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root42

Mappy cartridge broken...?

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Mappy is my favorite game on the 2600. Today I noticed that the left difficulty switch doesn't work anymore. It should toggle the placement of the loot. The loot is now always randomized, no matter what. The switch still works — for example in Scramble I can toggle the burst mode. I mostly just swap between Mappy and Scramble these days, sometimes with the occasional Harmony or original game (Missile Command) thrown in. I unplug the Atari after every session on the wall socket. Any ideas what might be wrong with the cart?

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Update: now it’s working again. Maybe I should double check those switches. Might be they are a bit corroded? Will get some contact cleaner spray from a friend…

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Good idea. Any hints for the cartridge port on how to best clean it? Contact cleaner spray? Isopropyl on something? It’s probably hard to get to the contacts. 

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Well lotsa ways to clean the slot. I cut down a credit card to size and use it to support a bit of paper wrapped/looped around the edge in a "U" shape. And I always prefer contact cleaner as it is also a lubricant that prolongs contact life.

 

Alcohol/water can cut through some grime, too. It can be used as a pre-cleaner. But it doesn't have any protective/lube capability. So you want to finish up with real contact cleaner. Like Deoxit.

 

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Lazy, easiest way that's quite effective in a pinch... rubbing alcohol or contact cleaner like DeOxit on a Q-Tip, apply to the edge connector of the cartridge, then insert the cartridge wet into the system and insert/remove a few times. Wipe off excess grime on the cartridge afterwards.

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6 hours ago, Keatah said:

Well lotsa ways to clean the slot. I cut down a credit card to size and use it to support a bit of paper wrapped/looped around the edge in a "U" shape. And I always prefer contact cleaner as it is also a lubricant that prolongs contact life.

 

Alcohol/water can cut through some grime, too. It can be used as a pre-cleaner. But it doesn't have any protective/lube capability. So you want to finish up with real contact cleaner. Like Deoxit.

 

Pretty much what I do, only I use an old white t-shirt wrapped around the CC section I have cut up. I have two pieces. Once for the 2600 and 7800 main central portion and a smaller one for the 7800s side PCB contacts. I first use alcohol, and then follow up with a spritz of de-ox-id (generic version), into the slot and use a different part of the t-shirt to clean and finish. Best part is that a t-shirt can be used many times in different spots and then tossed in the wash later for cleaning and reuse.

 

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