User`s manual

7–119Digital Emulation
Processing Unused Control Strings
The printer ignores all unused control strings. Unused control strings include
all Operating System commands (OSC), Privacy Messages (PM), and
Application Program commands (APC), as well as all Device Control strings
(DCS), unless they are within Sixel Graphics mode. The following table
describes the different control strings:
Types of Control
Strings
8–bit
Mnemonic/
HEX
7–bit
Mnemonic/
HEX
Device Control
Strings
DCS
90H
ESC P
1BH 50H
Operating System
Commands
OSC
9DH
ESC ]
1BH 5DH
Privacy Messages PM
9EH
ESC ^
1BH 5EH
Application Program
Commands
APC
9FH
ESC _
1BH 5FH
Control string formats appear in the following ways:
Control String
Introducer Data String
String
Terminator
DCS P...P I...I F D...D ST
OSC D...D ST
PM D...D ST
APC D...D ST
In the above table, P = parameters; I = intermediate characters; F = final
character; D = data; and ST = string terminator (9CH).
Process unused control strings as follows:
• After DCS begins processing the introducer sequence, it will:
1) enter Sixel Graphics mode if the final character is a q
2) process any applicable CO received
3) enter Text mode if ESC, CAN, SUB, ST, or a C1 is received
4) ignore any GL or GR code received