iNES Mapper 120 denotes Whirlwind Manu's LH15 cartridge conversion of Square's FDS game とびだせ大作戦 (Tobidase Daisakusen).
Address Mask: $E100
D~[.... .PPP]
+++- Select 8 KiB PRG ROM bank at CPU $6000-$7FFF
Categories: FDS conversion mappers, Mappers with CHR RAM