diff --git a/lib/mom/mom_compiler.rb b/lib/mom/mom_compiler.rb
index 2c2e96d0..efdd1faf 100644
--- a/lib/mom/mom_compiler.rb
+++ b/lib/mom/mom_compiler.rb
@@ -3,7 +3,7 @@ module Mom
     attr_reader :clazz , :method_compilers
 
     def initialize(compilers = [])
-      @method_compilers = Builtin.boot_functions + compilers
+      @method_compilers = Risc::Builtin.boot_functions + compilers
     end
 
     # Translate code to whatever cpu is specified.
@@ -14,7 +14,8 @@ module Mom
     def translate( platform_sym )
       platform_sym = platform_sym.to_s.capitalize
       platform = Risc::Platform.for(platform_sym)
-      translate_methods( platform.translator )
+      assemblers = translate_methods( platform.translator )
+      Risc::Linker.new(platform , assemblers)
       #@cpu_init = risc_init.to_cpu(@platform.translator)
     end
 
diff --git a/lib/risc/linker.rb b/lib/risc/linker.rb
index 19d7c9b4..5e06620b 100644
--- a/lib/risc/linker.rb
+++ b/lib/risc/linker.rb
@@ -13,19 +13,20 @@ module Risc
     include Util::Logging
     log_level :info
 
-    def initialize(platform)
+    def initialize(platform , assemblers)
       if(platform.is_a?(Symbol))
         platform = platform.to_s.capitalize
         platform = Risc::Platform.for(platform)
       end
       raise "Platform must be platform, not #{platform.class}" unless platform.is_a?(Platform)
       @platform = platform
+      @assemblers = assemblers
       @risc_init = nil
       @constants = []
     end
 
     attr_reader  :constants , :cpu_init
-    attr_reader  :platform
+    attr_reader  :platform , :assemblers
 
     # machine keeps a list of all objects and their positions.
     # this is lazily created with a collector
@@ -38,12 +39,6 @@ module Risc
     def risc_init
       @risc_init ||= Branch.new( "__initial_branch__" , Parfait.object_space.get_init.risc_instructions )
     end
-    # add a constant (which get created during compilation and need to be linked)
-    def add_constant(const)
-      raise "Must be Parfait #{const}" unless const.is_a?(Parfait::Object)
-      @constants << const
-    end
-
 
     # To create binaries, objects (and labels) need to have a position
     # (so objects can be loaded and branches know where to jump)
diff --git a/lib/risc/method_compiler.rb b/lib/risc/method_compiler.rb
index fbf009e5..9cf4115c 100644
--- a/lib/risc/method_compiler.rb
+++ b/lib/risc/method_compiler.rb
@@ -61,7 +61,9 @@ module Risc
       end
     end
 
+    # add a constant (which get created during compilation and need to be linked)
     def add_constant(const)
+      raise "Must be Parfait #{const}" unless const.is_a?(Parfait::Object)
       @constants << const
     end
 
diff --git a/lib/rubyx/rubyx_compiler.rb b/lib/rubyx/rubyx_compiler.rb
index ce8531dc..aebbcc24 100644
--- a/lib/rubyx/rubyx_compiler.rb
+++ b/lib/rubyx/rubyx_compiler.rb
@@ -27,9 +27,7 @@ module RubyX
     def ruby_to_binary(platform = :arm)
       Parfait.boot!
       Risc.boot!
-      assemblers = ruby_to_mom
-      puts "Assemblers #{assemblers}"
-      linker = Risc::Linker.new(platform)
+      linker = ruby_to_risc(platform)
       linker.position_all
       linker.create_binary
     end
diff --git a/test/mom/test_method_compiler.rb b/test/mom/test_mom_compiler.rb
similarity index 65%
rename from test/mom/test_method_compiler.rb
rename to test/mom/test_mom_compiler.rb
index e6c2026e..6bebe52e 100644
--- a/test/mom/test_method_compiler.rb
+++ b/test/mom/test_mom_compiler.rb
@@ -13,7 +13,7 @@ module Mom
       assert_equal MomCompiler , @comp.class
     end
     def test_compilers
-      assert_equal 1 , @comp.method_compilers.length
+      assert_equal 24 , @comp.method_compilers.length
     end
     def test_has_translate
       assert @comp.translate(:interpreter)
@@ -29,16 +29,19 @@ module Mom
     end
 
