diff --git a/lib/arm/constants.rb b/lib/arm/constants.rb
index ec139abc..6d843ae3 100644
--- a/lib/arm/constants.rb
+++ b/lib/arm/constants.rb
@@ -60,7 +60,7 @@ module Arm
     end
     def reg_code r_name
       raise "double r #{r_name}" if( :rr1 == r_name)
-      if r_name.is_a? ::Risc::RiscValue
+      if r_name.is_a? ::Risc::RegisterValue
         r_name = r_name.symbol
       end
       if r_name.is_a? Fixnum
@@ -93,7 +93,7 @@ module Arm
      end
    end
 
-   Risc::RiscValue.class_eval do
+   Risc::RegisterValue.class_eval do
     def reg_no
       @symbol.to_s[1 .. -1].to_i
     end
diff --git a/lib/arm/instructions/compare_instruction.rb b/lib/arm/instructions/compare_instruction.rb
index 968514bf..0eeae0f7 100644
--- a/lib/arm/instructions/compare_instruction.rb
+++ b/lib/arm/instructions/compare_instruction.rb
@@ -18,19 +18,19 @@ module Arm
       rn , operand , immediate= @rn ,  @operand , 1
 
       arg = @right
-      operand = Risc::RiscValue.new( arg , :Integer) if( arg.is_a? Symbol )
+      operand = Risc::RegisterValue.new( arg , :Integer) if( arg.is_a? Symbol )
       case operand
       when Numeric
         operand = arg
         raise "numeric literal operand to large #{arg.inspect}" unless (arg.fits_u8?)
-      when Symbol , ::Risc::RiscValue
+      when Symbol , ::Risc::RegisterValue
         immediate = 0
       when Arm::Shift
         handle_shift
       else
         raise "invalid operand argument #{arg.inspect} , #{inspect}"
       end
-      val = (operand.is_a?(Symbol) or operand.is_a?(::Risc::RiscValue)) ? reg_code(operand) : operand
+      val = (operand.is_a?(Symbol) or operand.is_a?(::Risc::RegisterValue)) ? reg_code(operand) : operand
       val = 0 if val == nil
       val = shift(val , 0)
       raise inspect unless reg_code(@rd)
diff --git a/lib/arm/instructions/logic_instruction.rb b/lib/arm/instructions/logic_instruction.rb
index 77753f45..c454ddda 100644
--- a/lib/arm/instructions/logic_instruction.rb
+++ b/lib/arm/instructions/logic_instruction.rb
@@ -24,7 +24,7 @@ module Arm
 
       if (right.is_a?(Numeric))
         operand = handle_numeric(right)
-      elsif (right.is_a?(Symbol) or right.is_a?(::Risc::RiscValue))
+      elsif (right.is_a?(Symbol) or right.is_a?(::Risc::RegisterValue))
         operand = reg_code(right)    #integer means the register the integer is in (otherwise constant)
         immediate = 0                # ie not immediate is register
       else
@@ -89,7 +89,7 @@ module Arm
     # this also loads constants, which are issued as pc relative adds
     def determine_operands
       if( @left.is_a?(Parfait::Object) or @left.is_a?(Risc::Label) or
-        (@left.is_a?(Symbol) and !Risc::RiscValue.look_like_reg(@left)))
+        (@left.is_a?(Symbol) and !Risc::RegisterValue.look_like_reg(@left)))
         left = @left
         left = left.address if left.is_a?(Risc::Label)
         # do pc relative addressing with the difference to the instuction
diff --git a/lib/arm/instructions/memory_instruction.rb b/lib/arm/instructions/memory_instruction.rb
index 92a57bc8..22b5c40e 100644
--- a/lib/arm/instructions/memory_instruction.rb
+++ b/lib/arm/instructions/memory_instruction.rb
@@ -24,8 +24,8 @@ module Arm
     #TODO better test, this operand integer (register) does not work.
     def assemble(io)
       arg = @left
-      arg = arg.symbol if( arg.is_a? ::Risc::RiscValue )
-      is_reg = arg.is_a?(::Risc::RiscValue)
+      arg = arg.symbol if( arg.is_a? ::Risc::RegisterValue )
+      is_reg = arg.is_a?(::Risc::RegisterValue)
       is_reg = (arg.to_s[0] == "r") if( arg.is_a?(Symbol) and not is_reg)
 
