Function new_m52 

pub fn new_m52(
    prg_rom: Box<[u8]>,
    chr_rom: Box<[u8]>,
    mirroring: Mirroring,
) -> Result<Mmc3CloneMapper, MapperError>

Mapper 52 (BMC Mario 7-in-1 MMC3 multicart).

Errors

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