/p>
<p>Although this program is very simple, some new ideas are introduced. </p>
<h3> MOV BL,40</h3>
<p>This line initialises BL to 40. </p>
<h3> Rep:</h3>
<p>Rep: is a label. Labels are used with Jump commands. It is possible for programs 
  to jump backwards or forwards. Because of the way numbers are stored, the largest 
  jumps are -128 backwards and + 127 forwards. Labels must begin with a letter 
  or the _ character. Labels may contain letters, digits and the _ character. 
  Destination labe