title: mov ax, bx vs. mov ax, [bx]
body: <p>What is the difference between the following two lines?</p>
  
  <pre><code>mov ax, bx
  mov ax, [bx]
  </code></pre>
  
  <p>If <code>bx</code> contains the value 100h and the value at memory address 100h is 23, does the second one copy 23 to <code>ax</code>?</p>
  
  <p>Also, what is the difference between the two following lines?</p>
  
  <pre><code>mov ax, 102h ; moves value of 102h into register ax
  mov ax, [102h] ; Actual address is DS:0 + 102h
  </code></pre>