hi
Im confused ...
I used to play SNOW BROS game with 60hz and with old mame version

now I downloaded a mame pack with newer version of mame , but when I read game info within startup screen ,
writes 57 hz... so it making some synch issues

My question is how mame determinates games Screen and Refresh rates ,
*it reads from rom files or just from gamelist.xml file inside of mame directory?
if so , can I change values in gamelist.xml for correcting values

thanx