diff --git a/lib/ast/basic_expressions.rb b/lib/ast/basic_expressions.rb
index afa30178..4d4a9194 100644
--- a/lib/ast/basic_expressions.rb
+++ b/lib/ast/basic_expressions.rb
@@ -5,7 +5,7 @@ module Ast
   class IntegerExpression < Expression
 #    attr_reader :value
     def compile context
-      Vm::IntegerConstant.new value
+      Virtual::IntegerConstant.new value
     end
   end
 
@@ -34,7 +34,7 @@ module Ast
   class StringExpression < Expression
 #    attr_reader  :string
     def compile context
-      value = Vm::StringConstant.new(string)
+      value = Virtual::StringConstant.new(string)
       context.object_space.add_object value 
       value
     end
diff --git a/lib/ast/call_site_expression.rb b/lib/ast/call_site_expression.rb
index 7497ae63..add393fe 100644
--- a/lib/ast/call_site_expression.rb
+++ b/lib/ast/call_site_expression.rb
@@ -20,7 +20,7 @@ module Ast
       elsif receiver.is_a?(NameExpression) 
         if(receiver.name == :self)
           function = context.current_class.resolve_function(name)
-          value_receiver = Vm::Integer.new(Vm::RegisterMachine.instance.receiver_register)
+          value_receiver = Virtual::Integer.new(Virtual::RegisterMachine.instance.receiver_register)
         else
           value_receiver = receiver.compile(context)
           # TODO HACK warning: should determine class dynamically
@@ -35,7 +35,7 @@ module Ast
       end
       raise "No such method error #{inspect}" if (function.nil?)
       raise "No receiver error #{inspect}:#{receiver}" if (value_receiver.nil?)
-      call = Vm::CallSite.new( name ,  value_receiver , params  , function)
+      call = Virtual::CallSite.new( name ,  value_receiver , params  , function)
       current_function = context.function
       into.push([])  unless current_function.nil?
       call.load_args into
diff --git a/lib/ast/expression_list.rb b/lib/ast/expression_list.rb
new file mode 100644
index 00000000..a33e909e
--- /dev/null
+++ b/lib/ast/expression_list.rb
@@ -0,0 +1,10 @@
+module Ast
+  class ExpressionList < Expression
+#    attr_reader  :expressions
+    def compile binding
+      expressions.each do |part|
+        expr    = part.compile( binding )
+      end
+    end
+  end
+end
\ No newline at end of file
diff --git a/lib/ast/function_expression.rb b/lib/ast/function_expression.rb
index f406fbd0..3ce8bbd9 100644
--- a/lib/ast/function_expression.rb
+++ b/lib/ast/function_expression.rb
@@ -6,13 +6,13 @@ module Ast
       locals = {}
       params.each_with_index do |param , index|
         arg = param.name
-        register = Vm::RegisterReference.new(Vm::RegisterMachine.instance.receiver_register).next_reg_use(index + 1)
-        arg_value = Vm::Integer.new(register)
+        register = Virtual::RegisterReference.new(Virtual::RegisterMachine.instance.receiver_register).next_reg_use(index + 1)
+        arg_value = Virtual::Integer.new(register)
         locals[arg] = arg_value
         args << arg_value
       end
       # class depends on receiver
-      me = Vm::Integer.new( Vm::RegisterMachine.instance.receiver_register )
+      me = Virtual::Integer.new( Virtual::RegisterMachine.instance.receiver_register )
       if receiver.nil? 
         clazz = context.current_class
       else
@@ -20,7 +20,7 @@ module Ast
         clazz = c.meta_class
       end
 
-      function = Vm::Function.new(name , me , args )
+      function = Virtual::Function.new(name , me , args )
       clazz.add_function function 
 
       parent_locals = context.locals
@@ -32,11 +32,11 @@ module Ast
       body.each do |b|
         puts "compiling in function #{b}"
         last_compiled = b.compile(context)
-        raise "alarm #{last_compiled} \n #{b}" unless last_compiled.is_a? Vm::Word
+        raise "alarm #{last_compiled} \n #{b}" unless last_compiled.is_a? Virtual::Word
       end
       
