[PSIG]

Here is some info how vems that runs atmega does it:
https://vems.hu/vt/help/v3/v3_config_switch.html

Yes, that is config-switching, equivalent to tune-swapping, and not the generic term of table (only)-switching. Big difference, and exactly what I am talking about. For this reason, please do not use "table-switching" when you mean config-switching or tune-swapping. Now let's return to the OP's thread, and if you wish to discuss or comment further, please start your own thread or add to a thread already on that specific topic. Thanks!

David