EFP9800 ESC/POS Commands

Flash Memory Commands

These commands copy user-defined character sets or logos to the printer’s flash memory. Depending on the command chosen, the object stored in flash memory is then copied to RAM when the printer is powered up, or kept in flash memory for later use. Either way, it is available from the flash memory whenever needed.

These commands are only available for the EFP9800 ESC POS emulation.

Copy Downloaded Object to Flash Memory

Copies the current downloaded object to flash memory. The object can either be a user-defined logo as defined by the Define Downloaded Bit Image command (1D 2A), or a user-defined character set as defined by the Define User-Defined Characters command (1B 26).

When the printer is powered up, or reset with the Initialize Printer command (1B 40), the object is restored to RAM from the flash memory. This function of the command is the same as the Copy the Object from Flash Memory to External Ram command (1B 7D 03), described later in this section.

Anything previously copied to flash memory is lost. If no object has been downloaded, nothing is copied to flash memory or enabled.

After the application sends 1B 7D 00, it must wait for the printer to return hexadecimal 0D before sending any more data. Any data sent by the application before it receives this response will likely be lost. If the application is unable to receive a response from the printer, it must wait for five seconds after sending 1B 7D 00 before sending any more data.

Hexadecimal

Decimal

ASCII

1B 7D 00

27 125 0

ESC } NUL

When user-defined characters (not logos) are copied to flash memory, the following occurs:

If no user-defined characters have been downloaded to the printer with the Define User-Defined Characters command (1B 26), nothing is copied to flash memory.

6– 76

3255 4073– 002

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Unisys EFP9800 manual Flash Memory Commands, Copy Downloaded Object to Flash Memory