       raise "invalid operand argument #{arg.inspect} #{inspect}" unless (is_reg )
@@ -34,7 +34,7 @@ module Arm
       #not sure about these 2 constants. They produce the correct output for str r0 , r1
       # but i can't help thinking that that is because they are not used in that instruction and
       # so it doesn't matter. Will see
-      if (operand.is_a?(Symbol) or operand.is_a?(::Risc::RiscValue))
+      if (operand.is_a?(Symbol) or operand.is_a?(::Risc::RegisterValue))
         val = reg_code(operand)
         i = 1  # not quite sure about this, but it gives the output of as. read read read.
       else
@@ -66,7 +66,7 @@ module Arm
     def get_operand
       return @operand unless  @right
       operand = @right
-      operand = operand.symbol if operand.is_a? ::Risc::RiscValue
+      operand = operand.symbol if operand.is_a? ::Risc::RegisterValue
       unless( operand.is_a? Symbol)
         # TODO test/check/understand: has no effect in current tests
         # add_offset = (operand < 0) ? 0 : 1
diff --git a/lib/arm/instructions/move_instruction.rb b/lib/arm/instructions/move_instruction.rb
index 7621cd1a..a706d903 100644
--- a/lib/arm/instructions/move_instruction.rb
+++ b/lib/arm/instructions/move_instruction.rb
@@ -4,8 +4,8 @@ module Arm
     def initialize( to , from , options = {})
       super(nil)
       @attributes = options
-      if( from.is_a?(Symbol) and Risc::RiscValue.look_like_reg(from) )
-        from = Risc::RiscValue.new(from , :Integer)
+      if( from.is_a?(Symbol) and Risc::RegisterValue.look_like_reg(from) )
+        from = Risc::RegisterValue.new(from , :Integer)
       end
       @from = from
       @to = to
@@ -28,7 +28,7 @@ module Arm
       case right
       when Numeric
         operand = numeric_operand(right)
-      when Risc::RiscValue
+      when Risc::RegisterValue
         operand = reg_code(right)
         immediate = 0                # ie not immediate is register
       else
diff --git a/lib/risc.rb b/lib/risc.rb
index 62a9646e..e4583c56 100644
--- a/lib/risc.rb
+++ b/lib/risc.rb
@@ -35,7 +35,7 @@ end
 
 
 require_relative "risc/instruction"
-require_relative "risc/risc_value"
+require_relative "risc/register_value"
 require_relative "risc/text_writer"
 require_relative "risc/builtin"
 require_relative "risc/builder"
diff --git a/lib/risc/builder.rb b/lib/risc/builder.rb
index 1b14bf88..7634ffa7 100644
--- a/lib/risc/builder.rb
+++ b/lib/risc/builder.rb
@@ -162,7 +162,7 @@ module Risc
   # by the slots. All data (at any time) is in one of the instance variables of these two
   # objects. Risc defines module methods with the same names (and _reg)
   def self.resolve_to_register( reference )
-    return reference if reference.is_a?(RiscValue)
+    return reference if reference.is_a?(RegisterValue)
     case reference
     when :message
       return message_reg
@@ -175,7 +175,7 @@ module Risc
 
   # The first arg is a class name (possibly lowercase) and the second an instance variable name.
   def self.resolve_type( object , compiler )
-    object = object.type if object.is_a?(RiscValue)
+    object = object.type if object.is_a?(RegisterValue)
     case object
     when :name
       type = Parfait.object_space.get_class_by_name( :Word ).instance_type
@@ -206,7 +206,7 @@ module Risc
   # The class can be mapped to a register, and so we get a memory address (reg+index)
   # Third arg, compiler, is only needed to resolve receiver/arguments/frame
   def self.resolve_to_index(object , variable_name ,compiler = nil)
-    return variable_name if variable_name.is_a?(Integer) or variable_name.is_a?(RiscValue)
+    return variable_name if variable_name.is_a?(Integer) or variable_name.is_a?(RegisterValue)
     type = resolve_type(object , compiler)
     index = type.variable_index(variable_name)
     raise "Index not found for #{variable_name} in #{object} of type #{type}" unless index
diff --git a/lib/risc/builtin/object.rb b/lib/risc/builtin/object.rb
index 185c14c4..85b8d6b5 100644
--- a/lib/risc/builtin/object.rb
+++ b/lib/risc/builtin/object.rb
@@ -104,12 +104,12 @@ module Risc
         # This relies on linux to save and restore all registers
         #
         def save_message(builder)
-          r8 = RiscValue.new( :r8 , :Message)
+          r8 = RegisterValue.new( :r8 , :Message)
           builder.add_code Risc.transfer("save_message", Risc.message_reg , r8 )
         end
 
