HP 2624 User Manual

Introducing the HP 2624A
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Figure 1-6. User Keys Definition Menu
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Figure 1-7. Default User Key Labels
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Figure 1-8. Sample User-Supplied User Key Labels
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Two types of character sets can be stored within the ter-
minal:
alphanumeric sets and microvector sets. The al-
phanumeric sets support the primary use of the terminal:
displaying textual and numeric information. Characters
are designed around a basic 7X9 dot matrix with provision
for lowercase descenders. The
characters are embellished
by use of
the half-shift. With this type of set, the character-
to-character spacing of two dots is hardwired. This
prevents the design of characters that would form con-
tinuous horizontal lines. All 15 scan lines of the row are,
however, available so
that vertically contiguous symbol
segments
can be designed. An example of this is the three-
row-high integral sign found in the math symbol set.
Microvector sets
use the entire 9-dot-by-15-scan-line char-
acter cell without the half-shift. This allows characters to
be designed with
both horizontal and vertical continuity.
This type of
set finds its greatest application where a min-
imal set of graphic kernels is needed to represent more
complex pictorial information.
The line drawing set which
can be used to display complex
data entry forms on the
screen is an example of such a set.
DISPLAY MEMORY
In its standard ordering configuration, the HP 2624A in-
cludes 16K bytes of display memory. As
an option, however,
you
may order an additional 16K bytes.
Each displayable character uses one byte of display
memory. Each change of character set or video enhance-
ment generates a 2-byte non-displaying control sequence
which is embedded
between the displayable characters in
display memory. Similarly, each format mode function
(start field, start edits, and stop field) generates a 2-byte
non-displaying control sequence. A non-displaying ter-
minator also generates a 2-byte control sequence.
Character set changes and video enhancement changes
which occur at the same character position are combined
into a single 2-byte control sequence. Similarly,
"start
field" and "start edits" functions which occur at the same
character position are also combined into a single 2-byte
control sequence.
15
Scan
Lines
Figure 1-9. Alphanumeric Character Generation
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HP 2624 Specifications

General

Brand	HP
Model	2624
Category	Touch terminals
Language	English