[Norm]

The 3F is a ?. Different encodings use that when they do NOT have a valid char to use.
Here's a quick demo program that shows how different encodings generate different results:

Code:

// Writing chars > ASCII or ???

import java.io.*;

public class Test8 {

   public static void main(String[] args) {
      String data =new String("\u00a7\u0080");
      // \u0080 written to file as 3F (?) with encoding CP437
      // \u0080 written to file as 3F (?) with encoding CP1254
      // \u0080 written to file as 80  with encoding 8859_1

      System.out.println("data=" + data); //data=§?
      String[] codePages = {// "8859_1", "CP1254", //NCR added these
                 "CP437", "CP737", "CP775", "CP850",
                 "CP852", "CP855", "CP857", "CP860",
                 "CP861", "CP862", "CP863", "CP864",
                 "CP865", "CP866", "CP869", "CP874",
                 "CP856", "CP858", "CP868", "CP870"
                };

      try {
         FileOutputStream fos = new FileOutputStream("Text8Output.txt"); // write to file
         BufferedWriter wr1 = new BufferedWriter(
                                new OutputStreamWriter(fos, codePages[0])); 
//java.io.UnsupportedEncodingException: Cp437       with 1.4.2  OK with 1.6.0
         wr1.write(data); 
         wr1.flush();
         wr1.close();
      }catch(Exception x) {
         x.printStackTrace();
      }
   } // end main()
} // end class