The PC_OCD_ENDPAGE box contains the printer command or commands which the Universal Printer Driver issues to end a page.
For the Diconix 150 Plus, no command is required at the end of each page; therefore, the PC_OCD_ENDPAGE box is empty.
For the HP LaserJet IIP, no command is required at the end of each page; therefore, the PC_OCD_ENDPAGE box is empty.