diff --git a/lib/register/instruction.rb b/lib/register/instruction.rb
index 2ba2803b..4d8e913a 100644
--- a/lib/register/instruction.rb
+++ b/lib/register/instruction.rb
@@ -30,5 +30,6 @@ module Register
   
 end
 
-require "instructions/variable_set"
-#require "instructions/object_set"
+require_relative "instructions/set_slot"
+require_relative "instructions/get_slot"
+require_relative "instructions/load_constant"
diff --git a/lib/register/instructions/get_slot.rb b/lib/register/instructions/get_slot.rb
new file mode 100644
index 00000000..e90433f1
--- /dev/null
+++ b/lib/register/instructions/get_slot.rb
@@ -0,0 +1,16 @@
+module Register
+  # offset memory get access
+  # so the value to be set must be given as the first register
+  # the second argument holds the base address
+  # and the third a possible (small) offset into the "object"
+  #
+  # if for example the value is pointed to by a register, a VariableGet (load) is needed first
+  class GetSlot < Instruction
+    def initialize value , reference , index = 0
+      @value = value
+      @reference = reference
+      @index = index
+    end
+    attr_accessor :value , :reference , :index
+  end
+end
diff --git a/lib/register/instructions/load_constant.rb b/lib/register/instructions/load_constant.rb
new file mode 100644
index 00000000..205f3b78
--- /dev/null
+++ b/lib/register/instructions/load_constant.rb
@@ -0,0 +1,14 @@
+module Register
+  # load a constant into a register
+  #
+  # first arguemnt is the register the constant is loaded into 
+  # second is the actual constant
+ 
+  class LoadConstant < Instruction
+    def initialize value , constant
+      @value = value
+      @constant = constant
+    end
+    attr_accessor :value , :constant 
+  end
+end
diff --git a/lib/register/instructions/set_slot.rb b/lib/register/instructions/set_slot.rb
new file mode 100644
index 00000000..85c430fc
--- /dev/null
+++ b/lib/register/instructions/set_slot.rb
@@ -0,0 +1,16 @@
+module Register
+  # offset memory set access
+  # so the value must be given as the first register
+  # the second argument holds the base address
+  # and the third a possible (small) offset into the "object"
+  #
+  # if for example the value is pointed to by a register, a VariableGet (load) is needed first
+  class SetSlot < Instruction
+    def initialize value , reference , index = 0
+      @value = value
+      @reference = reference
+      @index = index
+    end
+    attr_accessor :value , :reference , :index
+  end
+end
diff --git a/lib/register/passes/set_implementation.rb b/lib/register/passes/set_implementation.rb
index 79a486b3..196026ab 100644
--- a/lib/register/passes/set_implementation.rb
+++ b/lib/register/passes/set_implementation.rb
@@ -21,7 +21,7 @@ end
 
 module Register
   # This implements setting of the various slot variables the vm defines. 
-  # Basic mem moves, but have to shuffle the type nibbles
+  # Basic mem moves, but have to shuffle the type nibbles (TODO!)
   
   class SetImplementation
     def run block
@@ -33,11 +33,11 @@ module Register
         tmp = RegisterReference.new(Virtual::Message::TMP_REG)
         # for constants we have to "move" the constants value
         if( code.from.is_a? Virtual::Constant)
-          move1 = RegisterMachine.instance.mov( tmp , code.from )
+          move1 = LoadConstant.new( tmp , code.from )
         else # while otherwise we "load"
-          move1 = RegisterMachine.instance.ldr( tmp , code.from.reg , code.from.index )
+          move1 = GetSlot.new( tmp , code.from.reg , code.from.index )
         end
-        move2 = RegisterMachine.instance.str( tmp , to , code.to.index )
+        move2 = SetSlot.new( tmp , to , code.to.index )
         block.replace(code , [move1,move2] )
       end
     end