M1.XML 20110326 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 20110326 Changelog:
3/26/2011 - 1910 Sets
Changed:
batrid -> batrider
bkraidu -> bbakraid

New parent sets in 0.141u4:
shippumd -> kingdmgp
mahoudai -> sstriker

Data sync to 0.141u4

Download: M1.XML 20110326
Source: Here