100-240 means there should be a switch for either 115 or 230. In the US we set this to 115. Other countries I have no idea. Most Jamma needs +5, -5 and +12V. If your power supply doesn't have -5 then it's pretty useless but Capcom didn't use it on CPS1 or 2, I don't think, so it should work for those. If it's a supergun someone made I imagine it does have -5 too though. You might want to get a shitty test board. Well it depends on the supergun I guess, who built it. I don't know about watts on arcade power supplies, I've only paid attention to volts. Mine says max 104W out.
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