Usage: OutFile Width Height XDPI YDPI [BackColor]
PCXMAKE creates a monochrome PCX file named OutFile,
Width pixels wide, Height pixels high.
XDPI is the DisplayHorz resolution of the PCX file.
YDPI is the DisplayVert resolution of the PCX file.
BackColor is optional, and indicates whether the file
is initialized to white (1, default) or black (0).
Incode Systems, Inc.