AMT Datasouth 41AY89AR777 - Manual (Page 103)

4.5.2 DS-180 GRAPHICS (ANADEX 9500/9501 COMPATIBLE)
When the printer is placed into the DS-180 graphics mode it no longer prints
characters in predefined groups. In this mode of operation the user can control
each print wire independently. This section will instruct the user on how^ to
manipulate the print wires in order to “draw” a specific figure. The user should
understand that the following instructions are intended only to describe the
fundamentals of encoding, not to demonstrate the most efficient way of
programming a particular figure. This is left to the programming expertise of
the user.
The user can control the top six print wires in DS-180 graphics, (see
Figure 4.11). A “column” is then six dots high and one dot wide.
PRINTWIRE
NUMBER
DECIMAL
VALUE
32
16
8
4
2
1
Figure 4.11 Print Wires (DS-180 Graphics)
As shown in Figure 4.11, each print wire has a decimal value assigned to it. A
print wire is fired by sending the decimal value that corresponds to that print
wire. For example, to fire print wire number 2, the user would send CHR$(16). If
more than one print wire is to be fired, the decimal values of the print wires to be
fired are added, and the sum is sent. For example, to fire print wires number 2
and number 4, CHR$(20) would be sent. Print wire number 2 has a decimal value
of 16 and print wire number 4 has a decimal value of 4. The sum of the decimal
values is 20.
In order to print a figure using the individual print wire control described above,
the figure must first be plotted on graph paper as individual dots. Because of the
high resolution used in graphics, such as 72 dots per inch it will be necessary to
plot the figure at a scale greater than 1 to 1 in order to plot individual dot
positions.
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