-      return_reg = Vm::Integer.new(Vm::RegisterMachine.instance.return_register)
-      if last_compiled.is_a?(Vm::IntegerConstant) or last_compiled.is_a?(Vm::ObjectConstant)
+      return_reg = Virtual::Integer.new(Virtual::RegisterMachine.instance.return_register)
+      if last_compiled.is_a?(Virtual::IntegerConstant) or last_compiled.is_a?(Virtual::ObjectConstant)
         return_reg.load function , last_compiled if last_compiled.register_symbol != return_reg.register_symbol
       else
         return_reg.move( function, last_compiled ) if last_compiled.register_symbol != return_reg.register_symbol
diff --git a/lib/ast/if_expression.rb b/lib/ast/if_expression.rb
index a52d7f40..6e4eacda 100644
--- a/lib/ast/if_expression.rb
+++ b/lib/ast/if_expression.rb
@@ -11,7 +11,7 @@ module Ast
 
       puts "compiling if condition #{cond}"
       cond_val = cond.compile(context)
-      unless cond_val.is_a? Vm::BranchCondition
+      unless cond_val.is_a? Virtual::BranchCondition
         cond_val = cond_val.is_true? f
       end
       f.b true_block , condition_code: cond_val.operator
diff --git a/lib/ast/return_expression.rb b/lib/ast/return_expression.rb
index 44761a01..18be2a74 100644
--- a/lib/ast/return_expression.rb
+++ b/lib/ast/return_expression.rb
@@ -7,8 +7,8 @@ module Ast
       expression_value = expression.compile(context)
       # copied from function expression: TODO make function
 
-      return_reg = Vm::Integer.new(Vm::RegisterMachine.instance.return_register)
-      if expression_value.is_a?(Vm::IntegerConstant) or expression_value.is_a?(Vm::ObjectConstant)
+      return_reg = Virtual::Integer.new(Virtual::RegisterMachine.instance.return_register)
+      if expression_value.is_a?(Virtual::IntegerConstant) or expression_value.is_a?(Virtual::ObjectConstant)
         return_reg.load into , expression_value 
       else
         return_reg.move( into, expression_value ) if expression_value.register_symbol != return_reg.register_symbol
diff --git a/lib/boot/boot_class.rb b/lib/boot/boot_class.rb
index c4f911fa..ec92ca96 100644
--- a/lib/boot/boot_class.rb
+++ b/lib/boot/boot_class.rb
@@ -3,7 +3,7 @@ require_relative "meta_class"
 module Boot
   # class is mainly a list of functions with a name (for now)
   # layout of object is seperated into Layout
-  class BootClass < Vm::ObjectConstant
+  class BootClass < Virtual::ObjectConstant
     def initialize name , context , super_class = :Object
       super()
       @context = context
@@ -16,7 +16,7 @@ module Boot
     attr_reader :name , :functions , :meta_class , :context , :super_class
     
     def add_function function
-      raise "not a function #{function}" unless function.is_a? Vm::Function
+      raise "not a function #{function}" unless function.is_a? Virtual::Function
       raise "syserr " unless function.name.is_a? Symbol
       @functions << function
     end
diff --git a/lib/boot/boot_space.rb b/lib/boot/boot_space.rb
index ae339f2f..1b6039e0 100644
--- a/lib/boot/boot_space.rb
+++ b/lib/boot/boot_space.rb
@@ -18,28 +18,28 @@ module Boot
   
   # throwing in a context for unspecified use (well one is to pass the programm/globals around)
    
-  class BootSpace < Vm::Code
+  class BootSpace < Virtual::Code
     
     # Initialize with a string for cpu. Naming conventions are: for Machine XXX there exists a module XXX
-    #  with a XXXMachine in it that derives from Vm::RegisterMachine
+    #  with a XXXMachine in it that derives from Virtual::RegisterMachine
     def initialize machine = nil
       super()
       machine = RbConfig::CONFIG["host_cpu"] unless machine
       machine = "intel" if machine == "x86_64"
       machine = machine.capitalize
-      Vm::RegisterMachine.instance = eval("#{machine}::#{machine}Machine").new
+      Virtual::RegisterMachine.instance = eval("#{machine}::#{machine}Machine").new
       @classes = {}
-      @context = Vm::Context.new(self)
+      @context = Virtual::Context.new(self)
       @context.current_class = get_or_create_class :Object
-      @main = Vm::Function.new("main")
+      @main = Virtual::Function.new("main")
       @context.function = @main
       #global objects (data)
       @objects = []
-      @entry = Vm::RegisterMachine.instance.main_start @context
+      @entry = Virtual::RegisterMachine.instance.main_start @context
       #main gets executed between entry and exit
-      @exit = Vm::RegisterMachine.instance.main_exit @context
+      @exit = Virtual::RegisterMachine.instance.main_exit @context
       boot_classes
-      @passes = [ Vm::MoveMoveReduction.new ,  Vm::LogicMoveReduction.new, Vm::NoopReduction.new, Vm::SaveLocals.new ]
+      @passes = [ Virtual::MoveMoveReduction.new ,  Virtual::LogicMoveReduction.new, Virtual::NoopReduction.new, Virtual::SaveLocals.new ]
     end
     attr_reader :context , :main , :classes , :entry , :exit
 
