diff --git a/lib/phisol/compiler/basic_values.rb b/lib/phisol/compiler/basic_values.rb
index 0d7ca605..23f05ba3 100644
--- a/lib/phisol/compiler/basic_values.rb
+++ b/lib/phisol/compiler/basic_values.rb
@@ -13,37 +13,35 @@ module Phisol
 
     def on_int statement
       int = statement.first
-#      reg =
-      to =  Virtual::Return.new(Phisol::Integer , int)
-      @method.source.add_code Virtual::Set.new( int , to )
-      to
+      reg = use_reg :int
+      @method.source.add_code Register::LoadConstant.new( statement, int , reg )
+      return reg
     end
 
     def on_true statement
-      to = Virtual::Return.new(Phisol::Reference , true )
-      @method.source.add_code Virtual::Set.new( true , to )
-      to
+      reg = use_reg :ref
+      @method.source.add_code Register::LoadConstant.new( statement, true , reg )
+      return reg
     end
 
     def on_false statement
-      to = Virtual::Return.new(Phisol::Reference , false)
-      @method.source.add_code Virtual::Set.new( false , to )
-      to
+      reg = use_reg :ref
+      @method.source.add_code Register::LoadConstant.new( statement, false , reg )
+      return reg
     end
 
     def on_nil statement
-      to = Virtual::Return.new(Phisol::Reference , nil)
-      @method.source.add_code Virtual::Set.new( nil , to )
-      to
+      reg = use_reg :ref
+      @method.source.add_code Register::LoadConstant.new( statement, nil , reg )
+      return reg
     end
 
     def on_string statement
-      # Clearly a TODO here to implement strings rather than reusing symbols
       value = statement.first.to_sym
-      to = Virtual::Return.new(Phisol::Reference , value)
+      reg = use_reg :ref
       @method.source.constants << value
-      @method.source.add_code Virtual::Set.new( value , to )
-      to
+      @method.source.add_code Register::LoadConstant.new( statement, value , reg )
+      return reg
     end
   end
 end
diff --git a/lib/phisol/compiler/field_access.rb b/lib/phisol/compiler/field_access.rb
index 9a36fd49..7d132b64 100644
--- a/lib/phisol/compiler/field_access.rb
+++ b/lib/phisol/compiler/field_access.rb
@@ -11,8 +11,10 @@ module Phisol
       when :self
         index = @clazz.object_layout.variable_index(field_name)
         raise "field access, but no such field:#{field_name} for class #{@clazz.name}" unless index
-        value = Virtual::Return.new(:int)
-        @method.source.add_code Virtual::Set.new( Virtual::SelfsSlot.new(index, :int ) , value )
+        value = use_reg(:int) #TODO, need types in layout
+        move = Register.get_slot(statement, :self , index , value )
+        @method.source.add_code move
+        return value
       when :message
         #message Slot
         raise "message not yet"
diff --git a/test/compiler/compiler_helper.rb b/test/compiler/compiler_helper.rb
index 9b59f258..b553f480 100644
--- a/test/compiler/compiler_helper.rb
+++ b/test/compiler/compiler_helper.rb
@@ -5,11 +5,13 @@ module CompilerHelper
 
   Phisol::Compiler.class_eval do
     def set_main
+      @clazz = Virtual.machine.space.get_class_by_name :Object
       @method = Virtual.machine.space.get_main
     end
   end
   def check
-    machine = Virtual.machine.boot
+    machine = Virtual.machine
+    machine.boot unless machine.booted
     parser = Parser::Salama.new
     parser = parser.send @root
     syntax  = parser.parse_with_debug(@string_input)
@@ -18,13 +20,8 @@ module CompilerHelper
     compiler = Phisol::Compiler.new
     compiler.set_main
     produced = compiler.process( parts )
-    produced = [produced] unless produced.is_a? Array
     assert @output , "No output given"
-    assert_equal  produced.length, @output.length , "Block length"
-    produced.each_with_index do |b,i|
-      codes = @output[i]
-      assert_equal codes ,  b.class ,  "Class #{i} "
-    end
+    assert_equal  produced.class, @output , "Wrong class"
   end
 
 end
diff --git a/test/compiler/test_all.rb b/test/compiler/test_all.rb
index 864de38b..d0b1bfcc 100644
--- a/test/compiler/test_all.rb
+++ b/test/compiler/test_all.rb
@@ -1,4 +1,3 @@
 require_relative "test_basic"
-require_relative "test_hello"
 require_relative "test_compiler"
 require_relative "test_field_access"
diff --git a/test/compiler/test_basic.rb b/test/compiler/test_basic.rb
index 7f871ae2..5c221d81 100644
--- a/test/compiler/test_basic.rb
+++ b/test/compiler/test_basic.rb
@@ -6,7 +6,7 @@ class TestBasic < MiniTest::Test
 
   def setup
     @root = :basic_type
-    @output = [Virtual::Return]
+    @output = Register::RegisterValue
   end
 
   def test_number
@@ -15,7 +15,7 @@ class TestBasic < MiniTest::Test
   end
 
   def test_true
-    @string_input    = 'true '
+    @string_input    = 'true'
     check
   end
   def test_false
@@ -30,12 +30,13 @@ class TestBasic < MiniTest::Test
   def test_var
     @string_input    = 'int foo '
     @root = :field_def
+    @output = AST::Node
     check
   end
 
   def test_self
     @string_input    = 'self '
-    @output = [Virtual::Self]
+    @output = Virtual::Self
     check
   end
 
diff --git a/test/compiler/test_field_access.rb b/test/compiler/test_field_access.rb
index 3108670f..d5ba9e6b 100644
--- a/test/compiler/test_field_access.rb
+++ b/test/compiler/test_field_access.rb
@@ -1,24 +1,30 @@
 require_relative "compiler_helper"
-require_relative "code_checker"
 
 module Virtual
-  class TestFoo < MiniTest::Test
-    include CodeChecker
+  class TestFields < MiniTest::Test
+    include CompilerHelper
 
-    def test_foo3
-      @string_input = <<HERE
-class Object
-  field int a
-  int foo(int x)
-    int b = self.a
-    return b +x
-  end
-end
-HERE
-      @output =  [ [Virtual::MethodEnter] , [Virtual::MethodReturn] ]
-      check
+    def setup
+      Virtual.machine.boot
     end
 
+    def test_field_not_defined
+      @root = :field_access
+      @string_input = <<HERE
+self.a
+HERE
+      assert_raises(RuntimeError) { check }
+    end
+
+    def test_field
+      Virtual.machine.space.get_class_by_name(:Object).object_layout.add_instance_variable(:bro)
+      @root = :field_access
+      @string_input = <<HERE
+self.bro
+HERE
+      @output = Register::RegisterValue
+    check
+    end
 
   end
 end