crash Posted May 27, 2006 Share Posted May 27, 2006 Greetings, I am just wondering if Pitfall II is supposed to work on the 7800. My cartridge works fine on a 2600, but not at all on the 7800. Thanks! 1 Quote Link to comment Share on other sites More sharing options...
8th lutz Posted May 27, 2006 Share Posted May 27, 2006 (edited) It is supposed to work. I have a later version of the 7800. I got one in 1989 and one in 1990. Edited May 28, 2006 by 8th lutz 1 Quote Link to comment Share on other sites More sharing options...
Shawn Posted May 28, 2006 Share Posted May 28, 2006 It's your version of the 7800 that is making it not play. Look up on google "C-64 ATARI 7800 resisitor mod" and you will be set. 2 Quote Link to comment Share on other sites More sharing options...
Feralstorm Posted May 28, 2006 Share Posted May 28, 2006 Works fine on both my 7800s, though it takes a lot shoving to make sure it's seated well enough to work properly. 1 Quote Link to comment Share on other sites More sharing options...
Shawn Posted May 28, 2006 Share Posted May 28, 2006 Works fine on both my 7800s, though it takes a lot shoving to make sure it's seated well enough to work properly. That has nothing to do with the problem. It is a technical issue as I have mentioned above. Quote Link to comment Share on other sites More sharing options...
SteveW Posted May 28, 2006 Share Posted May 28, 2006 My two copies never worked on my good ol' 7800, although i've yet to try out my recently bought 7800 to see if they work on it. 1 Quote Link to comment Share on other sites More sharing options...
Inky Posted May 28, 2006 Share Posted May 28, 2006 I have one of the early 7800's in which the Activision games work fine on it. No gurantees on older version. I suggest looking up the mod as mentioned above. 1 Quote Link to comment Share on other sites More sharing options...
Danno Posted May 29, 2006 Share Posted May 29, 2006 Works fine on both my 7800s, though it takes a lot shoving to make sure it's seated well enough to work properly. That has nothing to do with the problem. It is a technical issue as I have mentioned above. The resistor mod has nothing to do with Pitfall II. Never has. The Activision games that are problematic for a scant few 7800's due to the timing resistor Atari put in for 2600 Dark Caverns are Robot Tank, Space Shuttle, and The Activision Decathlon. Pitfall II frequently has a cartridge seating problem on the 7800 though. Especially on the later "cheaper" 7800's that used a more narrow cartridge cup/mobo-sheild. 1 Quote Link to comment Share on other sites More sharing options...
shadow460 Posted May 29, 2006 Share Posted May 29, 2006 All of my Activision games were a very difficult fit until I modded the cart sleeve. I've got a third generation 7800, and Pitfall II works fine on that. 1 Quote Link to comment Share on other sites More sharing options...
sportznutt38 Posted June 2, 2006 Share Posted June 2, 2006 It works just fine on my 7800. 1 Quote Link to comment Share on other sites More sharing options...
envytomdead2 Posted October 2, 2020 Share Posted October 2, 2020 I recently picked up a Pitfall 2. It doesn't work on either of 7800s. One is a 87 with an expansion port and the other is a 88 without one. The best I get is screen rolling but its very hard to even get it to that point. I also have the 2600 lock on adapter so seating isn't really issue. I wonder if it's the cart or my 7800s. 1 Quote Link to comment Share on other sites More sharing options...
+Mitch Posted October 2, 2020 Share Posted October 2, 2020 Have you tried it on a 2600 to verify that it works? Mitch 1 Quote Link to comment Share on other sites More sharing options...
+Karl G Posted October 2, 2020 Share Posted October 2, 2020 Have you tried cleaning the cart contacts with alcohol and a q-tip? 1 Quote Link to comment Share on other sites More sharing options...
+-^CrossBow^- Posted October 2, 2020 Share Posted October 2, 2020 41 minutes ago, envytomdead2 said: I recently picked up a Pitfall 2. It doesn't work on either of 7800s. One is a 87 with an expansion port and the other is a 88 without one. The best I get is screen rolling but its very hard to even get it to that point. I also have the 2600 lock on adapter so seating isn't really issue. I wonder if it's the cart or my 7800s. Not positive on the '87 unit but your '88 unit likely has the extra timing circuit that was mentioned a bit further up in this thread. It is listed as a resistor but is actually a banded ceramic capacitor. Just have to clip one of the legs off that capacitor to disable that part of the circuit and restore several of the troublesome Activision games that didn't work, back to working status again. Assuming the cartridge port and games are cleaned and making good contact still. 1 Quote Link to comment Share on other sites More sharing options...
NinjaWarrior Posted October 2, 2020 Share Posted October 2, 2020 I didn't even know Pitfall II didn't work on the 7800 Have to check it when my Genesis to 7800 PSU Adapter comes from CrossBow gets here 1 Quote Link to comment Share on other sites More sharing options...
nadir Posted October 2, 2020 Share Posted October 2, 2020 Pitfall II worked on my 7800, but I already had done the Robot Tank mod before I even tried it, so not sure if it would have worked natively. 1 Quote Link to comment Share on other sites More sharing options...
envytomdead2 Posted October 3, 2020 Share Posted October 3, 2020 9 hours ago, -^CrossBow^- said: Not positive on the '87 unit but your '88 unit likely has the extra timing circuit that was mentioned a bit further up in this thread. It is listed as a resistor but is actually a banded ceramic capacitor. Just have to clip one of the legs off that capacitor to disable that part of the circuit and restore several of the troublesome Activision games that didn't work, back to working status again. Assuming the cartridge port and games are cleaned and making good contact still. Is this something a noob could do? It sounds straight forward. 1 Quote Link to comment Share on other sites More sharing options...