         def restore_message(builder)
-          r8 = RiscValue.new( :r8 , :Message)
+          r8 = RegisterValue.new( :r8 , :Message)
           return_tmp = builder.compiler.use_reg :fixnum
           source = "_restore_message"
           # get the sys return out of the way
diff --git a/lib/risc/builtin/word.rb b/lib/risc/builtin/word.rb
index c094a83c..22667512 100644
--- a/lib/risc/builtin/word.rb
+++ b/lib/risc/builtin/word.rb
@@ -9,7 +9,7 @@ module Risc
           builder = compiler.builder(true, compiler.method)
           builder.add_slot_to_reg( "putstring" , :message , :receiver , :new_message )
           index = Parfait::Word.get_length_index
-          reg = RiscValue.new(:r2 , :Integer)
+          reg = RegisterValue.new(:r2 , :Integer)
           builder.add_slot_to_reg( "putstring" , :new_message , index , reg )
           Risc::Builtin::Object.emit_syscall( builder , :putstring )
           compiler.add_mom( Mom::ReturnSequence.new)
diff --git a/lib/risc/instructions/function_return.rb b/lib/risc/instructions/function_return.rb
index ebcc9dc8..691b5195 100644
--- a/lib/risc/instructions/function_return.rb
+++ b/lib/risc/instructions/function_return.rb
@@ -7,7 +7,7 @@ module Risc
     def initialize( source , register )
       super(source)
       @register = register
-      raise "Not register #{register}" unless RiscValue.look_like_reg(register)
+      raise "Not register #{register}" unless RegisterValue.look_like_reg(register)
     end
     attr_reader :register
 
diff --git a/lib/risc/instructions/getter.rb b/lib/risc/instructions/getter.rb
index 0d5cf8d8..564883eb 100644
--- a/lib/risc/instructions/getter.rb
+++ b/lib/risc/instructions/getter.rb
@@ -23,9 +23,9 @@ module Risc
       @index = index
       @register = register
       raise "index #{index}" if index.is_a?(Numeric) and index < 0
-      raise "Not integer or reg #{index}" unless index.is_a?(Numeric) or RiscValue.look_like_reg(index)
-      raise "Not register #{register}" unless RiscValue.look_like_reg(register)
-      raise "Not register #{array}" unless RiscValue.look_like_reg(array)
+      raise "Not integer or reg #{index}" unless index.is_a?(Numeric) or RegisterValue.look_like_reg(index)
+      raise "Not register #{register}" unless RegisterValue.look_like_reg(register)
+      raise "Not register #{array}" unless RegisterValue.look_like_reg(array)
     end
     attr_accessor :array , :index , :register
 
diff --git a/lib/risc/instructions/load_constant.rb b/lib/risc/instructions/load_constant.rb
index bf277a77..55cf20f3 100644
--- a/lib/risc/instructions/load_constant.rb
+++ b/lib/risc/instructions/load_constant.rb
@@ -10,7 +10,7 @@ module Risc
       @register = register
       @constant = constant
       raise "Not Constant #{constant}" if constant.is_a?(Mom::SlotDefinition)
-      raise "Not register #{register}" unless RiscValue.look_like_reg(register)
+      raise "Not register #{register}" unless RegisterValue.look_like_reg(register)
     end
     attr_accessor :register , :constant
 
diff --git a/lib/risc/instructions/load_data.rb b/lib/risc/instructions/load_data.rb
index 63011187..58ab2d97 100644
--- a/lib/risc/instructions/load_data.rb
+++ b/lib/risc/instructions/load_data.rb
@@ -13,7 +13,7 @@ module Risc
       @register = register
       @constant = constant
       raise "Not Integer #{constant}" unless constant.is_a?(Integer)
-      raise "Not register #{register}" unless RiscValue.look_like_reg(register)
+      raise "Not register #{register}" unless RegisterValue.look_like_reg(register)
     end
     attr_accessor :register , :constant
 
diff --git a/lib/risc/instructions/operator_instruction.rb b/lib/risc/instructions/operator_instruction.rb
index a396ea91..9a12218b 100644
--- a/lib/risc/instructions/operator_instruction.rb
+++ b/lib/risc/instructions/operator_instruction.rb
@@ -17,8 +17,8 @@ module Risc
       raise "unsuported operator :#{operator}:" unless Risc.operators.include?(operator)
       @left = left
       @right = right
-      raise "Not register #{left}" unless RiscValue.look_like_reg(left)
-      raise "Not register #{right}" unless RiscValue.look_like_reg(right)
+      raise "Not register #{left}" unless RegisterValue.look_like_reg(left)
+      raise "Not register #{right}" unless RegisterValue.look_like_reg(right)
     end
     attr_reader :operator, :left , :right
 
