A big update this week! We have some significant progress on Sega Model 2 emulation from Ernesto Corvi (with thanks to El Semi), major Namco System 21 improvements from Phil Stroffolino, and several new shooting games on Seta hardware from Luca Elia. On top of that, quite a large number of Mahjong games and clones of existing games have shown up in the last week. Plus the usual collection of internal fixes and improvements, including a preliminary 64-bit recompiler for the MIPS3 CPUs. Have fun!