7800JAGFAN Posted October 3, 2020 Share Posted October 3, 2020 If its rolling or black and white, you may be surprised to find you have a PAL Pitfall 2. I have 6 7800's early to late and they all work with Pitfall 2, I had a problem like that with Crash Dive and it was a US seller, but indeed a PAL game, got a NTSC cart and it worked just fine. 1 Quote Link to comment Share on other sites More sharing options...
envytomdead2 Posted October 5, 2020 Share Posted October 5, 2020 On 10/2/2020 at 3:19 PM, Mitch said: Have you tried it on a 2600 to verify that it works? Mitch I have not. I don't currently have one. On 10/3/2020 at 2:13 AM, 7800JAGFAN said: If its rolling or black and white, you may be surprised to find you have a PAL Pitfall 2. I have 6 7800's early to late and they all work with Pitfall 2, I had a problem like that with Crash Dive and it was a US seller, but indeed a PAL game, got a NTSC cart and it worked just fine. I bought it at a local shop. It could just be the cartridge. I have gotten bad carts from them before. That's why I was wanting to see if there was a know issue. 1 Quote Link to comment Share on other sites More sharing options...
envytomdead2 Posted October 5, 2020 Share Posted October 5, 2020 On 10/2/2020 at 5:08 PM, nadir said: Pitfall II worked on my 7800, but I already had done the Robot Tank mod before I even tried it, so not sure if it would have worked natively. How difficult is the mod? Is there documentation? 1 Quote Link to comment Share on other sites More sharing options...
+-^CrossBow^- Posted October 5, 2020 Share Posted October 5, 2020 No official instructions but I did detail the quick mod in a video here if it helps at all? 4 Quote Link to comment Share on other sites More sharing options...
envytomdead2 Posted October 5, 2020 Share Posted October 5, 2020 4 hours ago, -^CrossBow^- said: No official instructions but I did detail the quick mod in a video here if it helps at all? Yes that is very helpful! Thank you! Quote Link to comment Share on other sites More sharing options...
envytomdead2 Posted October 6, 2020 Share Posted October 6, 2020 I opened up my '88 which is UAV modded. I was having difficulty getting the rf shield so I shined a flash light and saw that the c64 was indeed clipped which I thought might be the case because dark chambers does not work. I am leaning towards it might be the Pitfall 2 cart now. There are a few 2600 games that work on my 87 but not my 88 - Dark Chambers, Kung-Fu Master, Gravitar and Double Dragon. Kung-Fu Master, Gravitar and Dark Chambers are all black screen. Double Dragon keeps resetting itself once it starts playing. I am wondering if that timing circuit affects more than just Dark Chambers on certain runs of the 7800? The Double Dragon issue really makes think that is the case. Quote Link to comment Share on other sites More sharing options...
+-^CrossBow^- Posted October 6, 2020 Share Posted October 6, 2020 54 minutes ago, envytomdead2 said: I opened up my '88 which is UAV modded. I was having difficulty getting the rf shield so I shined a flash light and saw that the c64 was indeed clipped which I thought might be the case because dark chambers does not work. I am leaning towards it might be the Pitfall 2 cart now. There are a few 2600 games that work on my 87 but not my 88 - Dark Chambers, Kung-Fu Master, Gravitar and Double Dragon. Kung-Fu Master, Gravitar and Dark Chambers are all black screen. Double Dragon keeps resetting itself once it starts playing. I am wondering if that timing circuit affects more than just Dark Chambers on certain runs of the 7800? The Double Dragon issue really makes think that is the case. I believe Mitch mentioned that Stargate (AKA Defender II) would be another game likely effected by the removal of that capacitor but I've not had that happen myself when testing in the past. I do have all of those games and when I've used them to test other systems in the past, I didn't have any issues with those games. If you can get that shielding off, you could also try and reattach the capacitor back down if it wasn't completely removed to see if that helps with the other games you've mentioned. If it does, then perhaps longer term was should be done is to either have people decide to keep it in place or not or figure out a way to install a switch into the system to toggle the circuit on/off as possibly needed. 1 Quote Link to comment Share on other sites More sharing options...
envytomdead2 Posted October 7, 2020 Share Posted October 7, 2020 @-^CrossBow^- Defender 2 does work on mine. I wonder what they might have done differently between stargate and Defender 2? The circuit is just clipped at one of the legs. Should the rf shield be difficult to get off? I was afraid to apply brute force because I don't have a soldering iron and didn't want to rip anything off the board by accident.. I had read you were just supposed to be able to bend the tabs back with a needle nose. The few tabs I saw were kind of mangled. They were sort of twisted.I straightened them the best I could to fit the slits but there was still zero movement which made me think I'd have to rip it off. Quote Link to comment Share on other sites More sharing options...
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