What Are Escape Sequences; Mtpl Sequences; Control Codes; The $$ Procedure - Tally Dascom 2810 User Manual

Emulations

What are escape sequences?

An escape sequence consists of an ESCape control character (ESC = decimal
27 or hexadecimal 1B) followed by one or more charac- ters, which represent
commands to the printer. Please note that this escape character has nothing to
do with the ESC key on your computer keyboard.
For example, the control character ESC followed by the character "4" tells your
printer to print the subsequent text in italics.

MTPL sequences

Apart from the Escape sequences and control codes your printer is equipped
with MTPL sequences. These sequences provide a large number of additional
ways to control your printer. Many functions can only be carried out using the
MTPL sequences as you will see when you look at the list of available command
codes.

Control codes

Control codes give simple instructions to the printer to do a specific function.
Unlike escape sequences, control codes do not begin with the ESC control code.
Instead, they consist of special single-character non-printing commands (e.g. LF,
FF, DC2).

The $$ procedure

Most of the printer functions can be selected with control sequences (ESC
sequences). For this purpose, the signal character ESC, followed by the specific
sequence must be transmitted from the computer to the printer.
The printer replaces $$ characters in the data stream with ESC (hex. 1B) if the
parameter Escape=ESC+$$ is selected in the printer menu.

Example

In the MTPL + IBM Proprinter emulation, bold print can be switched on by the
sequence <ESC>E and can be switched off with the sequence <ESC>F.
Input
Output
This procedure is significant when you are working with older text
STOP
programs that do not have any or an inadequate printer driver. It is also
possible to insert ESC sequences in normal ASCII texts (e.g. program
listings) with this procedure. The function of the ESC character remains
unaffected.
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Highlight the word $$E Printer $$F with bold print
Highlight the word Printer with bold print
User Guide