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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 | 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.
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