very welcome, and I'd probably purchase two of them myself. I've already modified six 2600 systems and three 5200 systems in such fashion (ColecoVision is next!) ..Al Quote Link to comment Share on other sites More sharing options...
Tempest Posted November 23, 2004 Share Posted November 23, 2004 Triple Dangit!! I still await the 7800 mod. Tempest?? CWilkson? I've been told that the boards are ready and will be assembled soon. My 7800 is going to be the first test unit. I'll let everyone know how it works soon. Tempest Quote Link to comment Share on other sites More sharing options...
Albert Posted November 23, 2004 Share Posted November 23, 2004 Triple Dangit!! I still await the 7800 mod. Tempest?? CWilkson? I've been told that the boards are ready and will be assembled soon. My 7800 is going to be the first test unit. I'll let everyone know how it works soon. Excellent to hear. ..Al Quote Link to comment Share on other sites More sharing options...
Danno Posted December 9, 2004 Share Posted December 9, 2004 Any Idea what the price will be, so I know how much to set aside? Quote Link to comment Share on other sites More sharing options...
8bitdomain Posted December 28, 2004 Share Posted December 28, 2004 I am posting the final layout of the Atari 7800 mod board by 8bitdomain.com Boards are in pre-production, first 3 will be available on Jan 10 additional 50 boards will follow on Jan 31. This is the Final artwork (pcb layout) as you can see it is very small 2.3" X 1.2" and uses all SMT parts. I will post install photos and install docs when available. Estimated price is approx. $35. Quote Link to comment Share on other sites More sharing options...
bjk7382 Posted December 28, 2004 Share Posted December 28, 2004 So this will be a simple to install mod, right? (I hope) Quote Link to comment Share on other sites More sharing options...
+Mitch Posted December 28, 2004 Share Posted December 28, 2004 So this will be a simple to install mod, right? (I hope) I'm guessing you will need to socket your TIA and MARIA chips if they are soldered in (not for the soldering novice). Unfortunately about 75% of the 7800s have them soldered in. Though, I don't see any place for pass-through sockets on that PCB. Maybe it will use the "solder to the resistors" method. I guess we'll just have to wait and find out. Mitch Quote Link to comment Share on other sites More sharing options...
8bitdomain Posted December 28, 2004 Share Posted December 28, 2004 Actually no, you don't need the Maria & TIA to be socketed. All that is needed is to remove U3 (14pin dip) and replace with a socket, after that you solder 4 wires to individual resistors on the 7800 pcb. All other cables and connectors come pre-soldered and ready to install. I tried to keep the soldering to an absolute mininum, but because of the way that the Maria & TIA are interconnected this was the easiest way I found to do it. Quote Link to comment Share on other sites More sharing options...
bjk7382 Posted December 28, 2004 Share Posted December 28, 2004 Actually no, you don't need the Maria & TIA to be socketed. All that is needed is to remove U3 (14pin dip) and replace with a socket, after thatyou solder 4 wires to individual resistors on the 7800 pcb. All other cables and connectors come pre-soldered and ready to install. I tried to keep the soldering to an absolute mininum, but because of the way that the Maria & TIA are interconnected this was the easiest way I found to do it. Desoldering a 14 pin dip isn't that bad. I can do simple soldering, but for some reason I can't read schematics or do complex stuff like breadboard prototyping. I just leave all of that to the experts. I am sure most people that want to install this mod is comfortable doing a little bit of soldering, as long as there are clear readable instructions. Quote Link to comment Share on other sites More sharing options...
Laner Posted December 28, 2004 Share Posted December 28, 2004 I am posting the final layout of the Atari 7800 mod board by 8bitdomain.comI will post install photos and install docs when available.[/quote I trust the install docs will be better than the 5200 mod? Quote Link to comment Share on other sites More sharing options...
8bitdomain Posted January 4, 2005 Share Posted January 4, 2005 Since this mod requires soldering, the installation docs WILL be more detailed. The 5200 mod was so simple (at least for 99% of the buyers) to install, the instructions for that system were kept to a minimum. Mike Quote Link to comment Share on other sites More sharing options...
DracIsBack Posted January 4, 2005 Share Posted January 4, 2005 Geez - not all of us have a skill set when it comes to electronics! :-) I couldn't even extract the POKEY from my Ballblazer cart without breaking both the POKEY and the board! Quote Link to comment Share on other sites More sharing options...
PacManPlus Posted January 4, 2005 Share Posted January 4, 2005 Hi! I am looking forward to this product with great anticipation... Especially if you are able to keep the $35 price point mentioned earlier! Quote Link to comment Share on other sites More sharing options...
Bruce Tomlin Posted January 4, 2005 Share Posted January 4, 2005 At least if this goes where I think it goes, it won't get in the way of my standard BIOS EPROM mod where I piggyback a 7404 on the next chip to the right. I looked at a 7800 board the other day, and those two chips are pretty close to each other. Quote Link to comment Share on other sites More sharing options...
gulag picture radio Posted January 6, 2005 Share Posted January 6, 2005 What does the BIOS mod get you? I've never heard of that mod on a 7800. I've seen something like that in action on a Colecovision to circumvent the long log screen time. What does te 7800 one do? Quote Link to comment Share on other sites More sharing options...
+Mitch Posted January 6, 2005 Share Posted January 6, 2005 What does the BIOS mod get you? I've never heard of that mod on a 7800. I've seen something like that in action on a Colecovision to circumvent the long log screen time. What does te 7800 one do? Turns the 7800 into a cartridge dumper. Mitch Quote Link to comment Share on other sites More sharing options...
gulag picture radio Posted January 6, 2005 Share Posted January 6, 2005 No way! That's wicked cool! SO once the data is pulled fdown from the cart, where does it go? Does it have a line that copies it to a PC or something? I hope that this isn't too remedial a question... I'm just insanely curious. Quote Link to comment Share on other sites More sharing options...
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