title: Assembly on the LC3 and a weird JSR command
body: <p>I'm trying to decipher some basic LC3 code and I'm thrown off by a specific line ..</p>
  
  <p><strong>Address</strong> </p>
  
  <pre><code>x3122 : 0100 01010 0110 0110
  </code></pre>
  
  <p>Now I understand that this is a JSRR opcode, but I'm thrown off by what comes after the opcode, specifically bits 10 and 9. Aren't those bits supposed to be 0?  </p>