+------+------+   
       R0 --> area:  | 44   | chan |   
                     +------+------+
                     |    dblk     |
                     +-------------+
                     |      0      |  (Reserved)
                     +------+------+     
                     |offse |  0   |  (High byte is            
                     +------+------+   offset into             
                                       directory entry)