e whole block is written. This
is useful when using TASM to generate code that will be put into a PROM
so that all locations will have a known value. This option is often used
in conjunction with the -f option to ensure all unused bytes will have
a known value.
<H2>
d - Define a Macro</H2>
Macros are defined on the command line generally to control the assembly
of various IFDEF's that are in the source file. This is a convenient way
to generate various versions of object code from a single source file.
<H2>