diff --git a/lib/risc/interpreter.rb b/lib/risc/interpreter.rb
index 2e67dec1..33355899 100644
--- a/lib/risc/interpreter.rb
+++ b/lib/risc/interpreter.rb
@@ -33,7 +33,7 @@ module Risc
     end
 
     def start_program
-      initialize
+      initialize(@linker)
       init = @linker.cpu_init
       set_state(:running)
       set_pc( Position.get(init).at )
@@ -62,7 +62,7 @@ module Risc
     end
 
     def set_instruction( instruction )
-      raise "set to same instruction #{instruction}:#{instruction.class}" if @instruction == instruction
+      raise "set to same instruction #{instruction}:#{instruction.class} at #{clock}" if @instruction == instruction
       log.debug "Setting Instruction #{instruction.class}"
       old = @instruction
       @instruction = instruction
diff --git a/lib/rubyx/rubyx_compiler.rb b/lib/rubyx/rubyx_compiler.rb
index aebbcc24..45b9aead 100644
--- a/lib/rubyx/rubyx_compiler.rb
+++ b/lib/rubyx/rubyx_compiler.rb
@@ -24,12 +24,13 @@ module RubyX
       mom.translate(platform)
     end
 
-    def ruby_to_binary(platform = :arm)
+    def ruby_to_binary(platform)
       Parfait.boot!
       Risc.boot!
       linker = ruby_to_risc(platform)
       linker.position_all
       linker.create_binary
+      linker
     end
   end
 end
diff --git a/test/risc/test_interpreter.rb b/test/risc/test_interpreter.rb
index 338c0206..75c6a68b 100644
--- a/test/risc/test_interpreter.rb
+++ b/test/risc/test_interpreter.rb
@@ -2,48 +2,49 @@ require_relative "helper"
 
 module Risc
   class TestInterpreterBasics < MiniTest::Test
+    def setup
+      Parfait.boot!
+      Risc.boot!
+      @linker = Mom::MomCompiler.new.translate(:interpreter)
+    end
 
     def test_class
-      assert_equal Risc::Interpreter , Interpreter.new.class
+      assert_equal Risc::Interpreter , Interpreter.new(@linker).class
     end
     def test_starts_stopped
-      assert_equal :stopped , Interpreter.new.state
+      assert_equal :stopped , Interpreter.new(@linker).state
     end
     def test_has_regs
-      assert_equal 12 , Interpreter.new.registers.length
+      assert_equal 12 , Interpreter.new(@linker).registers.length
     end
     def test_has_r0
-      assert_equal :r0 , Interpreter.new.registers.keys.first
+      assert_equal :r0 , Interpreter.new(@linker).registers.keys.first
     end
   end
   class TestInterpreterStarts < MiniTest::Test
+    include Ticker
     def setup
-      Parfait.boot!
-      @machine = Risc.machine.boot
-      @machine.translate(:interpreter)
-      @machine.position_all
-      @interpreter = Interpreter.new
+      @string_input = as_main("return 5")
+      super
     end
     def test_starts
-      assert_equal 0 , @interpreter.start_machine
+      assert_equal 0 , @interpreter.start_program
     end
     def test_started
-      @interpreter.start_machine
+      @interpreter.start_program
       assert_equal :running , @interpreter.state
     end
     def test_pos
-      @interpreter.start_machine
+      @interpreter.start_program
       assert_equal 1 , @interpreter.clock
     end
   end
   class TestInterpreterTicks < MiniTest::Test
+    include Ticker
     def setup
-      Parfait.boot!
-      @machine = Risc.machine.boot
-      @machine.translate(:interpreter)
-      @machine.position_all
-      @interpreter = Interpreter.new
-      @interpreter.start_machine
+      @string_input = as_main("return 5")
+      super
+      @interpreter.start_program
     end
     def test_tick1
       assert_equal 2 , @interpreter.tick
@@ -54,7 +55,7 @@ module Risc
     end
     def test_pc1
       @interpreter.tick
-      assert_equal 20728 , @interpreter.pc
+      assert_equal 21304 , @interpreter.pc
     end
     def test_tick2
       @interpreter.tick
@@ -68,7 +69,7 @@ module Risc
     def test_pc2
       @interpreter.tick
       @interpreter.tick
-      assert_equal 20732 , @interpreter.pc
+      assert_equal 21308 , @interpreter.pc
     end
     def test_tick_14_jump
       14.times {@interpreter.tick}
diff --git a/test/support/risc_interpreter.rb b/test/support/risc_interpreter.rb
index 2143980b..96ba413e 100644
--- a/test/support/risc_interpreter.rb
+++ b/test/support/risc_interpreter.rb
@@ -7,11 +7,8 @@ module Risc
     include ScopeHelper
 
     def setup
-      Parfait.boot!
-      Risc.boot!
-      RubyX::RubyXCompiler.new(@string_input).ruby_to_binary( :interpreter)
-      @interpreter = Interpreter.new
-      @interpreter.start_machine
+      @linker = RubyX::RubyXCompiler.new(@string_input).ruby_to_binary( :interpreter)
+      @interpreter = Interpreter.new(@linker)
     end
     alias :do_setup :setup