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    Help with Sega I/O board on Naomi/Net city

    Thanks. turned out it was an issue with usb port on the naomi. had to dremel away the plastic cap on the back up port, and now it works like a dream
  2. E

    Help with Sega I/O board on Naomi/Net city

    Recently got a Sega Net City, along with a Naomi GPU. It boots up and runs the game, but wont take any inputs, not even the "test" or service buttons. The I/O board is a Sega 837-13551 I've made sure everything is powered, and double checked that pins 1 and 3 are connected on the 60 pin...
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