diff --git a/lib/risc/instructions/setter.rb b/lib/risc/instructions/setter.rb
index 6290534d..8a99f159 100644
--- a/lib/risc/instructions/setter.rb
+++ b/lib/risc/instructions/setter.rb
@@ -22,9 +22,9 @@ module Risc
       @array = array
       @index = index
 #      raise "index 0 " if index < 0
-      raise "Not integer or reg #{index}" unless index.is_a?(Numeric) or RiscValue.look_like_reg(index)
-      raise "Not register #{register}" unless RiscValue.look_like_reg(register)
-      raise "Not register #{array}" unless RiscValue.look_like_reg(array)
+      raise "Not integer or reg #{index}" unless index.is_a?(Numeric) or RegisterValue.look_like_reg(index)
+      raise "Not register #{register}" unless RegisterValue.look_like_reg(register)
+      raise "Not register #{array}" unless RegisterValue.look_like_reg(array)
     end
     attr_accessor :register , :array , :index
 
diff --git a/lib/risc/instructions/transfer.rb b/lib/risc/instructions/transfer.rb
index 78c6930f..cb870015 100644
--- a/lib/risc/instructions/transfer.rb
+++ b/lib/risc/instructions/transfer.rb
@@ -20,8 +20,8 @@ module Risc
       super(source)
       @from = from
       @to = to
-      raise "Fix me #{from}" unless from.is_a? RiscValue
-      raise "Fix me #{to}" unless to.is_a? RiscValue
+      raise "Fix me #{from}" unless from.is_a? RegisterValue
+      raise "Fix me #{to}" unless to.is_a? RegisterValue
     end
     attr_reader :from, :to
 
diff --git a/lib/risc/interpreter.rb b/lib/risc/interpreter.rb
index 03b847d1..a1069353 100644
--- a/lib/risc/interpreter.rb
+++ b/lib/risc/interpreter.rb
@@ -70,8 +70,8 @@ module Risc
     end
 
     def get_register( reg )
-      reg = reg.symbol if reg.is_a? Risc::RiscValue
-      raise "Not a register #{reg}" unless Risc::RiscValue.look_like_reg(reg)
+      reg = reg.symbol if reg.is_a? Risc::RegisterValue
+      raise "Not a register #{reg}" unless Risc::RegisterValue.look_like_reg(reg)
       @registers[reg]
     end
 
@@ -87,7 +87,7 @@ module Risc
         @flags[:minus] = false
       end
       return if old === val
-      reg = reg.symbol if reg.is_a? Risc::RiscValue
+      reg = reg.symbol if reg.is_a? Risc::RegisterValue
       val = Parfait.object_space.nil_object if val.nil? #because that's what real code has
       @registers[reg] = val
       trigger(:register_changed, reg ,  old , val)
diff --git a/lib/risc/risc_value.rb b/lib/risc/register_value.rb
similarity index 82%
rename from lib/risc/risc_value.rb
rename to lib/risc/register_value.rb
index 1fd1d4cd..49250980 100644
--- a/lib/risc/risc_value.rb
+++ b/lib/risc/register_value.rb
@@ -1,8 +1,8 @@
 module Risc
 
-  # RiscValue is like a variable name, a storage location. The location is a register off course.
+  # RegisterValue is like a variable name, a storage location. The location is a register off course.
 
-  class RiscValue
+  class RegisterValue
 
     attr_reader :symbol , :type , :value
 
@@ -26,7 +26,7 @@ module Risc
     end
 
     def self.look_like_reg is_it
-      return true if is_it.is_a? RiscValue
+      return true if is_it.is_a? RegisterValue
       return false unless is_it.is_a? Symbol
       if( [:lr , :pc].include? is_it )
         return true
@@ -40,7 +40,7 @@ module Risc
 
     def == other
       return false if other.nil?
-      return false if other.class != RiscValue
+      return false if other.class != RegisterValue
       symbol == other.symbol
     end
 
