          | &lt;---+ First node
   |       +---&gt; |                              |
   |       |     +------------------------------+
   |       |     |  Forward pointer             | ----+
   |       |     +------------------------------+     |
   |       |     |  Rest of DLA Descriptor 1    |     |
   |       |     +------------------------------+     |
   |       |     |  Segment 1 integer component |     |
   |       |     +------------------------------+     |
   |       +---- |  Backward pointer     