start on reworking sys calls

lib/register/instructions/syscall.rb

@@ -0,0 +1,17 @@
+module Register
+
+  # name says it all really
+  # only arg is the method syscall name
+  # how the layer below executes these is really up to it
+
+  # Any function issuing a Syscall should also save the current message
+  # and restore it after the syscall, saving the return value in Return_index
+
+  class Syscall < Instruction
+
+    def initialize name
+      @name = name
+    end
+    attr_reader :name
+  end
+end