HP PCL/PJL reference - PCL 5 Comparison Guide

ENWW Printer-Specific Differences 2-93
Media Source Command
The Paper (Media) Source command (?&l#H) for the DeskJet 1600C
uses a value of 5 for its optional sheet feeder and also supports a
value of 7 (autoselect). A value of 7 selects the current printer default
source. The user, through the application, may select a particular tray
for the first page or pages (for example, a fancy cover page), then
choose autoselect to pull paper from a default tray (for example,
containing standard paper). This is different than option 0, which
continues printing from the currently selected source. The “default”
source may be user-selected, or based upon the printer's own
algorithm.
Compression Method Command
The Compression Method command (?*b#M) for the DeskJet 1600C
supports Method 9 compression (compressed replacement delta row
encoding) in addition to compression methods 0, 1, 2, 3, and 5.
Method 9 (Replacement Delta Row Encoding)
Like Method 3, this method replaces only bytes in the current row that
differ from the preceding (seed) row. Unlike Method 3, the
replacement (delta) bytes may be encoded.
The replacement byte string (delta compression string) consists of a
command byte, optional offset bytes, optional replacement count
bytes, and the replacement data.
Command
Byte
Optional Offset Bytes Optional Replacement
Count Bytes
Data Bytes