Function new_m261 

pub fn new_m261(
    prg_rom: Box<[u8]>,
    chr_rom: Box<[u8]>,
    mirroring: Mirroring,
) -> Result<SimpleBmc, MapperError>

Mapper 261 (BMC-810544-C-A1 address-as-data multicart).

Errors

MapperError::Invalid on a bad PRG/CHR size.