SATO CL412E Operator And Technical Reference Manual page 282

Appendix D: Optional Features
INTERNAL FLASH ROM MEMORY EXPANSION
Description
A factory installed option allows the internal FLASH ROM to be expanded from 2MB
to 6 MB by adding an additional 4MB. It can be used to store fonts, graphic images
and form overlays. The Expanded Memory is selected using the <ESC>CC Memory
Area Select command. This option requires the installation of an Expanded Memory
pcb and is a factory-only installed option.
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