Fishing_(Unl)[Nice_Code][a_3] pass 1

game
  crc: 508d2134
  title: Fishing_(Unl)[Nice_Code][a_3]
  board: 256
    memory
      type: ROM
      size: 0x10000
      content: Program
    memory
      type: ROM
      size: 0x20000
      content: Character

E: Mapper: 256

ERROR:  Unsupported mapper


Fishing_(Unl)[Nice_Code][a_3] pass 2

game
  crc: 508d2134
  title: Fishing_(Unl)[Nice_Code][a_3]
  board: 256
    memory
      type: ROM
      size: 0x10000
      content: Program
    memory
      type: ROM
      size: 0x20000
      content: Character

E: Mapper: 256

ERROR:  Unsupported mapper


Fishing_(Unl)[Nice_Code][a_3] pass 3

game
  crc: 508d2134
  title: Fishing_(Unl)[Nice_Code][a_3]
  board: 256
    memory
      type: ROM
      size: 0x10000
      content: Program
    memory
      type: ROM
      size: 0x20000
      content: Character

E: Mapper: 256

ERROR:  Unsupported mapper