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Appendix C
CTS Clear To Send. Status signal to the printer indicating
the host is ready to receive data/status signals from
the printer.
CVFU Centronics® direct access Vertical Format Unit.
D
data bits Binary information sent to the printer; a character set
grouping containing letters, digits, and punctuation
marks to be printed, or control codes to move paper,
format text and graphics, and position the text and
graphics on the page.
DAVFU Direct Access Vertical Format Unit. Also known as
NVFU. See also NVFU.
DC Data Controller.
DCD Data Carrier Detect. Status signal to the printer. The
ON condition is required for the printer to receive
data.
decipoint One tenth of a point. A unit of length equal to 1/720
inch. See also point.
default A value, parameter, attribute, or option assigned by a
program or system if another is not specified by the
user.
descender The portion of a printed, lowercase character that
appears below the base line. For example, /g/ /j/ /p/
/q/ and /y/ all are characters with lowercase
descenders.
diagnostic Pertains to the detection and isolation of printer
malfunctions or mistakes.
DIP Dual In-line Package. A method of packaging
semiconductor components in rectangular cases with
parallel rows of electrical contacts.
DIP switch A DIP equipped with switches. A typical DIP switch
has from four to ten individual switches mounted in
its package. The individual switches are typically
toggle, rocker, or slide switches.
disable To deactivate or set to OFF.
diskette A thin, flexible magnetic disk containing software
such as test and diagnostic programs, initialization
files, and all font specifications for the printer.
DP Data Processing. (See also HS for Draft Print).
draft A limited dot font used for rough copy; characterized
by low print quality but fast printing speed.
DRAM Dynamic Random Access Memory.