random checkin

still suffering -1 trauma

lib/risc/instructions/label.rb

@@ -22,7 +22,7 @@ module Risc
       class_source "#{@name} (next: #{self.next.class.name.split("::").last})"
     end
 
-    def sof_reference_name
+    def rxf_reference_name
       @name
     end
 

lib/risc/instructions/load_constant.rb

@@ -24,8 +24,8 @@ module Risc
       when String , Symbol
         @constant.to_s
       else
-        if( @constant.respond_to? :sof_reference_name )
-          constant.sof_reference_name
+        if( @constant.respond_to? :rxf_reference_name )
+          constant.rxf_reference_name
         else
           constant.class.name.to_s
         end

lib/risc/instructions/setter.rb

@@ -21,7 +21,7 @@ module Risc
       @register = register
       @array = array
       @index = index
-      raise "index 0 " if index == 0
+      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)