32 Line Matrix Printer LinePrinter Plus Programmer's Reference

Chapter 4 Overview

Epson Emulation Exceptions and Differences

Because of mechanical differences between your line matrix printer and

Epson printers (moving printhead serial matrix printers), some Epson features

are approximated or not supported.

• Epson codes that produce different behavior in your printer are indicated

by a “dagger” (

†

) in the Control Code Index.

• The Epson emulation supports the following fonts: DP, NLQ Serif and

Sans Serif, Draft with 10 cpi, 12 cpi and 15 cpi in either condensed or

normal widths, and OCR A and OCR B in 10 cpi. Condensed printing at

10 cpi in DP quality maps to 17.1 cpi. Character pitches other than 10 DP

cpi map to 20 cpi in DP and 17.1 cpi in NLQ.

• Epson bit-image graphics are supported, including all plotter and CRT

densities.

• Many character sets are available, including IBM-PC Graphics (IBM Code

Page 0437) and Epson. You can configure the zero character to contain a

slash or no slash.

• The Double Wide print control codes (ESC W, SO) double character

width, but

not

inter-character spacing, unlike the Epson FX-1050. The

formulas for total character spacing are as follows:

Epson FX-1050 2 (char + 1 dot + space)

Epson Emulation 2 (char + 1 dot) + space

• The Condensed Print (SI) control code condenses character width but

not

inter-character spacing, unlike the Epson FX-1050 which condenses both

character width and spacing.

• If one or more Backspace control codes follow directly after a Bit Image

Graphics command (ESC K, ESC L, ESC Y, or ESC Z), the printer will

backspace into the graphic pattern, the number of dots depending on the

current cpi setting. For an Epson FX-1050 printer, one Backspace will

send the logical printhead directly to the beginning of the graphics

pattern.

• When backspacing over proportionally spaced characters, Epson printers

move back the width of each proportional character; this emulation moves

back based on the current cpi setting, as if proportional spacing is

disabled.