Dreamcast on Atom D510 Nvidia Ion a tad slow

Hi all,

Dreamcast is running a tad slow on an old Atom D510 processor - I would say games are about 80 - 90% speed.

I like to change some of the settings for Reicast, how do I do so?

I found the emu.cfg, but each time I end it, the system seems to reset it back to default?

Which file should I modify to change reicast settings?

Thanks!