8 byte   _map_type_and_height [TILES_X * TILES_Y];

     8 #define MAP_SIZE ((1 << TILE_X_BITS) * (1 << TILE_Y_BITS))

     9 byte   _map5                [TILES_X * TILES_Y];

     9 

    10 byte   _map3_lo             [TILES_X * TILES_Y];

    10 byte   _map_type_and_height [MAP_SIZE];

    11 byte   _map3_hi             [TILES_X * TILES_Y];

    11 byte   _map5                [MAP_SIZE];

    12 byte   _map_owner           [TILES_X * TILES_Y];

    12 byte   _map3_lo             [MAP_SIZE];

    13 uint16 _map2                [TILES_X * TILES_Y];

    13 byte   _map3_hi             [MAP_SIZE];

    14 byte   _map_extra_bits      [TILES_X * TILES_Y / 4];

    14 byte   _map_owner           [MAP_SIZE];

    15 uint16 _map2                [MAP_SIZE];

    16 byte   _map_extra_bits      [MAP_SIZE / 4];