+--------------------------------------------+--------------------+
|                                            |                    |
|                                            |                    |
|                                            |                    |
|                                            |                    |
|    Usable part of the virtual console      |                    |
|                                            |                    |
|                                            |                    |
|                                            |                    |
|                                            |                    |
|                                            |                    |
+--------------------------------------------+                    |
|                                                                 |
|                                                                 |
|                            Whole virutal console                |
|                                                                 |
|                                                                 |
+-----------------------------------------------------------------+