HP PCL/PJL reference - PCL 5 Comparison Guide

2-4 Printer-Specific Differences ENWW
Raster Graphics Adaptive Compression (IIIP)
Adaptive compression was added to the PCL language with the
introduction of the HP LaserJet IIIP printer. Adaptive compression (or
method 5 as it is referred to) is a method for compressing raster data
using the raster Set Compression Method command (parameter
value 5). (Refer to the Set Compression Method command in the
PCL 5 Printer Language Technical Reference manual for detailed
information on using this compression technique.) Also, refer to
Chapter 5 in this document, “Raster Graphics Adaptive Compression
(Method 5)” for additional information.
HP LaserJet 4 Printer
Several new PCL features were added to the PCL 5 language with the
release of the HP LaserJet 4 printer. These new features are
summarized in Table 2-3. Most of these features are described in the
revised PCL 5 Printer Language Technical Reference Manual (part
number 5961-0509). (This revised technical reference manual is
supplied as part of the Technical Reference Documentation Package
which can be obtained by ordering part number 5961-0601.) In
addition, there are some additional differences for the HP LaserJet 4
printer that are not covered in the technical reference manual but are
described below.
Note The HP LaserJet 4M printer, in addition to PCL, contains PostScript
and a LocalTalk I/O for printing in the Macintosh environment. PCL
operation and the PCL internal fonts for this printer are identical to the
HP LaserJet 4 printer. Thus, for PCL information for the
HP LaserJet 4M printer, refer to the HP LaserJet 4 printer features.