User guide

General Information About the LA75 Plus Companion Printer
1.2 DEC PPL2 Extensions and Exceptions
Table 1–2 DEC PPL2 Exceptions
Exceptions
Bell
LA210, LA120, LA50 alias Device Attributes Report (DAR) parameters
Control Representation Mode (CRM)
Protocol switching
Horizontal Page Width Alignment (DECHPWA)
Bar code printing (DECSBA, DECBAR)
1.3 Alternate Protocols Supported by the LA75 Plus
Companion Printer
This part of the manual describes the DEC PPL2 protocol as implemented on
the LA75 Plus Companion Printer. The LA75 Plus Companion Printer also
emulates the protocol for printing on the IBM Proprinter X24E. The protocol
is changed using either the Select Other Coding System (SOCS)/Return from
Other Coding System (ROCS) command combination, or the Select IBM
Proprinter Mode (DECIPEM) command. These commands are described in the
Command Dictionary.
1.4 Color Printing
For color printing the LA75 Plus Companion Printer uses a ribbon with four
colors. The four ribbon colors can be selected individually and in combinations,
making it possible to print up to eight different colors:
Yellow — (ribbon color)
Magenta — (ribbon color)
Cyan — (ribbon color)
Black — (ribbon color)
Red — (magenta and yellow)
Green — (yellow and cyan)
Blue — (magenta and cyan)
White — (no printing)
The LA75 Plus Companion Printer supports the Select Graphic Rendition
(SGR) color text parameters listed in the Command Dictionary.
In Sixel Graphics mode, the LA75 Plus Companion Printer prints black and
white or color sixels, using the 8-color columns from the HLS and RGB color
maps in the Sixel Graphics chapter of the Reference Manual.
General Information About the LA75 Plus Companion Printer 1–3