title: Assembly Test Instruction
body: <p>I want to know what does this operation mean?</p>
  
  <pre><code>Test EDX, 200
  </code></pre>
  
  <p>I have <code>DWORD</code> value in <code>EDX</code> like:</p>
  
  <pre><code>1A1B1C00
  </code></pre>
  
  <p>When I do <code>test EDX, 200</code>
  and then a <code>JE</code>, jump is taken. Why? <code>EDX</code> is not equal to <code>200</code>.</p>
  
  <p>I want to know more about <code>Test EDX, 200</code> meaning.</p>