A794 Owner’s GuideChapter 6: Programming Information

Comparisons

The following table details the list of commands whose behavior differs from the A793(A756) and the A794(A758) because of the physical differences of a 6 dots/mm head (A793/A756) versus an 8 dots/mm head (A794/A758).

 

Command

Description

Difference between previous product and new product

 

 

 

emulation mode.

 

 

 

15 n

Feed n Dot Rows

This command will move the paper on the receipt

 

 

 

in n/203 inch steps instead of n/152 inch steps.

16 n

Add n Extra Dot Rows

The dot rows will be measured in n/203 inches

 

 

 

versus n/152 inches.

1B

20 n

Set Right-Side Character

This command sets the right side spacing to “n”

 

 

Spacing

horizontal motion units. By default, these units

 

 

 

are in terms of 1/203 inches versus 1/152 inches.

1B

24 n1 n2

Set Absolute Starting

For graphics commands, the position is scaled to

 

 

Position

best match the previous product. In text mode, the

 

 

 

equivalent character position is calculated.

1B

26 s c1 c2 n1 d1...nn dn]

Define User-Defined

Since the dots on the new printhead are smaller,

 

 

Character Set

user defined characters that were used on the

 

 

 

previous printers will appear smaller on the new

 

 

 

printer.

1B

2A m n1 n2 d1...dn

Select Bit Image Mode

In emulation mode, graphics are scaled to best

 

 

 

match the size of the graphic in the previous

 

 

 

printer.

1B

33 n

Set Line Spacing

This command uses n in terms of n/360 inches.

 

 

 

Since the previous product had a fundamental

 

 

 

step of 1/180 inch and the new product has a

 

 

 

fundamental step of 1/203 inch, the actual line

 

 

 

spacing will not exactly match the requested

 

 

 

spacing.

1B

4A n

Print and Feed Paper

(Same as above)

1B

59 n1 n2 d1...dn

Select Double-Density

In emulation mode, the printer scales the graphics

 

 

Graphics

to provide the best match.

1B

5C n1 n2

Set Relative Print Position

The parameter to this command is in units of dots.

 

 

 

However, the command moves and aligns to

 

 

 

character positions. In emulation mode, this

 

 

 

command calculates how many character

 

 

 

positions to move based on the previous product’s

 

 

 

character width in dots (10) versus the current

 

 

 

product (13).

1B

61 n

Select Justification

This command does true dot resolution alignment

 

 

 

for centering versus character-aligned centering.

1D 2A n1 n2 d1...dn]

Define Downloaded Bit

IN emulation mode, this command scales the

 

 

Image

incoming data to provide a best match to the size

 

 

 

of the image as it printed on the previous product.

1D 2F m

Print Downloaded Bit

(Same as above)

 

 

Image

 

March 1999

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Epson A794-D100 manual Comparisons, 1D 2A n1 n2 d1...dn