the japanese c1 did not have a lockout chip, and it would play any standard famicom game, or any nes game using an appropriate adapter. because of the design of the fds ram adapter, due to its shape, you cannot connect the fds to the c1 without modification, however it is possible to couple nes to famicom (60 to 72 pin), and famicom to nes (72 pin to 60 pin) adapters in series, to attach the fds to the c1.