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ML320/321 Turbo Printer Handbook 47
C
hapter 4: Working with Software
This chapter covers the fundamentals of setting up commercial software packages for
use with your printer. Be sure to read your software documentation carefully for more
details.
Basic Terminology
Before we start, let’s examine a few terms with which you may not be familiar.
Printer Commands
If you’re using commercial software with an appropriate printer driver (see
“Printer Drivers” below), the printer commands will normally be sent to the
printer by your software and you won’t even need to think about them.
Printer commands are signals sent by your PC to the printer which guide and control
its operation. Printer commands tell the printer what character pitch to use, what font
to use, what margins to use, whether to use single or double spacing, when to en-
gage/disengage double width or double height printing, etc.
Printer commands can be sent in decimal, ASCII, or hexadecimal form. The values
(decimal/ASCII/hexadecimal) for each type of command depend on which emula-
tion is active (see Appendix C for a listing of printer commands for each emulation).
With only a few exceptions, printer commands begin with the ESC character, decimal
27 (hexadecimal 1B), which serves as signal to the printer that what follows is to be
interpreted as a command rather than just a string of characters. Some printer com-
mands expect you supply a numerical value, representing tab stops, line spacing, etc.