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I
DEFINING YOUR OWN CHARACTERS WITH IBM
MODE
Downloadingfonts in IBM mode requires downloadingcharacter Dot
PatterndataandcharacterIndexTabledata.Dotpatterndatacontrolswhich
pins fire whenprintinga character.IndexTabledatais placedin a "lookup
table" that provides informationon where Dot Pattern data is stored in
memoryand definescertainattributesof the character.
Assigning the download character set
You can defineone or more downloadcharactersets for later use in IBM
mode. Before you start to design your characters,you must define what
characterset(s) you want to download.
The characterwidthon whichyou designthe charactersdependsupon the
characterset as shownbelow:
Characterset
Characterwidth
CharacterID
Draft characters
9
0
LQ pica characters
35
1
LQ elite characters
29
2
LQ proportional
17-41
3
After you have decided your downloadcharacter set, you must tell the
printer where'thedownload characterdata to be stored, and how many
downloadcharactersets you will define.
The firstdownloadfontareastartsfrom<800F>h,andyoumustenterOfor
the Format byte. This Format byte indicatesto the printer that the RAM
cartridgehas storedthe downloadcharacterset.
Followingtheformatbyte,youmustentertheCharacterIDdata.If youwant
to definemore characterset, add 128to the CharacterID data.
The secondarea starts from <891l>h, the third area starts from <9212>h,
and the last area starts from c9B13>h.But you need not enter the Format
byte for these area.
90
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