Hello,

It seems to be a bug with nvram.
MessExtra works well at level 40/120 and no nvram file.
(version MessExtra : 46603 Ko, 27/09/25, 6dfe5d58f72e9f25534d9f610401def8938bd4379ce28b9c06 4002d4fa06fd15)
The nvram is exactly the RAM from 0 to 0x1fff when quitting MessExtra.
However, when I restart Mephisto Academy T+T/eng, the game and clock settings are reset (ie nvram doesn't work, problem on reading nvram ?).

Cordialy.

PS : after a good night, I read academy.cpp file :
- nvram is ... all the RAM (8KB battery-backed RAM(TC5564APL-15))
- in void academy_state::academy(machine_config &config), we have : NVRAM(config, "nvram", nvram_device"::"DEFAULT_ALL_0) , so all the RAM is reset.
- Is it possible that the RAM structure is different between academy and academytt ?