@@ -81,7 +81,7 @@ module Boot
     # Objects are data and get assembled after functions
     def add_object o
       return if @objects.include? o
-      raise "must be derived from Code #{o.inspect}" unless o.is_a? Vm::Code
+      raise "must be derived from Code #{o.inspect}" unless o.is_a? Virtual::Code
       @objects << o # TODO check type , no basic values allowed (must be wrapped)
     end
 
diff --git a/lib/boot/meta_class.rb b/lib/boot/meta_class.rb
index e40149e4..3931d7ab 100644
--- a/lib/boot/meta_class.rb
+++ b/lib/boot/meta_class.rb
@@ -8,7 +8,7 @@ module Boot
   #                     PS: can't say i fancy the << self syntax and am considerernig adding a keyword for it, like meta
   #                      In effect it is a very similar construct to   def self.function(...)
   #                      So one could write               def meta.function(...) and thus define on the meta-class
-  class MetaClass < Vm::ObjectConstant
+  class MetaClass < Virtual::ObjectConstant
     # no name, nor nothing. as this is just the object really
     
     def initialize(object)
@@ -19,7 +19,7 @@ module Boot
     
     # in a non-booting version this should map to _add_singleton_method
     def add_function function
-      raise "not a function #{function}" unless function.is_a? Vm::Function
+      raise "not a function #{function}" unless function.is_a? Virtual::Function
       raise "syserr " unless function.name.is_a? Symbol
       @functions << function
     end
diff --git a/lib/boot/object.rb b/lib/boot/object.rb
index 9fe0095e..0e5270a3 100644
--- a/lib/boot/object.rb
+++ b/lib/boot/object.rb
@@ -5,13 +5,13 @@ module Boot
       # return the index of the variable. Now "normal" code can't really do anything with that, but 
       # set/get instance variable use it. 
       # This is just a placeholder, as we code this in ruby, but the instance methods need the definition before.
-      def index_of context , name = Vm::Integer
-        index_function = Vm::Function.new(:index_of , Vm::Reference , [Vm::Reference] , Vm::Integer )
+      def index_of context , name = Virtual::Integer
+        index_function = Virtual::Function.new(:index_of , Virtual::Reference , [Virtual::Reference] , Virtual::Integer )
         return index_function
       end
 
       def self.layout
-        layout_function = Vm::Function.new(:layout , Vm::Reference , [ ] , Vm::Reference )
+        layout_function = Virtual::Function.new(:layout , Virtual::Reference , [ ] , Virtual::Reference )
         layout_function.at_index 2
         layout_function
       end
@@ -22,8 +22,8 @@ module Boot
       #     return at_index(i)
       #  end  
       # The at_index is just "below" the api, something we need but don't want to expose, so we can't code the above in ruby
-      def _get_instance_variable context , name = Vm::Integer
-        get_function = Vm::Function.new(:_get_instance_variable , Vm::Reference , [ Vm::Reference ] , Vm::Mystery )
+      def _get_instance_variable context , name = Virtual::Integer
+        get_function = Virtual::Function.new(:_get_instance_variable , Virtual::Reference , [ Virtual::Reference ] , Virtual::Mystery )
         me = get_function.receiver
         var_name = get_function.args.first
         return_to = get_function.return_type
@@ -42,8 +42,8 @@ module Boot
         return get_function
       end
 