     def test_translate_class
-      assert_equal Array , @trans.class
+      assert_equal Risc::Linker , @trans.class
+    end
+    def test_translate_platform
+      assert_kind_of Risc::Platform , @trans.platform
     end
     def test_translate_assemblers
-      assert_equal Risc::Assembler , @trans.first.class
+      assert_equal Risc::Assembler , @trans.assemblers.first.class
     end
     def test_assembler_code
-      assert_equal Risc::Label , @trans.first.instructions.class
+      assert_equal Risc::Label , @trans.assemblers.first.instructions.class
     end
     def test_assembler_assembled
-      assert_equal Risc::LoadConstant , @trans.first.instructions.next.class
+      assert_equal Risc::SlotToReg , @trans.assemblers.first.instructions.next.class
     end
   end
 end
diff --git a/test/risc/test_linker.rb b/test/risc/test_linker.rb
index c44ffe53..385b7233 100644
--- a/test/risc/test_linker.rb
+++ b/test/risc/test_linker.rb
@@ -6,27 +6,23 @@ module Risc
     def setup
       Parfait.boot!
       Risc.boot!
-      @machine = Linker.new(:arm)
+      @linker = Mom::MomCompiler.new.translate(:arm)
     end
     def test_objects
-      objects = @machine.object_positions
+      objects = @linker.object_positions
       assert_equal Hash , objects.class
       assert 350 < objects.length
     end
     def test_constant_fail
       assert_raises {@machine.add_constant( 1 )}
     end
-    def test_constant
-      assert @machine.add_constant( Parfait::Integer.new(5) )
-    end
   end
   class TestMachinePos < MiniTest::Test
     def setup
       Parfait.boot!
       Risc.boot!
-      @linker = Linker.new(:arm)
-      @linker.translate
-      @machine.position_all
+      @linker = Mom::MomCompiler.new.translate(:arm)
+      @linker.position_all
     end
     def test_positions_set
       @machine.object_positions.each do |obj , position|
diff --git a/test/rubyx/test_rubyx_compiler2.rb b/test/rubyx/test_rubyx_compiler2.rb
index 57dc6ff3..9f43f506 100644
--- a/test/rubyx/test_rubyx_compiler2.rb
+++ b/test/rubyx/test_rubyx_compiler2.rb
@@ -5,11 +5,16 @@ module RubyX
     include ScopeHelper
     include RubyXHelper
 
-    def test_to_risc
+    def setup
+      super
       code = "class Space ; def main(arg);return arg;end; end"
-      risc = ruby_to_risc(code, :interpreter)
-      assert_equal Array , risc.class
+      @linker = ruby_to_risc(code, :interpreter)
+    end
+    def test_to_risc
+      assert_equal Risc::Linker , @linker.class
+    end
+    def test_method
+      assert_equal :main , @linker.assemblers.last.method.name
     end
-
   end
 end
diff --git a/test/vool/test_class_statement.rb b/test/vool/test_class_statement.rb
index 97caf29e..5277e137 100644
--- a/test/vool/test_class_statement.rb
+++ b/test/vool/test_class_statement.rb
@@ -16,5 +16,10 @@ module Vool
     def test_has_compilers
       assert_equal Risc::MethodCompiler , @ret.method_compilers.first.class
     end
+
+    def test_constant
+      assert @ret.method_compilers.first.add_constant( Parfait::Integer.new(5) )
+    end
+
   end
 end