The Chunithm slider has sixteen cells and fifteen (I think?)
vertical lines splitting the cells. Diva does not have these lines,
so presumably the LED data format is different. Need to analyze
this further.
SEGA games are unplayable between 03:00 and 07:00 local time due
to a network maintenance period that is hard-coded into the games
themselves (no, guest play is not available).
Deal with this by slowing down time to avoid 02:00 (the time when
a warning appears and new credits eventually start being rejected),
then jump forward to sync up with real time when 07:00 hits.