Unisys EFP9800 manual Define a Character

NCR 5021 Printer Emulation Commands

WARNING

Due to the electrical characteristics of the printer, neighboring dots cannot both be fired within a horizontal row. Damage to the print mechanism may result. It is the responsibility of the character set creator to insure that this can not occur.

Altering a character in the character set is a two step procedure. The first step is to define the new character and the second step is to download the new character to the printer.

Define a Character

Each character in the character set is defined by seven 12-bit dot patterns. Dots in a horizontal row are really half dots, otherwise, characters would be grossly disproportionate.

First, map a 12x7 grid and place dots on the grid to form the desired character. Care must be taken so that two neighboring dots within a row of dots are not both fired. This rule applies to both intra-character and inter-character dots.

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