rename code.length tp mem_length with lots of noise impact

lib/virtual/boot_space.rb

@@ -12,7 +12,7 @@ module Virtual
   # While data ususally would live in a .data section, we may also "inline" it into the code
   # in an oo system all data is represented as objects
    
-  class BootSpace
+  class BootSpace < Virtual::Object
     
     # Initialize with a string for cpu. Naming conventions are: for Machine XXX there exists a module XXX
     #  with a XXXMachine in it that derives from Virtual::RegisterMachine
@@ -114,5 +114,8 @@ module Virtual
       end
       c
     end
+    def mem_length
+      padded_words( 2 )
+    end
   end
 end