Instruction manual

A758 Owner’s Guide Chapter 7: Programming Guide
September 1999 149
Select Double-Density Graphics
ASCII:
ESC Y
n
1
n
2
d
1 …
d
n or ESC L
n
1
n
2
d
1 ...
d
n
Hexadecimal:
1B 59
n
1
n
2
d
1 ...
d
n or 1B 4C
n
1
n
2
d
1
… d
n
Decimal:
27 89
n
1
n
2
d
1 ...
d
n or 27 76
n
1
n
2
d
1 ...
d
n
Value of
n
:
Value of
n
(8-Dot
Single Density Mode)
Value of
n
(24-Dot Single
Density Mode) Value of
d
n
1 + (256 x
n
2) 3 x [
n
1 + (256 x
n
2)] Number of Bytes of Data
(Printed Down, Then Across)
Enters one line of 7 (slip in A756 mode) or 8-dot double-density graphics into the
print buffer. Any print command is required to print the line, after which the
printer returns to normal processing mode. The number of bytes sent is
represented by the formulas in the table.
Each bit corresponds to one horizontal dot. Compare to Set Bit Image Mode (1B
2A, m=1) earlier in this document.
Exception:
1B 4C
n
1
n
2
d
1
… d
n is only valid in A756 Emulation Mode.
Select the Current Logo (Downloaded Bit Image)
ASCII:
GS #
n
Hexadecimal:
1D 23
n
Decimal:
29 35
n
Range of
n
:
0 – 255
Selects a logo to be defined or printed. The active logo
n
remains in use until this
command is sent again with a different logo
n
.
When this command precedes a logo definition, that definition is stored in Flash
Memory as logo
n
. If there is already a different definition in Flash Memory for
logo
n
, the first is inactivated and the new definition is used. The inactive
definition is not erased from Flash and continues to take up space in Flash
Memory.
When this command precedes a logo print command and
n
is different from the
previously active logo selected, the printer retrieves the logo definition for
n
from
Flash Memory and prints it. If there is no definition for logo
n
, then no logo is
printed.
In the case of a previously existing application that expects only one possible
logo, the printer will not receive the Select Current Logo (1D 23
n
) command. In
this case, the printer assigns 0 as the active logo identifier. It automatically stores
any new logo definition in Flash Memory as logo 0, inactivating any previous
logo 0 definition. If the Flash Memory space available for logos fills up with
inactive logo 0 definitions, the firmware erases the old definitions at the next
power cycle. This is the only case in which the printer erases Flash Memory
without an application command.
In the case of a new application using multiple logos, the Select Current Logo (1D
23
n
) command is used. After that, the printer no longer automatically erases the
logo definition Flash Memory page when it fills with multiple definitions. A new
application using multiple logos, writing a user-defined character set into Flash