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Table 5-1. Graphics modes
Alternate
Horiz. density
Option
Code
m
(dots/in.)
Single-density
ESC K
0
60
Double-density
ESC L
1
120
High-speed double-density*
ESC Y
2
120
Quadruple-density*
ESC Z
3
240
CRT I
none
4
80
Plotter (1:1)
none
5
72
CRT II
none
6
90
Double-density plotter
none
7
144
*Adjacent dots cannot be printed in this mode.
Modes 4-7 in the table are special modes that alter the horizontal
density to give proportions of a computer monitor (the CRT modes),
or to match the vertical density so as to give round circles (the plotter
modes).
In two modes, high-speed double-density and quadruple-density, the
print head cannot print two consecutive dots with the same pin, so
that it can print dots in only half the possible dot positions in any one
row. The higher density means that the resolution of the pattern is
better than in single-density mode. When you design patterns in these
two modes, however, you must see that no dots overlap.
Reassigning a graphics mode
Another graphics command lets you assign a different eight-pin
graphics mode to one of the specific eight-pin graphics commands. You
can use it with graphics software programs to quickly change the
density and proportions of your printouts. Changing the graphics
option changes the width without changing the height.
The command for reassigning a graphics mode is ESC ? c m. In this
command, c is a letter designating one of the four alternate graphics
codes (K, L, Y, or Z) and m is the mode number of the new mode, as
listed in Table 5-1.
For example, to change the ESC K command to select the CRT I
screen graphics mode, the command in BASIC would be the following:
LPRINT CHR$(27);"?K";CHR$(4);
Graphics and User-defined Characters
5-9