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Re: What do I need to know to convert a modified MMC3 to MMC

Posted: Tue Feb 28, 2017 10:24 am
by double_jumper
lidnariq wrote:Mapper 118 is the exact same idea.... it's just that they used the pin that's usually connected to CHR A17 instead to CIRAM A10. So the bit becomes $80 (because the eight bits in the register normally correspond to CHR A17..A10).
Ohh, I see. Alright, so what in the ROM do I change to map those values like tepples mentioned?