I'd like to make a backup of calibration data before new calibration.
Is there a "MWRITE" command to restore data?
Any other recommendations?
There are several programs, using MREAD command, to read the complete 2kB nvSRAM.
There is no way to write back via MWRITE, as the CAL RAM is HW and SW protected.
PHK from the time-nuts claims to have an assembler program which can do, but he did not publish.
Therefore, the only way is to desolder the SRAM, and write the content with aid of a programmer, maybe to an SRAM with fresh battery.
Frank