HP L5 Media Source Command, Compression Method Command, Method 9 Replacement Delta Row Encoding

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

2-94 Printer-Specific Differences