Not answering your question, but... Jinx wrote : > No PC involved unfortunately, this is completely stand-alone What input device is used that gives the user the flexibility in input format that you described before ? Maybe you can't change that, but must the user have that flexibility ? Jan-Erik -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist