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by wk_end
246 days ago
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The lockout chip isn't related to the converters, per se. The converter has a lockout chip, but so does every official NES game. The Famicom didn't have any kind of protection scheme, so unlicensed and bootleg games were commonplace; Nintendo added the lockout mechanism for the international release precisely in response to that. Each cartridge contains a "key" chip that unlocks the "lock" chip on the NES main board, which then releases the reset line on the CPU allowing it to operate. Naturally, this means that Famicom carts don't have the lockout mechanism, so those signals need to come from the converter. |
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Unlicensed/bootleg Famicom games weren't very common in Japan due to the control Nintendo had over game distribution. In Japan, Nintendo sold all their Famicom consoles and games through a wholesaler organization called Shoshinkai. If you wanted to sell Famicom games without a license from Nintendo, you needed to deal directly with stores and/or wholesalers who both wanted to sell Famicom games and didn't sell any Nintendo products. This limited unlicensed games to being niche underground products that were mainly sold in back-alley shops and through mail order. In the US, this level of control over distribution would probably be ruled anticompetitive, so the lockout chip was a technical solution that accomplished a similar goal.