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Page 13-5GLOSSARY
Extended ASCII Some printer manufacturers have
implemented their own version of 8 bit
transmission. Extended ASCII allows
128 additional characters to be
displayed by the printer.
F
FCC Federal Communications Commission.
FF Form feed.
Firmware The pre-programmed EPROMs
installed in the ALLY PLUS (the
internal software).
Flow control Serial communication handshaking.
Form feed A control code that instructs the printer
to process the current page and print it;
a page end. The physical transport of
paper to the beginning of a new page.
G
GDDM Graphical Data Display Manager. An
IBM graphics software product.
GML Graphic Machine Language.
Graphic Windows A feature of Xerox printers.
H
Handshaking An exchange of signals between two
devices in a computer network, as a
prelude to data exchange. The method
of flow control used in serial
interfacing.
Hardware Any physical device in a computer
network.
Hewlett-Packard A California company that produces a
wide range of computer equipment and
peripherals.
Hexadecimal A base 16 numbering system. Numbers
are represented using digits 0-9 and
letters A-F.