Function new_m104 

pub fn new_m104(
    prg_rom: Box<[u8]>,
    chr_rom: Box<[u8]>,
    mirroring: Mirroring,
) -> Result<DiscreteMapper, MapperError>

Mapper 104 (Codemasters Golden Five / Pegasus 5-in-1).

Errors

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