General todo
From DeSmuME
probable todo for next release:
- fix fat generation (sdfatlib?) done ** but!! it needs to support LFN!
- fix 2038 problem
old todo for next release but likely deferred:
- UEP
- UEP nitrofs mode
- unify NDS_LoadRoms
- ui for slot-1
- unify slot1=nothing and eject handling
- bitdepth to 666