diff --git a/lib/arm/instructions/instruction.rb b/lib/arm/instructions/instruction.rb
index 32296595..386950a5 100644
--- a/lib/arm/instructions/instruction.rb
+++ b/lib/arm/instructions/instruction.rb
@@ -23,11 +23,12 @@ module Arm
 
     def insert(instruction)
       super
-      @next.set_position( Risc::Position.position(self) + self.byte_length , 0) #FIXME
+      my_pos = Risc::Position.position(self)
+      @next.set_position(  my_pos + self.byte_length , 0 , my_pos.binary)
     end
 
-    def set_position( position , count )
-      Risc::Position.set_position(self,position)
+    def set_position( position , count , extra = nil)
+      Risc::Position.set_position(self,position , extra)
       position += byte_length
       if self.next
         count += 1 #assumes 4 byte instructions, as does the whole setup
@@ -35,7 +36,7 @@ module Arm
           count = 0
           position += 12 # 12=3*4 , 3 for marker,type,next words to jump over
         end
-        self.next.set_position( position , count )
+        self.next.set_position( position , count , extra)
       else
         position
       end
diff --git a/lib/risc/instructions/label.rb b/lib/risc/instructions/label.rb
index 37ca0f50..582f61af 100644
--- a/lib/risc/instructions/label.rb
+++ b/lib/risc/instructions/label.rb
@@ -45,9 +45,9 @@ module Risc
     end
 
     # labels have the same position as their next
-    def set_position( position , count = 0)
-      Position.set_position(self,position)
-      self.next.set_position(position,count) if self.next
+    def set_position( position , count = 0 , extra = nil)
+      Position.set_position(self,position , extra)
+      self.next.set_position(position,count,extra) if self.next
     end
 
     # shame we need this, just for logging
diff --git a/lib/risc/machine.rb b/lib/risc/machine.rb
index f6d70f33..956b4f0b 100644
--- a/lib/risc/machine.rb
+++ b/lib/risc/machine.rb
@@ -78,7 +78,7 @@ module Risc
       translate_arm unless @translated
       #need the initial jump at 0 and then functions
       Position.set_position(binary_init,0)
-      cpu_init.set_position( 12 ,0)
+      cpu_init.set_position( 12 ,0 , binary_init)
       @code_start = position_objects( binary_init.padded_length )
       # and then everything code
       position_code
@@ -110,7 +110,7 @@ module Risc
       at = @code_start
       objects.each do |id , method|
         next unless method.is_a? Parfait::TypedMethod
-        method.cpu_instructions.set_position( at + 12)
+        method.cpu_instructions.set_position( at + 12 , 0 , method.binary)
         before = at
         nekst = method.binary
         while(nekst)
diff --git a/lib/risc/position.rb b/lib/risc/position.rb
index b0f7faf7..39f20e4c 100644
--- a/lib/risc/position.rb
+++ b/lib/risc/position.rb
@@ -36,12 +36,14 @@ module Risc
       "0x#{@at.to_s(16)}"
     end
     def reset_to(pos)
+      return false if pos == at
       if((at - pos).abs > 1000)
         raise "position set too far off #{pos}!=#{at} for #{object}:#{object.class}"
       end
       @at = pos
-      self
+      true
     end
+
     def self.positions
       @positions
     end
@@ -62,7 +64,10 @@ module Risc
       # in measures (of 32)
       #puts "Setting #{pos} for #{self.class}"
       old = Position.positions[object]
-      return old.reset_to(pos) if old != nil
+      if old != nil
+        old.reset_to(pos)
+        return old
+      end
       self.positions[object] = for_at( object , pos , extra)
     end
 
@@ -71,7 +76,7 @@ module Risc
       when Parfait::BinaryCode
         BPosition.new(object,at , extra)
       when Arm::Instruction , Risc::Label
-        IPosition.new(object,at)
+        IPosition.new(object,at , extra)
       else
         Position.new(at)
       end
@@ -79,11 +84,22 @@ module Risc
   end
   # handle event propagation
   class IPosition < Position
-    attr_reader :instruction
-    def initialize(instruction, pos)
+    attr_reader :instruction , :binary
+    def initialize(instruction, pos , binary)
+      raise "not set " unless binary
       super(pos)
       @instruction = instruction
+      @binary = binary
     end
+
+    def reset_to(pos)
+      changed = super(pos)
+      puts "Reset (#{changed}) #{instruction}"
+      return unless changed
+      return unless instruction.next
+      instruction.next.set_position( pos + instruction.byte_length , 0)
+    end
+
   end
   class BPosition < Position
     attr_reader :code , :method