Greetings,
I have the rom set .120 and am pretty happy with it.  However, I am creating a couple bartops on older computers.  500-700mhz range.  I would like to use the .60 version of Mame.  So I am wondering where I could find a rollback dat for use in clrmamepro?
I'm am willing to rollback the roms and use the version of mame from anywhere from .55-.60.  I've heard these versions like my speed of processors.