Tally Genicom T5023+ - Manual (Page 37)

Programming interface (General) Character tables
T5023/5023+ - Programming Guide 27
where each dot is to be printed.
Characters defined by the user are copied by means of ESC sequences into the me-
mory of the document printer. It is possible to switch over at will between the normal
character set and that defined by the user
.
Graphics
Via the document printer simple pictures and/ or diagrams can first be presented
on the basis of standard or graphics characters or symbols defined by the user
on the one hand and the formatting possibilities (for example, line spacing, tabs,
highlighting) on the other hand. The structure of such semi- graphics can be con-
trolled by programs with corresponding ESC sequences. The production of se-
mi- graphics on the basis of character sets is, in principle, the connecting of
individual characters over several lines.
Example:
By switching over to a graphics mode special graphics commands become
available through which drawings, diagrams or pictures can be printed as dot
graphics. Each picture dot is encrypted as a number sequence and transferred
to the printer. The appearance of dot graphics can be influenced by setting the
dot density, whereby a maximum density of 180 x 360 dots per inch is possible.
The document printer works in various graphics modes. A graphics mode is
identified by the number of needles addressed during printing (8 or 24) and the
horizontal dot spacing (60 to 360 dots per inch).
The production of dot graphics is in principle the connecting of dot data over se-
veral lines. The line spacing can be set in such a way that no spaces arise bet-
ween the lines in a picture.