High Addresses             
                                     +------------+           
                                     |  LINBUF    |
                                     +------------+           
                                     |  DEVSPC    |
                                     +------------+           
                                     |  DEFEXT    |
                                     +------------+           
                                     |  CSTRNG    |
                     Stack Pointer=> +------------+          
                      Low Addresses