Linked                          Unlinked
                     +------+------+                 +------+------+
      R0 ---> area:  |  14  |  0   |  R0 ---> area:  |  14  |  1   |
                     +------+------+                 +------+------+
                     |    addr     |                 |    addr     |
                     +-------------+                 +-------------+