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Assigning the character dot pattern
Wewilluse a tiny representationof a telephonesymbolfor our example.
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128
64
32
16
8
4
2
1
128
64
32
16
8
4
2
1
128
64
32
16
8
4
2
1
Compression
ma, k btt
Figure 5-3. Telephone symbol with LQ pica
Afteryouhavedesignedthecharacterpattern,youwillneedtocompressthe
DotPattern.Datacompressionallowsyoutostoremoredownloadcharac-
ters than’withoutcompression.It is a more efficientuse of memory.The
printer will repeat the previous dot column when the current column
compressionmaskbit is setto “l”.
Filluptheadjacentdoteventheydonotprint,thencomparetheeachventcal
lineto the left line. If the line is the sameas the left one, write“l” in the
columnof the “compressionmaskbit”. If it is different,write“O”.
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