diff --git a/lib/asm/arm/builder_b.rb b/lib/asm/arm/builder_b.rb
index 520dc7fa..c6037a2c 100644
--- a/lib/asm/arm/builder_b.rb
+++ b/lib/asm/arm/builder_b.rb
@@ -87,7 +87,8 @@ module Asm
           @use_addrtable_reloc = true
           @addrtable_reloc_target = arg1
         else
-          raise Asm::AssemblyError.new(Asm::ERRSTR_INVALID_ARG, arg1)
+          puts "Invalid #{arg1.inspect}"
+          raise Asm::AssemblyError.new(Asm::ERRSTR_INVALID_ARG, arg1.inspect)
         end
       end
 
diff --git a/lib/asm/arm/code_generator.rb b/lib/asm/arm/code_generator.rb
index 885a8dfa..449bc71a 100644
--- a/lib/asm/arm/code_generator.rb
+++ b/lib/asm/arm/code_generator.rb
@@ -33,18 +33,12 @@ class Asm::Arm::CodeGenerator
     args.each { |arg|
       if (arg.is_a?(Array))
         if (arg[0] == :reg)
-          node.args << Asm::RegisterArgNode.new { |n|
-            n.name = arg[1]
-          }
+          node.args << Asm::RegisterArgNode.new(arg[1])
         end
       elsif (arg.is_a?(Integer))
-        node.args << Asm::NumLiteralArgNode.new { |n|
-          n.value = arg
-        }
+        node.args << Asm::NumLiteralArgNode.new(arg)
       elsif (arg.is_a?(Symbol))
-        node.args << Asm::LabelRefArgNode.new { |n|
-          n.label = arg.to_s
-        }
+        node.args << Asm::LabelRefArgNode.new(arg.to_s)
       elsif (arg.is_a?(Asm::Arm::GeneratorLabel) or arg.is_a?(Asm::Arm::GeneratorExternLabel))
         node.args << arg
       else
@@ -55,7 +49,7 @@ class Asm::Arm::CodeGenerator
     @asm.add_object Asm::Arm::Instruction.new(node)
   end
 
-  %w(adc add and bic eor orr rsb rsc sbc sub mov mvn cmn cmp teq tst b bl bx swi strb
+  %w(adc add and bic eor orr rsb rsc sbc sub mov mvn cmn cmp teq tst b bl bx swi str strb ldr ldrb 
   ).each { |inst|
     define_method(inst) { |*args|
       instruction inst.to_sym, *args
diff --git a/lib/asm/nodes.rb b/lib/asm/nodes.rb
index 847c1ed4..14fe2344 100644
--- a/lib/asm/nodes.rb
+++ b/lib/asm/nodes.rb
@@ -37,6 +37,9 @@ module Asm
 
   class RegisterArgNode < ArgNode
     attr_accessor :name
+    def initialize name
+      @name = name
+    end
   end
 
   class RegisterListArgNode < ArgNode
@@ -45,18 +48,28 @@ module Asm
 
   class NumLiteralArgNode < ArgNode
     attr_accessor :value
+    def initialize val
+      @value = val
+    end
   end
 
   class NumEquivAddrArgNode < NumLiteralArgNode
   end
   class LabelRefArgNode < ArgNode
     attr_accessor :label, :label_object
+    def initialize label , object = nil
+      @label = label
+      @label_object = object
+    end
   end
   class LabelEquivAddrArgNode < LabelRefArgNode
   end
 
   class ReferenceArgNode < ArgNode
     attr_accessor :argument
+    def initilize arg
+      @argument = arg
+    end
   end
 
   class ParseError < StandardError