A new update to MAME 0.120 is now available on the Latest Release page. This update features an overhaul of the Mad Alien driver from Stefan Jokish, improved SCSI and I2C emulation from smf, a new 6850 ACIA implementation from Curt Coder, some progress on the Mortal Kombat 4 front, and some additional architecture-specific optimizations that are useful for 3D rasterization.

As always, report issues over at MAMETesters. And have fun!