start notes on MMU

1 files changed, 5 insertions, 1 deletions

diff --git a/doc/8.md b/doc/8.md
index 10f3230..415e61d 100644
--- a/doc/8.md
+++ b/doc/8.md
@@ -75,7 +75,7 @@ Each binding is a mapping from one address space to another.
 
 ## Logical vs. Physical Address Space
 
-CPU generated addresses are referred to as a `logical address`.
+CPU generated addresses are referred to as a `logical address` or `virtual address`.
 An address seen by the memory unit, i.e. loaded into the `memory-address register`,
 is called `physcial address`.
 
@@ -103,3 +103,7 @@ Execution-time addresses result in differing logical and physical addresses.
                                                                          |          |
                                                                          ------------
 ```
+
+The `memory-management unit (MMU)` maps virtual to physical addresses.
+
+The `base register` is referred to as the `relocation register` in the virtual address scheme.