NES 2.0 Mapper 421
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NES 2.0 Mapper 421 denotes the 晶太 (Jingtai, a.k.a. J.Y. Company) SC871115C circuit board.
NES 2.0 Mapper 421 denotes the 晶太 (Jingtai, a.k.a. J.Y. Company) SC871115C circuit board.