       /-----------------------\
       |c33F +-----+   /---+---+
       |SZ   |c85F |   | c088  |
       |     |KB0  +-->| KB1   |
       \----++---------+-------/   
            |              
            |          
            |          
            |          
            |          
            |
      /-----+--------\
      |              |
      |              |
  /---++----\  /----++---\  
  |c33F|c85F|  |c85F|c33F|
  |SSt |KB0 |  |KB0 |SSt |
  |    +----+  +----+    |
  \---------/  \---------/
