static char sccsid
[] = "@(#)open.c 4.1 (Berkeley) %G%";
* Displays plot files on an HP7221 plotter.
* Cloned from bgplot.c and gigiplot.c by Jim Kleckner
* Thu Jun 30 13:35:04 PDT 1983
* Requires a handshaking program such as hp7221cat to get
* the plotter open and ready.