ession.
The optional fill_value can also be any valid expression. If <I>fill_value</I>
is not provided, a default value of 255 ($FF) is used.
<H2>
<A NAME="IFDEF"></A>IFDEF</H2>
The IFDEF directive can be used to optionally assemble a block of code.
It has the following form:
<PRE>&nbsp;&nbsp;&nbsp; #IFDEF&nbsp; macro_label</PRE>
When invoked, the list of macro labels (established via <A HREF="#DEFINE">DEFINE</A>
directives) is searched. If the label is found, the following lines of
code are assembled. If n