The drivers shipped with the LaserWriter 810 are PostScript only drivers. In order to get the printer to print PCL, the Hewlett-Packard LaserJet IIP driver should be used. It is important to note that the LaserWriter Pro 810 does NOT support PCL5. The LaserWriter Pro 810 supports PCL4+ only. Use the corresponding Hewlett-Packard driver to get PCL functionality, LaserJet II, IIP, or III.