2_in_1_(Multi)[Unknown][1996][2B23][Fighter_12][Mapper_52] pass 1

game
  crc: 1548c41d
  title: 2_in_1_(Multi)[Unknown][1996][2B23][Fighter_12][Mapper_52]
  board: 52
    memory
      type: ROM
      size: 0x40000
      content: Program
    memory
      type: ROM
      size: 0x40000
      content: Character

E: Mapper: 52

ERROR:  Unsupported mapper


2_in_1_(Multi)[Unknown][1996][2B23][Fighter_12][Mapper_52] pass 2

game
  crc: 1548c41d
  title: 2_in_1_(Multi)[Unknown][1996][2B23][Fighter_12][Mapper_52]
  board: 52
    memory
      type: ROM
      size: 0x40000
      content: Program
    memory
      type: ROM
      size: 0x40000
      content: Character

E: Mapper: 52

ERROR:  Unsupported mapper


2_in_1_(Multi)[Unknown][1996][2B23][Fighter_12][Mapper_52] pass 3

game
  crc: 1548c41d
  title: 2_in_1_(Multi)[Unknown][1996][2B23][Fighter_12][Mapper_52]
  board: 52
    memory
      type: ROM
      size: 0x40000
      content: Program
    memory
      type: ROM
      size: 0x40000
      content: Character

E: Mapper: 52

ERROR:  Unsupported mapper