The was officially released on March 9, 2009 . It marked a period of intense development, including major improvements to Sega System 1/2 hardware emulation and the addition of many "PGM" (PolyGame Master) titles. Why the Version Number Matters
Understanding the MAME 0.130 ROMset: A Guide for Retro Gamers mame 0.130 romset
In the world of MAME, . The emulator is updated frequently, and as developers find better ways to dump arcade chips or discover missing data, the required files for a game change. The was officially released on March 9, 2009