title: Strange Value in EXE header
body: <p>I've seen a strange value placed in EXE header</p>
  
  <pre><code>00000000 :4D 5A 90 00 03 00 00 00 - 04 00 00 00 FF FF 00 00
  00000010 :B8 00 00 00 00 00 00 00 - 40 00 00 00 00 00 00 00
  00000020 :00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00
  00000030 :00 00 00 00 00 00 00 00 - 00 00 00 00 A8 00 00 00
  00000030 :00 00 00 00 00 00 00 00 - 00 00 00 00 A8 00 00 00 &lt;-
  </code></pre>
  
  <p>I don't know what is <code>A8</code> doing there but if I replace it with zeros my program doesn't execute.</p>
  
  <p>In one word: what is that?</p>
  
  <p>Also, could you give me also link to the full MS DOS header?</p>