title: double condition checking in assembly
body: <p>i'm beginning assembly, i'm using nasm for assembling the code,
  i'm trying to process a string residing in memory and change it, 
  i want to check if a byte is in a certain range (ascii) so i can decide what to do with it,
  i can't seem to figure how to check if a value is in a certain range, i know all about
  the different kind of jump flags but how can i combine 2 cmp statements ?</p>
  
  <p>my question is :
  how do i produce something similiar to this in assembly ?</p>
  
  <pre><code>if (x&gt;=20 &amp;&amp; x&lt;=100)
       do something
  </code></pre>
  
  <p>thanks alot !</p>