INES Mapper 120

iNES Mapper 120 denotes Whirlwind Manu's LH15 cartridge conversion of Square's FDS game とびだせ大作戦 (Tobidase Daisakusen).

Banks

• CPU $6000-$7FFF: 8 KiB switchable PRG ROM bank
• CPU $8000-$FFFF: 32 KiB hard-wired PRG ROM bank #2
• PPU $0000-$1FFF: 8 KiB unbanked CHR RAM
• Nametable mirroring: hard-wired (to vertical)

Registers

PRG ROM switch ($41FF, write)

Address Mask: $E100

D~[.... .PPP]
         +++- Select 8 KiB PRG ROM bank at CPU $6000-$7FFF