Epson LQ-1010, User Manual

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User-defined Characters
There is one restriction in designing characters. Dots in the same row
may not print in adjacent columns. This means that there must be an
empty dot position both to the left and right of each dot that prints.
This is true in draft, Letter Quality, and proportional mode.
Defining Your Characters
The first step in defining characters is to place the dots on a grid just as
you want them to print. The examples shown here, like the ones in the
graphics section, use an x to represent each dot.
In the illustration below, you see a draft grid with a simple user-
defined character planned on it.
Now you translate the dot pattern you’ve created on paper to a
numeric format so you can send the data to your printer. Every dot has
an assigned value. Each vertical column (which has a maximum of 24
dots) is first divided into three groups of eight dots. Each group of eight
dots is represented by one byte, which consists of eight bits. Hence, one
bit represents one dot.
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Software and Graphics