NES Core: SuperMarioBros running too fast?

[sblendorio]

I compared the speed of gameplay with videos on youtube: is it just my impression or does the MiST NES Core run "too fast"?

[harbaum]

You need to make sure the video system matches as some games adopt their speed via the video timing. E.g. running the pal (50 hz) version of mario on a ntsc system (60 hz) will make the entire game run 20% too fast. Maybe that's your problem?

[sblendorio]

I'm using an image called SuperMarioBrosEurope. How do I change PAL/NTSC system?

[sblendorio]

Trying "World" or "USA" version the speed comes normal. Is there a way to use "Europe" titles with normal speed?

Thanks for your answer!