copies of the old code to start the new layer

lib/neumann/word.rb

@@ -0,0 +1,36 @@
+module Vm
+  # Word is an abstract base class for the obvious values, ie those that fit into a register
+  # Marked as abstract by private constructor
+  #
+  # Integer and (Object) References are the main derived classes, but float will come and ...
+  # The Mystery Value has unknown type and has only casting methods. So it must be cast to be useful.
+  # Types are stored at runtime when needed in TYPE_REGISTER (r1 on arm), which is mostly before calls, 
+  # so that the called function can do casts / branching correctly
+  class Word < Value
+    attr_accessor :register
+    def register_symbol
+      @register.symbol
+    end
+    def inspect
+      "#{self.class.name} (#{register_symbol})"
+    end
+    def to_s
+      inspect
+    end
+    def length
+      4
+    end
+    # aka to string
+    def to_asm
+      "#{register_symbol}"
+    end
+    private 
+    def initialize reg
+      if reg.is_a? RegisterReference
+        @register = reg
+      else
+        @register = RegisterReference.new(reg)
+      end
+    end
+  end
+end