-      def _set_instance_variable(context , name = Vm::Integer , value = Vm::Integer )
-        set_function = Vm::Function.new(:_set_instance_variable , Vm::Reference ,[Vm::Reference ,Vm::Reference], Vm::Mystery )
+      def _set_instance_variable(context , name = Virtual::Integer , value = Virtual::Integer )
+        set_function = Virtual::Function.new(:_set_instance_variable , Virtual::Reference ,[Virtual::Reference ,Virtual::Reference], Virtual::Mystery )
         me = set_function.receiver
         var_name = set_function.args.first
         return_to = set_function.return_type
diff --git a/lib/boot/string.rb b/lib/boot/string.rb
index b1642ee9..05f1256c 100644
--- a/lib/boot/string.rb
+++ b/lib/boot/string.rb
@@ -1,12 +1,12 @@
 module Boot
   class String
     module ClassMethods
-      def get context , index = Vm::Integer
-        get_function = Vm::Function.new(:get , Vm::Integer , [ Vm::Integer] , Vm::Integer )
+      def get context , index = Virtual::Integer
+        get_function = Virtual::Function.new(:get , Virtual::Integer , [ Virtual::Integer] , Virtual::Integer )
         return get_function
       end
-      def set context , index = Vm::Integer , char = Vm::Integer
-        set_function = Vm::Function.new(:set , Vm::Integer ,[Vm::Integer, Vm::Integer] , Vm::Integer )
+      def set context , index = Virtual::Integer , char = Virtual::Integer
+        set_function = Virtual::Function.new(:set , Virtual::Integer ,[Virtual::Integer, Virtual::Integer] , Virtual::Integer )
         return set_function
       end
     end
diff --git a/lib/kernel/integer.rb b/lib/kernel/integer.rb
index 6ed03dfb..37ff1ca7 100644
--- a/lib/kernel/integer.rb
+++ b/lib/kernel/integer.rb
@@ -7,11 +7,11 @@ module Crystal
     # As we write before we recurse (save a push) we write the number backwards
     # arguments: string address , integer
     def self.utoa context
-      utoa_function = Vm::Function.new(:utoa , Vm::Integer , [ Vm::Integer ] , Vm::Integer )
+      utoa_function = Virtual::Function.new(:utoa , Virtual::Integer , [ Virtual::Integer ] , Virtual::Integer )
       str_addr = utoa_function.receiver
       number = utoa_function.args.first
       remainder = utoa_function.new_local
-      Vm::RegisterMachine.instance.div10( utoa_function , number  , remainder )
+      Virtual::RegisterMachine.instance.div10( utoa_function , number  , remainder )
       # make char out of digit (by using ascii encoding) 48 == "0"
       utoa_function.instance_eval do
         add(  remainder , remainder , 48)
@@ -24,8 +24,8 @@ module Crystal
     end
 
     def self.putint context
-      putint_function = Vm::Function.new(:putint , Vm::Integer , [] , Vm::Integer )
-      buffer = Vm::StringConstant.new("           ") # create a buffer
+      putint_function = Virtual::Function.new(:putint , Virtual::Integer , [] , Virtual::Integer )
+      buffer = Virtual::StringConstant.new("           ") # create a buffer
       context.object_space.add_object buffer              # and save it (function local variable: a no no)
       int = putint_function.receiver
       moved_int = putint_function.new_local
@@ -41,7 +41,7 @@ module Crystal
         add( int ,  buffer , nil )   # string to write to
         mov( moved_int ,  buffer.length )
       end
-      Vm::RegisterMachine.instance.write_stdout(putint_function)
+      Virtual::RegisterMachine.instance.write_stdout(putint_function)
       putint_function
     end
 
@@ -50,7 +50,7 @@ module Crystal
     # a hand coded version of the fibonachi numbers
     # not my hand off course, found in the net http://www.peter-cockerell.net/aalp/html/ch-5.html
     def self.fibo context
-      fibo_function = Vm::Function.new(:fibo , Vm::Integer , [] , Vm::Integer )
+      fibo_function = Virtual::Function.new(:fibo , Virtual::Integer , [] , Virtual::Integer )
       result = fibo_function.return_type
       int = fibo_function.receiver
     
diff --git a/lib/kernel/string.rb b/lib/kernel/string.rb
index f9aeda93..c725d35e 100644
--- a/lib/kernel/string.rb
+++ b/lib/kernel/string.rb
@@ -1,8 +1,8 @@
 module Crystal
   module Kernel
     def self.putstring context 
-      function = Vm::Function.new(:putstring , Vm::Reference , [] )
-      ret = Vm::RegisterMachine.instance.write_stdout(function)
+      function = Virtual::Function.new(:putstring , Virtual::Reference , [] )
+      ret = Virtual::RegisterMachine.instance.write_stdout(function)
       function.set_return ret
       function
     end
diff --git a/lib/kernel/system.rb b/lib/kernel/system.rb
index 8f97d66c..a113763b 100644
--- a/lib/kernel/system.rb
+++ b/lib/kernel/system.rb
@@ -1,8 +1,8 @@
 module Crystal
   module Kernel
     def self.exit context
-      function = Vm::Function.new(:exit , Vm::Integer , [] )
-      ret = Vm::RegisterMachine.instance.exit(function)
+      function = Virtual::Function.new(:exit , Virtual::Integer , [] )
+      ret = Virtual::RegisterMachine.instance.exit(function)
       function.set_return ret
       function
     end
diff --git a/lib/virtual/integer.rb b/lib/virtual/integer.rb
index b4564742..45cb1f4a 100644
--- a/lib/virtual/integer.rb
+++ b/lib/virtual/integer.rb
@@ -7,19 +7,19 @@ module Vm
 
