Data General Dasher D461 User Manual page 114

Character
A member of a set of elements used to represent information.
Characters are classified in groups such as alphabetical, numeric, special
sign and symbol, and control characters that direct device operations.
Character code
A combination of bits that represents a character in a
character set.
Character set
A collection of characters grouped together for a special
purpose.
Command
A string of characters that combine to direct a device
operation. All 0411/0461 terminal operations are controlled with the
commands defined in the programmer's reference manual.
Cursor
A visible marker on the screen indicating a position. The 0411
terminal has an alphanumeric cursor, and the 0461 has both an
alphanumeric cursor and a graphics cursor. The alphanumeric cursor
identifies the character position destined to hold the next character for
display. For the 0411 and 0461 terminals, it may appear as a solid block,
blinking block, blinking underscore, or invisible.
The graphics cursor on the 0461 is a cross that indicates a picture element
(pixel) position on the screen. This position may be read by the host
computer under software control or transmitted to the host by the user.
The graphics cursor is useful when running certain graphics software
programs.
Data
A general expression for the information that moves through a
computer system or device.
Delimit
To establish the limits or bounds of something; some of the
0411/0461 commands require delimiter characters to mark their end.
Dot matrix
A rectangular pattern of dots used to form characters for
display, also called a character cell. The characters for the 0411/0461
terminal are all formed in a rectangular pattern that is 10 dots wide and
12 dots high (normal character spacing) or 12 dots wide and 12 dots high
(compressed character spacing).
Download
The process whereby data is transmitted from a host device
and retained in a receiving device. For the 0411/0461 terminal, the
custom-character definitions can be transmitted from the host computer
and retained in the terminal.
EIA Electronic Industries Association, an organization that establishes
standards for electronic equipment.
GI-2 Glossary