Star Micronics LC24-20 Assigning the character dot pattern, Telephone symbol with LQ pica

Assigning the character dot pattern

We will use a tiny representation of a telephone symbol for our example.

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128	~ I I ~ ~ ~ ~ I	I I I	I	I I	I	I I	I i	I I I	I I I	I	I
	a,	I- I I-I		I- I	l-r	l-r	I-	I-	I-	1	1
64 — — —
32	— — —
16 — — —
8	— — —
4

2— — —

128

. . 1 -

04

32

16

6

4

2

1

128

64

32

16

8

4

2

1

32333435

~ I

I

~ !

●

●

●

￿●

ii

figure 9-3. Telephone symbol with LQ pica

After you have designed the character pattern, you will need to compress the Dot Pattern. Data compression allows you to store more download characters than without compression. It is a more efficient use of memory. The printer will repeat the previous dot column when the current column compression mask bit is set to “l”.

Fill up the adjacent dot even they do not print, then compare the each veritcal line to the left line. If the line is the same as the left one, write “l” in the column of the “compression mask bit”. If it is different, write “O”.

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