systems:
  nintendo-fds:
    readers:
      fds-image:
        location: {offset: 0, length: 14, encoding: ascii}
        decode:
          kind: exact-prefix
          values:
            - {value: "FDS\x1a", label: fds}
          otherwise: unknown
  sega-dreamcast:
    readers:
      dc-product-id:
        location: {offset: 64, length: 10, encoding: ascii}
        fields:
          disk_type: {offset: 37, length: 6, encoding: ascii, mil_cd: MIL CD}
        decode:
          kind: serial