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Assigningthe characterdata with the IBM mode
Fundamentally, t he processto defineandprintdownloadedNLQcharacter
withthe IBMmodeis the sameas for draftcharacters,exceptthat youmust
supplyaboutfour times as much characterdata, and you must design the
characterwith the two passesof the printhead in mind.
Use the grid in Figure5-6 to helpplotthe data with the IBMmode.Dueto
the two-passprocess,NLQcharactemcan containup to 16dotsvertically.
First
m/.,,
...m45
pass
m:..
.,.m46
128
64
32
16
8
4
2
1
Dot data
Ist:
2nd:
Second
Dass
128 ASCII Code
Descender
64
Left space:
Width:
32
u/ = Descender x 128
a2 = (Left x 16) + Width
16
8
4
2
Figure S6. Use this grid (or one similar to it) to define your own NLQ characters with the IBM mode
To make the characterdata easier to calculate,put the first pass dots with
black circle on the grid when you are designingyour characters,and the
secondpass dots with whitecircle.Rememberthat adjacentdots may not
overlapon the samepass;in otherwords,if one dot is in a box, its adjacent
dot on the same pass may not be on a line. Therefore,to make smooth
characters,put the dots neededto overlapany spacesin a characterin the
appropriateplaces in the secondpass grid.
If weplotourcar-shapedsymbolforNLQ,thegriddatawilllooklikeFigure
5-7.
Thedefiningprocessisthesameas fordraftcharacters, e xceptthatyoumust
selectNLQ mode, and you mustdefine46 data. If you wish to print your
90
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