<strong>PEEK</strong> and <strong>POKE</strong> commands.
For instance, <strong>X = &amp; $1</strong> places the memory location of the $1 string variable into X. You can then put data into it with eg <strong>POKE 77 X</strong> (put 77 into the memory location pointed to by X).</li>
<li><strong>Labels</strong> -- Such as <strong>box_loop:</strong> etc. Used by <strong>GOTO</strong> and <strong>GOSUB</strong>, they must have a trailing colon and be at the start of a line.</li>
<li><strong>Ending</strong> -- 