4_in_1_(Multi)[Unknown][GK_L03A][Mushrooms] pass 1

game
  crc: 09975865
  title: 4_in_1_(Multi)[Unknown][GK_L03A][Mushrooms]
  board: 57
    mirror: 1
    memory
      type: ROM
      size: 0x20000
      content: Program
    memory
      type: ROM
      size: 0x20000
      content: Character

E: Mapper: 57

ERROR:  Unsupported mapper


4_in_1_(Multi)[Unknown][GK_L03A][Mushrooms] pass 2

game
  crc: 09975865
  title: 4_in_1_(Multi)[Unknown][GK_L03A][Mushrooms]
  board: 57
    mirror: 1
    memory
      type: ROM
      size: 0x20000
      content: Program
    memory
      type: ROM
      size: 0x20000
      content: Character

E: Mapper: 57

ERROR:  Unsupported mapper


4_in_1_(Multi)[Unknown][GK_L03A][Mushrooms] pass 3

game
  crc: 09975865
  title: 4_in_1_(Multi)[Unknown][GK_L03A][Mushrooms]
  board: 57
    mirror: 1
    memory
      type: ROM
      size: 0x20000
      content: Program
    memory
      type: ROM
      size: 0x20000
      content: Character

E: Mapper: 57

ERROR:  Unsupported mapper