HP PCL/PJL reference - Printer Job Language Technical Reference Manual

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Chapter 5. Job Separation Commands
Chapter 5 describes the JOB and EOJ commands, which are used in
combination to define job boundaries and provide job-related
feedback, such as job completion.
Chapter 6. Environment Commands
This chapter explains setting the printer to a known state. The
DEFAULT, INITIALIZE, RESET, and SET commands are explained
here.
Chapter 7. Status Readback Commands
Chapter 7 describes status readback, the format of status readback
responses, using software tools to interpret status readback, and the
commands associated with status readback (INQUIRE, DINQUIRE,
ECHO, INFO, USTATUS, and USTATUSOFF). This chapter also
covers the processes involved in job recovery and monitoring the
printer control panel.
Chapter 8. Device Attendance Commands
Chapter 8 describes the commands used to display messages on the
printer control panel: the RDYMSG, OPMSG, and STMSG
commands.
Chapter 9. PJL File System Commands
Chapter 9 describes the commands used for managing a printer-
based disk drive, or other printer-based mass storage. The
commands include FSAPPEND, FSDIRLIST, FSINIT, FSMKDIR,
FSQUERY, FSUPLOAD, FSDOWNLOAD, and FSDELETE. These
commands provide the capability to initialize the mass storage, make
directories, list directories, and download, upload, delete, and
append files.
Chapter 10. Job Management
Chapter 10 describes the job management features found on the
HP LaserJet 8100 and 8500 printers.