\documentclass [twocolumn] {article}
\usepackage{verbatim}
%
\topmargin=-0.75in
\textheight=9.0in \vsize\textheight
\textwidth=6.5in \hsize\textwidth
\parindent=0.0in
%
\renewcommand{\insert}[2]{
\newpage
\begin{flushleft}
\framebox{{\bf Source file:} {\tt #2}}
\end{flushleft}
\verbatiminput{#1}
}

\newcommand{\nnpinsert}[2]{
\begin{flushleft}
\framebox{{\bf Source file:} {\tt #2}}
\end{flushleft}
\verbatiminput{#1}
}

\begin{document}
%
\newpage
\setcounter{page}{1}
\setcounter{equation}{0}

{\scriptsize

\nnpinsert{tdgesv.f}{tdgesv.f}
\nnpinsert{dgesv.f}{dgesv.f}
\newpage ~~ \newpage
\nnpinsert{sgi-output}{sgi-output}
\nnpinsert{linux-output}{linux-output}
\nnpinsert{sun-output}{sun-output}
%
}
\end{document}
