Tally Genicom Matrix Printer manual Definition of the Character Grid

Definition of the Character Grid

NLQ characters consist of 18 vertical dots and 12 hori- zontal dots.

Within this grid every num- bered line or gap can be oc- cupied, including the lowest and the furthest right line. You should, however, leave one or two columns empty, so that neighboring charac- ters do not touch.

For each column of the NLQ character it is necessary to de- fine 3 Bytes. Each bit of the data bytes corresponds to a certain value. The example on the right shows the as- signment of print dots to data bytes and the calculation of the values.

In order to determine the nu- meric value of a column, it is necessary to first of all add the values of the 3 bytes separa- tely. A byte with no print dot receives the numeric value 9.

128

64

32

16

8

4

2

1

128

64

32

16

8

4

2

1

128

64

First

Data Byte

Second Data Byte

Third Data Byte

1 2 3 4 5 6 7 8 9 10 11 12

128

64

32

16

8

4

2

1

128

64

32

16

8

4

2

1

128

64

128

64

= 229

4

1

16

8= 28

64 = 64

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