The Mednafen team have released a new version – 0.9.47.
Official Website: https://mednafen.github.io/
-- 0.9.47: -- August 25, 2017: Lynx, MD, NGP, SMS: Added a few missing variables to save states. August 24, 2017: SS: Added save state support. Revamped save state helper macros and functions, to allow save-stating of variables in arrays of structs to be simpler. August 22, 2017: SS: Fixed BCR1 write protect, and added stub emulation of the other BSC registers. SS: Added incomplete stub Action Replay 4M Plus emulation(for experimentation); proper Action Replay support would require SH-2 UBC emulation, and that may be too costly performance wise. August 21, 2017: SS: Implemented very rough approximation of bus timing side effects when master SH-2 DMA is active(accurate handling of bus priorities and sharing would increase CPU requirements noticeably, but it may ultimately be necessary as a database-driven option for some stubborn games in the future). Fixes startup hangs in "Device Reign", "Real Sound", "Resident Evil", "SD Gundam G Century S", "Super Tempo", "Tennis Arena", "Tilk", "Yuukyuu Gensoukyoku", "Yuukyuu Gensoukyoku 2nd Album", "Yuukyuu Gensoukyoku ensemble", "Yuukyuu Gensoukyoku ensemble 2", "Yuukyuu no Kobako Official Collection", and "Zero4 Champ".