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Chapter 3: Migrating to a new printer8
A776 (B780) Programming Guide A776-PG00001 C 12/09
Moving from the A756 to the A776 (Thermal printhead dierences)
The following table details the list of commands whose behavior diers between the A756 printer and the A758, A760,
and A776 printers. This is due to the physical dierences of the 6 dots/mm head in the A756 and the 8 dots/mm head
in the A758, A760 and A776.
Command Description Dierence between the A756
and the A776.
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 A756. In text mode, the equivalent character
position is calculated.
1B 26 s c1 c2 n1 d1...nn dn Dene user-dened character set Since the dots on the A776 printhead are smaller, user
dened characters that were used on the A756 printers
will appear smaller on the A776 printer.
1B 2A m n1 n2 d1...dn Select bit image mode In A756 emulation mode, graphics are scaled to best
match the size of the graphic in the A756 printer.
1B 33 n Set line spacing This command uses n in terms of n/360 inches. Since the
A756 had a fundamental step of 1/152 inch and the A776
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 This command uses n in terms of n/360 inches. Since the
A756 had a fundamental step of 1/152 inch and the A776
has a fundamental step of 1/203 inch, the actual line
spacing will not exactly match the requested spacing.
1B 59 n1 n2 d1...dn Select double-density graphics In A756 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 A756 emulation mode, this command
calculates how many character positions to move
based on the A756 character width in dots (10)
versus the A776 (13).
1B 61 n Select justication This command does true dot resolution alignment for
centering versus character-aligned centering.
1D 2A n1 n2 d1...dn Dene downloaded bit image In A756 emulation mode, this command scales the
incoming data to provide a best match to the size of
the image as it printed on A756.
1D 2F m Print downloaded bit image In A756 emulation mode, this command scales the
incoming data to provide a best match to the size of
the image as it printed on A756.