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

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 45