Star Micronics SR-10/I5 user manual The Print Matrix, 0.0 oao

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Figure 9-l.	The letter “C” is created by printing 15 dots.		-
descenders	(such	as the lower case “p” shown) use the bottom	_ I
seven pins. As the printhead moves across the page (in either
direction-that’s		what is meant by bi-directional printing) it prints	-

one column of dots at a time. Each time a	dot	is supposed to
print an electromagnet inside the printhead causes		the appropriate	-
wire to strike the ribbon (making the SR- 1O/l	5 an impact printer).

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Figure 9-2.As the printhead moves across the page, each of the wires prints one row of dots.

THE PRINT MATRIX

All of the standard characters that the SR-lo/15 prints are formed from patterns of dots that are permanently stored in the printer’s ROM (read-only Memory). This includes all of the standard ASCII characters, the block graphics and special characters, the international character sets, the NLQ characters and the italic characters.

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