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Macro
A
group of settings that can be saved and recalled by pressing a
sequence of buttons. SelecType has four macros.
Main menu
in SelecType, the main menu displays the four modes:
*Load
Macro,
*Change Macro, *Change Defaults, and *Print Out Settings.
Number systems
Three number systems are commonly used with printers:
Decimal
is base 10 and
uses
the digits 0, 1, 2, 3,4, 5, 6, 7, 8, and 9.
(This is the most familiar system.)
Hexadecimal
(hex) is base 16 and uses the digits 0, 1, 2, 3, 4, 5, 6,
7, 8, 9, A, B, C, D, E, and E This is frequently used
by
programmers.
Anv decimal number between 0 and 255 can be expressed by a two-
digit hex number.
Binary
is base 2 and uses only the digits 0 and 1. All information in
computer systems is handled in binary form representing electrical
signals that are ON
or
OFF A binary digit is often called a bit; any
decimal number between 0 and 255 can be expressed by an eight-bit
binary number.
One-inch skip
A SelecType setting that causes the printer to stop printing, skip over
a perforation in continuous-feed paper, then resume printing again.
Most application programs handle this
task,
but it may be useful
when listing programs.
Paper bail
The part of the printer that holds the paper against the platen.
Paper-out sensor
A small switch behind the platen that sends a signal when it is not in
contact with paper
Parallel interface
An interface is the connection between the computer and the printer.
There are two types: a parallel interface transmits data one character
or
code
at a time, and a serial interface transmits data one
bit at a
time.
GL-6
Glossary