Hi @tomrix,
According to the release notes of the MCAL drivers, only the S12ZVMC256 is supported.
As you said, the MCUs are very similar - most of the modules like SPI, SCI, MSCAN are the same.
But there are differences too, refer to the RM, Table 1-3. S12ZVM Module Version Table.
Also, in general, the MCAL drivers requires more Flash and SRAM.
There is only 8kB of SRAM and 128kB of Flash on S12ZVMC12.
The MCAL comes with a Quality package that has Memory size reports for each driver.
Regards,
Daniel