Function new_m189 

pub fn new_m189(
    prg_rom: Box<[u8]>,
    chr_rom: Box<[u8]>,
    mirroring: Mirroring,
) -> Result<Mmc3CloneMapper, MapperError>

Mapper 189 (TXC 32 KiB-PRG MMC3 clone).

Errors

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