Commit 75cc38d

@@ -72,3 +72,34 @@ Each binding is a mapping from one address space to another.
 * Load time binding: The compiler generates `relocatable code` where final binding is delayed until load time.
   * If the starting address changes, then we need to reload the user code to adjust.
 * Execution time binding: binding can be delayed until run time but special hardware must be available for this scheme to work.
+
+## Logical vs. Physical Address Space
+
+CPU generated addresses are referred to as a `logical address`.
+An address seen by the memory unit, i.e. loaded into the `memory-address register`,
+is called `physcial address`.
+
+The compile-time and load-time address-binding methods generate identical logical and physical addresses.
+Execution-time addresses result in differing logical and physical addresses.
+
+```plaintext
+                                                                         ------------
+                                                                         |          |
+                                                                         |          |
+                                |------------|                           |          |
+                                | relocation |                           |          |
+                                | register   |                           |          |
+                                |            |                           |          |
+                                | | 14000 |  |                           |          |
+                                |            |                           |          |
+-------                         |     _      |                           |          |
+| CPU | --> logical address --> |    (+)     | ---> physical address --> |  memory  |
+-------          346            |     -      |           14346           |          |
+                                |            |                           |          |
+                                |            |                           |          |
+                                |------------|                           |          |
+                                     MMU                                 |          |
+                                                                         |          |
+                                                                         |          |
+                                                                         ------------
+```