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The sample below shows the heart character printed in various styles.
Other considerations
Keep in mind that user-defined characters are stored in RAM, which
is not permanent. Whenever the printer power is turned off or your
computer sends an initialization (INIT) signal, all of the user-defined
characters are lost. For example, some computers send an INIT signal
each time BASIC is loaded or when certain application programs start
up, and most computers do it if you have to reset them. If the program
resets the printer with the ESC @ command, the ROM set is selected,
but the user-defined characters are not lost.
The IBM printer emulation mode has a different method of defining
characters. See page A-44 in the Command Summary if you are
interested.
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Graphics and User-defined Characters