Echelon Neuron - Manual (Page 168)

SUBHEAD (Listing Control)
The SUBHEAD directive specifies the text for the subheading line of the
assembly listing file (produced by specifying the --listing keyword on the
command line; see Output Files).
See also LIST (Listing Control), NOLIST (Listing Control), and PAGE (Listing
Control).
Syntax:
The SUBHEAD directive requires a character or string as its argument and
cannot have a label. The characters that follow the SUBHEAD directive, and
any whitespace that follows the directive, are used as the subheading. The
argument for the directive is terminated by the end of the line or by a semicolon.
SUBHEAD string
If the string argument for the SUBHEAD directive is empty, the subheading line
is cleared. The specified subheading appears on all subsequent pages of the
assembly listing until another SUBHEAD directive is encountered. The
SUBHEAD directive itself does not appear in the listing file.
158 Neuron Assembler Directives