title: Shutting down computer with nasm
body: <p>Is it possible to shut down or kill the power (is there a difference?) to a computer from nasm. I know you can use this to reboot:</p>
  
  <pre><code>mov al, 0xFE
  out 0x64, al
  </code></pre>
  
  <p>Is there an equivalent for shutting down?
  I am making my own 16 bit OS.</p>