fix some pesty errors

need to fix instruction overlap beofre interpreter starts again

test/risc/position/test_position.rb

@@ -76,16 +76,17 @@ module Risc
       assert @position.position_listener(listener)
       assert @position.unregister_event(:position_changed ,listener)
     end
-    def pest_fires
+    def test_fires
       @object = @instruction
-      @position.position_listener(self)
+      @position.register_event(:position_changed , self)
       @position.trigger(:position_changed , @position)
       assert_equal @position , @trigger
     end
-    def pest_no_fire_after_unregister
-      listener = PositionListener.new(self)
-      assert @position.position_listener( listener)
-      assert @position.unregister_event(:position_changed ,listener)
+    def test_no_fire_after_unregister
+      @object = @instruction
+      Position.new(self, 10)
+      assert @position.register_event(:position_changed , self)
+      assert @position.unregister_event(:position_changed ,self)
       @position.trigger(:position_changed , @position)
       assert_nil @trigger
     end
@@ -100,25 +101,25 @@ module Risc
     def setup
       @machine = Risc.machine.boot
     end
-    def pest_cpu_init
+    def test_cpu_init
       @machine.translate(:interpreter)
       @machine.position_all
       assert Position.get @machine.cpu_init
     end
-    def pest_cpu_label
+    def test_cpu_label
       @machine.translate(:interpreter)
       @machine.position_all
       assert Position.get( @machine.cpu_init.label )
     end
-    def pest_cpu_first_arm
+    def test_cpu_first_arm
       @machine.translate(:arm)
       @machine.position_all
       assert Position.get( @machine.cpu_init.first )
     end
-    def pest_has_arm_pos
+    def test_has_arm_pos
       has_positions(:arm)
     end
-    def pest_has_int_pos
+    def test_has_int_pos
       has_positions(:interpreter)
     end
     def has_positions(platform)
@@ -128,10 +129,10 @@ module Risc
         assert Position.get(obj)
       end
     end
-    def pest_has_arm_meth
+    def test_has_arm_meth
       meth_positions(:arm)
     end
-    def pest_has_int_meth
+    def test_has_int_meth
       meth_positions(:interpreter)
     end
     def meth_positions(platform)