Call with HPGL2 [options]
   Options:
        -Ixx: where xx is the hex interrupt vector.
                          0x7b is the default.

        -Cx:  where x is the serial port 1 or 2.
                          COM1 is the default (Not Recommended!).

        -Lx:  where x is the parallel port 1, 2, or 3.
                          LPT1: is the default.

        -Ffilename: plot TO a file, where filename is the name of the file.
                          Default is to plot directly to the plotter.

        -P: No PageAdvance after plot.
                          Default is to send a page advance after every plot.

        -E: Disables the paper cutter.

        -V: Pen plotters need pen velocity.
                          Default is for line weights (electrostatic plotters).

        -R: Lets you make a number of extra copies.
                          Default is one copy.

        -M: Change plotting units to metric.
                          Default is inches.

        -Z: LaserJet III only. 
                          Use only with the LaserJet III printer.
                
        -J: PaintJet XL using a Serial port.
                          Not needed if you use the parallel port.

        -S: For use with ACAD Scripts or AutoSketch. 
                          AutoSketch hangs if HPGL2 is installed w/o using -S! 

        -A: For use with a printer/plotter RAM buffer. 
                          Removes error checking at the port.
     
        -?: or -H: Prints this message.
