tart: NOP
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LDA #1
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .CHK start</PRE>
The checksum is calculated as the simple arithmetic sum of all bytes starting
at the <I>starting_addr</I> up to but not including the address of the
<A HREF="#CHK">CHK</A> directive. The least significant byte is all that
is used.
<H2>
<A NAME="CODES"></A>CODES/NOCODES</H2>
The CODES/NOCODES directives can be used to alternately turn on or off
the genera