     def less_or_equal block , right
       block.cmp( self ,  right )
-      Vm::BranchCondition.new :le
+      Virtual::BranchCondition.new :le
     end
     def greater_or_equal block , right
       block.cmp( self ,  right )
-      Vm::BranchCondition.new :ge
+      Virtual::BranchCondition.new :ge
     end
     def greater_than block , right
       block.cmp( self ,  right )
-      Vm::BranchCondition.new :gt
+      Virtual::BranchCondition.new :gt
     end
     def less_than block , right
       block.cmp( self ,  right )
-      Vm::BranchCondition.new :lt
+      Virtual::BranchCondition.new :lt
     end
     def plus block , first , right
       block.add( self , left ,  right )
@@ -35,12 +35,12 @@ module Vm
     end
     def equals block , right
       block.cmp( self ,  right )
-      Vm::BranchCondition.new :eq
+      Virtual::BranchCondition.new :eq
     end
 
     def is_true? function
       function.cmp( self ,  0 )
-      Vm::BranchCondition.new :ne
+      Virtual::BranchCondition.new :ne
     end
 
     def move block , right
diff --git a/test/virtual/test_basic.rb b/test/virtual/test_basic.rb
new file mode 100644
index 00000000..063ef302
--- /dev/null
+++ b/test/virtual/test_basic.rb
@@ -0,0 +1,70 @@
+require_relative "virtual_helper"
+
+class TestBasic < MiniTest::Test
+  # include the magic (setup and parse -> test method translation), see there
+  include VirtualHelper
+    
+  def test_number
+    @string_input    = '42 '
+    @output = Ast::IntegerExpression.new(42)
+    check
+  end
+
+  def test_name
+    @string_input    = 'foo '
+    @output = Ast::NameExpression.new('foo')
+    @parser = @parser.name
+  end
+
+  def test_name_underscode_start
+    @string_input    = '_bar '
+    @output = Ast::NameExpression.new('_bar')
+    @parser = @parser.name
+  end
+
+  def test_name_underscode_middle
+    @string_input    = 'foo_bar '
+    @parse_output = {:name => 'foo_bar'}
+    @output = Ast::NameExpression.new('foo_bar')
+    @parser = @parser.name
+  end
+
+  def test_instance_variable
+    @string_input    = '@foo_bar '
+    @parse_output = {:instance_variable=>{:name=>"foo_bar"}}
+    @output = Ast::VariableExpression.new(:foo_bar)
+    @parser = @parser.instance_variable
+  end
+
+  def test_module_name
+    @string_input    = 'FooBar '
+    @parse_output = {:module_name=>"FooBar"}
+    @output = Ast::ModuleName.new("FooBar")
+    @parser = @parser.module_name
+  end
+
+  def test_comment
+    out = "# i am a comment \n"
+    @string_input    =  out.dup #NEEDS the return, which is what delimits the comment
+    @parse_output = out
+    @output = @parse_output #dont transform
+    @parser = @parser.comment
+  end
+
+  def test_string
+    @string_input    = "\"hello\""
+    @parse_output =  {:string=>[{:char=>"h"}, {:char=>"e"}, {:char=>"l"}, {:char=>"l"}, {:char=>"o"}]}
+    @output =  Ast::StringExpression.new('hello')
+    @parser = @parser.string
+  end
+
+  def test_string_escapes
+    out = 'hello  \nyou'
+    @string_input    = '"' + out + '"'
+    @parse_output =  {:string=>[{:char=>"h"}, {:char=>"e"}, {:char=>"l"}, {:char=>"l"}, {:char=>"o"}, 
+      {:char=>" "}, {:char=>" "}, {:esc=>"n"}, {:char=>"y"}, {:char=>"o"}, {:char=>"u"}]}
+    @output =  Ast::StringExpression.new(out)
+    @parser = @parser.string
+  end
+
+end
\ No newline at end of file