> > Otherwise, some easter eggs won't be usable! > > Most games I've played on with an RTC still let you set the time but MAME uses your > PC's time for the RTC simulation
They should only use the PC time at startup, if you then change it they'll carry on counting from where you set it. If you replay an INP then it sets the date and time to when the INP was recorded, so that when it gets played back it will have the same behaviour.
No matter where the time comes from, if the game only runs at 50% of speed then the time will count at 50% of real time. i.e. it only ever reads the time from your pc once (some people have implemented rtc's differently but they eventually get changed to work properly).
A command line option for setting the RTC date/time instead of using the PC clock is something that could be easily added, if someone cared enough.
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