Fire-Lite PRN-6 Reference-Manual - Manual (Page 31)

The $$ procedure
Most of the printer functions can be selected with control sequences (ESC
sequences). For this purpose, the signal character ESC, followed by the
specific sequence must be transmitted from the computer to the printer.
This ESC character is automatically substituted when two $ characters ($$)
are placed immediately after each other in the text and is transmitted to the
printer or if the parameter Escape=ESC+$$ is selected in the printer menu.
Example:
In the MTPL + IBM Proprinter emulation, bold print can be switched on by
the sequence <ESC>E and can be switched off with the sequence
<ESC>F.
Input: Highlight the word $$E Printer $$F with bold print
Output: Highlight the word Printer with bold print
This procedure is significant when you are working with older text pro-
grams that do not have any or an inadequate printer driver.
It is also possible to insert ESC sequences in normal ASCII texts (e.g.
program listings) with this procedure. The function of the ESC character
remains unaffected.
The $$ procedure
2 - 2
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