Tally Genicom Matrix Printer manual What is a Character Cell?, 2Character Cells

What is a Character Cell?

A character cell is the rectangular array of locations at which dots can be printed to form one character.

All character cells for a given monospaced font at a given pitch are the same size. If you print a line of characters with no countermanding motion instructions, then no character cell will impinge horizontally on the character cell of an adjacent character. You can determine character cell width in a monospaced font by measuring the distance from the leading edge of, say, an uppercase “E” to the leading edge of an adjacent uppercase “E”.

In an impact-matrix printer font, the printed portion of a character is often centered horizontally in the character cell. There might be a fixed number of dot columns on either end of the character cell that are never printed. This is analogous to the side bearings in a typeset character.

Figure 4-2Character Cells

In the oversized font, on the other hand, characters are left-justified in the cells. This lets you print a larger character when you are printing, say, one huge character on a sheet. The 7265 printer prints as much of an oversized character as will fit between the margins. If your character is going to be clipped at the right margin, then you might rather clip the side bearing than clip a printed portion of that character.

In the oversized font, the topmost dot in the uppercase “E”, for instance, is centered on the upper boundary of the character cell. The lowest dot on the descender of the lowercase “j” is centered on the lower boundary of the character cell.

7265 Programmer’s Manual	68
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