CognitiveTPG A798 - Manual (Page 97)

Chapter 4: Programming Commands 97 Revision C 12/09
A798-PG00001C
Select memory type (SRAM/flash) where to save logos or user-defined fonts
ASCII GS “ n
Hexadecimal 1D 22 n
Decimal 29 34 n
Value of n: 48 – 53
n = 48 (ASCII n = 0) HEX 30
Loads active logo to RAM only. This is used to print a special logo but not have it take up flash memory. A logo defined
following this command is not preserved over a power cycle. The printer disables interrupts while writing to flash. Any
command that cause data to be written to flash should be followed by a 50 Msec delay to allow significant time for the
write operation.
n = 49 (ASCII n = 1) HEX 31
Loads active logo to flash memory. This is the default condition for logo flash storage. A logo defined following this
command is stored in flash memory.
n = 50 (ASCII n = 2) HEX 32
Loads user-defined characters to RAM only. This is the default condition for user-defined character storage. Any user-
defined characters defined following this command are not preserved over a power cycle.
n = 51 (ASCII n = 3) HEX 33
Loads user-defined characters to flash memory. An application must use this command to store user-defined characters in
flash memory. Any user-defined characters defined following this command are stored in flash memory. A user-defined
character cannot be redefined in flash memory. The flash memory page must be erased by an application before redefining
user-defined characters. For more information, see the erase user flash sector (1D 40 n) command.
Specifies whether to load the logos or user-defined characters to flash memory or to RAM (volatile memory). The selection
remains in effect until it is changed via this command or until the power cycles. To specify permanent font flash are, also
send 1D22 81 01.
Related information
This command is recognized in A798 native mode. In A793 and LEGACY emulations, parameter bytes go into the print
buffer.
Flash memory user sectors allocation
ASCII GS “ U n1 n
Hexadecimal 1D 22 55 n1 n2
Decimal 29 34 85 n1 n2
Default Value of n1: 1 (see below)
Default Value of n2: 1 (see below)
n1 is the number of 64k sectors used for logos and user-defined characters.
n2 is the number of 64k sectors used for user data storage.
n1 + n2 <= 6 (dec) (1M)
n1 + n2 <= 22 (dec) 16 (hex) (2M)
If n1 + n2 is greater than the maximum number of sectors available, the command is ignored. The printer returns NACK.
Issuing this command with parameters different from current parameters will erase all sectors. The printer returns ACK.
Issuing this command with parameters the same as current parameters will do nothing. The printer returns ACK.
Note: Flash memory is made up of user and program code. Therefore, the available flash memory space will vary with the
amount of program code utilized.