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threeattributebytes,the first bytedescribesthe character’sleft space,the
secondbytedescribesthecharacterwidth.Andthethirdbytedescribestic
rightspace.Appropriateallocationofdatainthesethreebytesletsyouplace
the characterwhereyoulike withinthegrid.
UsethegridinFigure5-4tohelpplotthedata.Theverticaldefinitionofthe
characteris 18dots. Each bytethereforerepresentsa thirdof the vertical
definition.That’swherethenumbersdowntheleftsideofthegridcomein.
Noticethatthereis a numberforeachrowof dots andthateachnumberis
twicethenumberbelowit.Bymakingthesenumbersoftwowecantakeany
combinationof dots in a verticalcolumnand assignthem a uniquevalue.
Ifweplotourcar-shapedsymbolforNLQ,thegriddatawilllooklikeFigure
5-5.
Thedefiningprocessisthesameasfordraftcharacters,exceptthatyoumust
selectNLQ mode,and youmustdefine69 data.If you wish to printyour
NLQcharacter withtheregularcharacterset,theremarksregardingthesi-
multaneoususe of regularanddownloadcharactersin the draft character
sectionapplyequallyto NLQcharacters.
128
64
32
16
8
4
2
1
128
64
32
16
8
4
2
1
128
64
Data:
●1 !
●
i
●
I I , I
: .: ;
& -—
I
●
,0
,0,
-~ . .
1.-1
!
]0
I
ASCII Code 6?
Left space:
Character width: z;
Right space: o
Figure 5-5. Add the values of the dots into three bytes