User`s manual

7–6 Digital Emulation
Control Codes
A control code is a single (one byte) non–printing character that instructs the
printer to perform a specific operation. When the printer receives a control
character, it immediately performs the control operation instead of printing a
graphic character. LG06 and LG12 printers recognize two sets of control
characters:
• ASCII Control Codes (7–bit codes)
• Additional Control Codes (8–bit codes)
ASCII Control Codes
Table 7–1 defines the ASCII control codes recognized by the printer in
Digital emulation mode. These codes are located in columns 0 and 1 of the
DEC Multinational Character Set (page 7–5), and the column/row
coordinates from this chart are printed beneath the Mnemonic category in
Table 7–1. These control codes are available in a 7–bit data environment or
in an 8–bit environment if bit 8 is zero.
NOTE: On many computers, an ASCII control code can be sent from the
input keyboard by holding down the CTRL key while depressing
the key specified in Table 7–1.
Additional Control Codes
The additional control codes are 8–bit control characters defined by ANSI
and Digital unique sequences, and are available in an 8–bit data environment
when bit 8 is set to 1. Table 7–2 defines the additional control codes
recognized by the printer in Digital emulation mode. These codes are in
columns 8 and 9 of the DEC Multinational Character Set (page 7–5), and the
column/row coordinates from this chart are printed beneath the Mnemonic
category in Table 7–2.
The 8–bit additional control codes may be sent in 7–bit form as equivalent
escape sequences. Equivalent 7–bit escape sequences for the 8–bit additional
control codes are listed in Table 7–3. Control code conversion from 7–bit to
8–bit data environments, and vice versa, is discussed on page 7–11.