Function new_m289 

pub fn new_m289(
    prg_rom: Box<[u8]>,
    chr_rom: Box<[u8]>,
    mirroring: Mirroring,
) -> Result<SimpleBmc, MapperError>

Mapper 289 (BMC-60311C NROM/UNROM multicart).

Errors

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