derive binary code form word

long ago hacked the binary code to use integers (thus forsaking correct
arm binaries)
Finally fix by deriving from Word which now has correct binary access
Dumped binary.name in the process, that is available from the method

lib/register/boot.rb

@@ -76,7 +76,8 @@ module Register
         classes[name] = cl
       end
       # superclasses other than default object
-      supers = {  :Object => :Kernel , :Kernel => :Value, :Integer => :Value }
+      supers = {  :Object => :Kernel , :Kernel => :Value,
+                  :Integer => :Value , :BinaryCode => :Word }
       layout_names.each do |classname , ivar|
         next if classname == :Value  # has no superclass
         clazz = classes[classname]
@@ -116,7 +117,7 @@ module Register
           :Integer => {},
           :Object => {},
           :Kernel => {}, #fix, kernel is a class, but should be a module
-          :BinaryCode => {:name => :Word},
+          :BinaryCode => {:char_length => :Integer} ,
           :Space => {:classes => :Dictionary , :first_message => :Message},
           :Frame => {:next_frame => :Frame, :indexed_length => :Integer},
           :Layout => {:object_class => :Class, :instance_methods => :List , :indexed_length => :Integer} ,