title: Decompiling a 1990 DOS application
body: <p>I have some crucial data written decades ago by an ancient 16bit DOS application.
  There are no docs, no source, and no information about the author. Just the 16 bit exe.
  I guess it's time for me to learn how to decompile stuff, since it seems the only way to restore file format.
  I've tried OllyDbg, it looks really great, but it can't 16 bit.</p>
  
  <p>So, is there a disassembler/debugger capable of working with such executables?
  Thanks.</p>
  
  <p>UPD: I know DOSbox, the app runs in it all right. The problem is, I don't need to run it, I need to understand the file format in which it writes data. Or maybe I don't know something about DOSbox and it can run as a debugger/decompiler as well? Or do you mean starting some old 16bit DOS debugger/decompiler in DOSbox? The latter sounds like an idea, but could you please name a decent DOS debugger, then?</p>