@@ -49,7 +49,7 @@ module Risc
       int = @symbol[1,3].to_i
       raise "No more registers #{self}" if int > 11
       sym = "r#{int + 1}".to_sym
-      RiscValue.new( sym , type, value)
+      RegisterValue.new( sym , type, value)
     end
 
     def rxf_reference_name
@@ -57,16 +57,16 @@ module Risc
     end
 
     # can't overload "=" , so use shift for it.
-    # move the right side to the left. Left (this) is a RiscValue
+    # move the right side to the left. Left (this) is a RegisterValue
     # right value may be
     # - constant (Parfait object) , resulting in a LoadConstant
-    # - another RiscValue, resulting in a Transfer instruction
+    # - another RegisterValue, resulting in a Transfer instruction
     # - an RValue, resulting in an SlotToReg
     def <<( right )
       case right
       when Parfait::Object , Symbol
         ins = Risc.load_constant("#{right.class} to #{self.type}" , right , self)
-      when RiscValue
+      when RegisterValue
         ins = Risc.transfer("#{right.type} to #{self.type}" , right , self)
       when RValue
         ins = Risc.slot_to_reg("#{right.register.type}[#{right.index}] -> #{self.type}" , right.register , right.index , self)
@@ -78,7 +78,7 @@ module Risc
     end
 
     def -( right )
-      raise "operators only on registers, not #{right.class}" unless right.is_a? RiscValue
+      raise "operators only on registers, not #{right.class}" unless right.is_a? RegisterValue
       op = Risc.op("#{self.type} - #{right.type}", :- , self , right )
       builder.add_code(op) if builder
       op
@@ -92,7 +92,7 @@ module Risc
     end
   end
 
-  # Just a struct, see comment for [] of RiscValue
+  # Just a struct, see comment for [] of RegisterValue
   #
   class RValue
     attr_reader :register , :index , :builder
@@ -103,7 +103,7 @@ module Risc
     # fullfil the objects purpose by creating a RegToSlot instruction from
     # itself (the slot) and the register given
     def <<( reg )
-      raise "not reg #{reg}" unless reg.is_a?(RiscValue)
+      raise "not reg #{reg}" unless reg.is_a?(RegisterValue)
       reg_to_slot = Risc.reg_to_slot("#{reg.type} -> #{register.type}[#{index}]" , reg , register, index)
       builder.add_code(reg_to_slot) if builder
       reg_to_slot
@@ -113,19 +113,19 @@ module Risc
 
   # The register we use to store the current message object is :r0
   def self.message_reg
-    RiscValue.new :r0 , :Message
+    RegisterValue.new :r0 , :Message
   end
 
   # The register we use to store the new message object is :r3
   # The new message is the one being built, to be sent
   def self.new_message_reg
-    RiscValue.new :r1 , :Message
+    RegisterValue.new :r1 , :Message
   end
 
   # The first scratch register. There is a next_reg_use to get a next and next.
   # Current thinking is that scratch is schatch between instructions
   def self.tmp_reg( type , value = nil)
-    RiscValue.new :r1 , type , value
+    RegisterValue.new :r1 , type , value
   end
 
 end
diff --git a/test/arm/test_move.rb b/test/arm/test_move.rb
index cc55af17..f3e348c6 100644
--- a/test/arm/test_move.rb
+++ b/test/arm/test_move.rb
@@ -37,28 +37,28 @@ module Arm
     end
 
     def test_shiftr1
-      code = @machine.mov  :r1,  :r2 , :shift_asr => Risc::RiscValue.new(:r3 , :Integer)
+      code = @machine.mov  :r1,  :r2 , :shift_asr => Risc::RegisterValue.new(:r3 , :Integer)
       assert_code code , :mov , [0x52,0x13,0xb0,0xe1] #e1 b0 13 52
     end
     def test_shiftr2
-      code = @machine.mov  :r2,  :r3 , :shift_asr => Risc::RiscValue.new(:r4 , :Integer)
+      code = @machine.mov  :r2,  :r3 , :shift_asr => Risc::RegisterValue.new(:r4 , :Integer)
       assert_code code , :mov , [0x53,0x24,0xb0,0xe1] #e1 b0 24 53
     end
     def test_shiftr3
-      code = @machine.mov  :r3,  :r4 , :shift_asr => Risc::RiscValue.new(:r5 , :Integer)
+      code = @machine.mov  :r3,  :r4 , :shift_asr => Risc::RegisterValue.new(:r5 , :Integer)
       assert_code code , :mov , [0x54,0x35,0xb0,0xe1] #e1 b0 35 54
     end
 
     def test_shiftl1
-      code = @machine.mov  :r1,  :r2 , :shift_lsr => Risc::RiscValue.new(:r3 , :Integer)
+      code = @machine.mov  :r1,  :r2 , :shift_lsr => Risc::RegisterValue.new(:r3 , :Integer)
       assert_code code , :mov , [0x32,0x13,0xb0,0xe1] #e1 b0 13 32
     end
     def test_shiftl2
-      code = @machine.mov  :r2,  :r3 , :shift_lsr => Risc::RiscValue.new(:r4 , :Integer)
+      code = @machine.mov  :r2,  :r3 , :shift_lsr => Risc::RegisterValue.new(:r4 , :Integer)
       assert_code code , :mov , [0x33,0x24,0xb0,0xe1] #e1 b0 24 33
     end
     def test_shiftl3
-      code = @machine.mov  :r3,  :r4 , :shift_lsr => Risc::RiscValue.new(:r5 , :Integer)
+      code = @machine.mov  :r3,  :r4 , :shift_lsr => Risc::RegisterValue.new(:r5 , :Integer)
       assert_code code , :mov , [0x34,0x35,0xb0,0xe1] #e1 b0 35 34
     end
 
diff --git a/test/risc/test_builder.rb b/test/risc/test_builder.rb
index ae3ae19d..903be235 100644
--- a/test/risc/test_builder.rb
+++ b/test/risc/test_builder.rb
@@ -17,7 +17,7 @@ module Risc
     end
     def test_alloc_space
       reg = @builder.space
-      assert_equal RiscValue , reg.class
+      assert_equal RegisterValue , reg.class
       assert_equal :Space , reg.type
     end
     def test_next_message
@@ -31,36 +31,36 @@ module Risc
       assert_equal :Message , reg.type
     end
     def test_returns_built
-      r1 = RiscValue.new(:r1 , :Space)
+      r1 = RegisterValue.new(:r1 , :Space)
       built = @builder.build{ space << r1 }
       assert_equal Transfer , built.class
     end
     def test_returns_two
-      r1 = RiscValue.new(:r1 , :Space)
+      r1 = RegisterValue.new(:r1 , :Space)
       built = @builder.build{ space << r1 ; space << r1}
       assert_equal Transfer , built.next.class
     end
     def test_returns_slot
-      r2 = RiscValue.new(:r2 , :Message)
+      r2 = RegisterValue.new(:r2 , :Message)
       r2.builder = @builder
       built = @builder.build{ r2 << space[:first_message] }
       assert_equal SlotToReg , built.class
       assert_equal :r1 , built.array.symbol
     end
     def test_returns_slot_reverse
-      r2 = RiscValue.new(:r2 , :Message)
+      r2 = RegisterValue.new(:r2 , :Message)
       r2.builder = @builder
       built = @builder.build{ r2 << space[:first_message] }
       assert_equal SlotToReg , built.class
       assert_equal :r1 , built.array.symbol
     end
     def test_reuses_names
-      r1 = RiscValue.new(:r1 , :Space)
+      r1 = RegisterValue.new(:r1 , :Space)
       built = @builder.build{ space << r1 ; space << r1}
       assert_equal built.to.symbol , built.next.to.symbol
     end
     def test_uses_message_as_message
-      r1 = RiscValue.new(:r1 , :Space)
+      r1 = RegisterValue.new(:r1 , :Space)
       built = @builder.build{ message[:receiver] << r1}
       assert_equal RegToSlot , built.class
       assert_equal :r0 , built.array.symbol
@@ -105,7 +105,7 @@ module Risc
       @builder = Risc::MethodCompiler.new( @init ).builder(true, @init)
     end
     def test_inserts_built
-      r1 = RiscValue.new(:r1 , :Space)
+      r1 = RegisterValue.new(:r1 , :Space)
       @builder.build{ space << r1 }
       assert_equal Transfer , @init.risc_instructions.next.class , @init.risc_instructions.next
     end
diff --git a/test/risc/test_risc_value.rb b/test/risc/test_risc_value.rb
index eab9aaf8..20038feb 100644
--- a/test/risc/test_risc_value.rb
+++ b/test/risc/test_risc_value.rb
@@ -11,8 +11,8 @@ module Risc
 
     def setup
       Risc.machine.boot
-      @r0 = RiscValue.new(:r0 , :Message)
-      @r1 = RiscValue.new(:r1 , :Space)
+      @r0 = RegisterValue.new(:r0 , :Message)
+      @r1 = RegisterValue.new(:r1 , :Space)
     end
     def test_r0
       assert_equal :r0 , @r0.symbol