Chris H.

Not my EM1 - it works perfectly fine with other older and newer (Melody) Atari carts...probably a bad Robotwar chip - the same thing happened with my first version of Zookeeper, but the replacement cart worked fine...

Albert - any results with your EV1 test? You've had my Robotwar cart for over two months, so I'm wondering if I can get a new working cart or a refund?... Unfortunately the Colecovision expansion module is the only way I can play Atari carts (maybe I'm relatively unique that way), so if this particular Melody cart isn't working in the EV1 then I can't use it...CH

Again, another similar issue...just received RobotWar: 2684 cart and it has the same problems with not booting in the EM1 - Champ Games carts really need to be tested against the EM1 before roll-out, since there is a large group who still use this component for Atari-based games...I've upgraded to a modern power adapter so I'm pretty sure it's not that component causing issues with their Melody carts...

Well, I received a replacement copy of Zoo Keeper from Atari Age and this one works as it should, but I cannot tell if it was the previous cartridge or my Colecovision expansion port connections that were the problem before. I also purchased a new Colecovision power adapter from Mean Well and it works as advertised, but I tried out the new Zoo Keeper cart with my old "brick" adapter and it worked with that one as well...typically I leave the SGM in my expansion port, so the main board or EM1 interface connections may be wearing out. All I know is that I now have a working version of Zoo Keeper and it's a blast...thanks for everyone's input!

My Colecovision uses the original 28.5 watt "brick" transformer that came with the unit - no problems with it powering all expansion modules including the roller controller...

Interesting that some Melody carts (like Zoo Keeper) could possibly have higher power requirements that an EM1 cannot provide - I have several other Melody carts from Champ Games that play well on my EM1 as well as many standard carts, so I know it's not the EM1 slot or expansion port connections that are the issue...if additional power is the problem it would be good to know going forward.

Thanks all - I own other Melody cartridges that work (Space Rocks, Draconian), and if someone has a copy of Zoo Keeper that works on the module #1 then it must be my copy that's defective...

Just received my copy of Champ Games new Zoo Keeper cart, and it apparently does not boot up using Expansion Module #1 - anyone else have this same problem? Tried other Atari carts including more current homebrews and everything works fine, so it seems to be this particular cart...