Assigning the character dot pattern
Wewill use a tiny representationof a telephonesymbolfor our example.
1 2 3 4 5 6 7 8 9101112131415161718192021
22232425262728293031
32333435
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,youwillneedto compressthe
Dot Pattern.Datacompressionallowsyou to storemore downloadcharac-
ters than'withoutcompression.It is a more efficientuse of memory.The
printer will repeat the previous dot column when the current column
compressionmask bit is set to "l".
Filluptheadjacentdoteventheydonotprint,thencomparetheeachventcal
line to the left line. If the line is the same as the left one, write "l" in the
columnof the "compressionmask bit". If it is different,write"O".
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