M1.XML 20100408 is released.M1.XML file for use with M1 - keeping up with changes in MAME.M1 plays the music from arcade games by running the code in the original ROMs (not supplied). This allows entirely authentic playback of classic video game tunes while you work.

M1.XML 20100408 Changelog:
Added:
Crisis Zone (crszone) to the Namco System 12 driver.
Downhill Bikers (downhill) to the Namco System 12 driver.
Ridge Racer Full Scale (rrf) to the Namco System 22 driver.

Fixed
aircombj -> aircomb (Air Combat) to match parent changes in MAME.

Data synced to MAME 0.137u2.

Download: M1.XML 20100408
Source:Here