seperate different Position classes into own files

also tests
and have Position module keep all positions
(singletons should be at module, not class level)

test/risc/test_machine.rb

@@ -41,5 +41,20 @@ module Risc
     def test_has_jump
       assert_equal "ea0011f4" ,  @machine.binary_init.get_word(1).to_s(16)
     end
+    def test_pos_bin
+      assert_equal "0x0" ,  Position.get(@machine.binary_init).to_s
+    end
+    def test_pos_cpu
+      assert_equal 12 ,  Position.get(@machine.cpu_init).at
+    end
+    def test_cpu_at
+      assert_equal 3 ,  Position.get(@machine.cpu_init.first).at
+    end
+    def test_cpu_bin
+      assert_equal "0x3ed8" ,  Position.get(Position.get(@machine.cpu_init.first).binary).to_s
+    end
+    def test_cpu_label
+      assert_equal Position::InstructionPosition ,  Position.get(@machine.cpu_init.first).class
+    end
   end
 end