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2001/10/02
CHAPTER 6 EPSON - 6
3. EMULATION DETAILS
The following points should be borne in mind when using the printer in Epson FX-850 mode.
3.1. Ignored Commands
The following commands are ignored: the BEL control code (ASCII code 7) which is normally used to
sound a printer’s bell, the DC1 (ASCII 17) and DC3 (ASCII 19) control codes, used to enable and disable
a printer, the Esc 9 and Esc 8 commands, which normally enable and disable the out-of-paper sensor, the
Esc < and Esc U commands for enabling unidirectional printing and the Esc x control code for choosing
between near letter quality and draft printing.
In addition, commands that try to change the printer’s printing speed cannot do so, since the HL-Series
printers always print as fast as they can. Hence, the Esc s command, to select or cancel half-speed
printing mode, is also ignored, and the Esc Y escape sequence (Print Double-Speed, Double-Density
Image), performs the same function as the Esc L (Print Double-Density Image) command.
3.2. Resolution
The resolution of our recent printers is 600 dots per inch. (HL-2060 supports 1200dpi.) Some instructions
use fractions of an inch by which 600 is not exactly divisible, for example Esc J performs a line feed using
a line spacing of n/216". Similarly, there are graphics commands which specify resolutions of 72, 120 and
240 dots per inch. When a line spacing or graphic cannot be implemented exactly at 600 dots per inch the
printer approximates as closely as possible using 600 dots per inch.