Epson A794-D100 - Manual (Page 51)

A794 Owner’s Guide Chapter 6: Programming Information
March 1999 45
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
Spacing This command sets the right side spacing to “n”
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
Position For graphics commands, the position is scaled to
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
Character Set Since the dots on the new printhead are smaller,
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
Graphics In emulation mode, the printer scales the 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
Image IN emulation mode, this command scales the
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
Image (Same as above)