Mars_Worm_(Unl)[Waixing][a_1] pass 1

game
  crc: 2401d09e
  title: Mars_Worm_(Unl)[Waixing][a_1]
  board: 256
    memory
      type: ROM
      size: 0x10000
      content: Program
    memory
      type: ROM
      size: 0x20000
      content: Character

E: Mapper: 256

ERROR:  Unsupported mapper


Mars_Worm_(Unl)[Waixing][a_1] pass 2

game
  crc: 2401d09e
  title: Mars_Worm_(Unl)[Waixing][a_1]
  board: 256
    memory
      type: ROM
      size: 0x10000
      content: Program
    memory
      type: ROM
      size: 0x20000
      content: Character

E: Mapper: 256

ERROR:  Unsupported mapper


Mars_Worm_(Unl)[Waixing][a_1] pass 3

game
  crc: 2401d09e
  title: Mars_Worm_(Unl)[Waixing][a_1]
  board: 256
    memory
      type: ROM
      size: 0x10000
      content: Program
    memory
      type: ROM
      size: 0x20000
      content: Character

E: Mapper: 256

ERROR:  Unsupported mapper