Mednafen v1.23.0-UNSTABLE is released. Mednafen is a multi-game-system emulator, for various platforms, including emulation of the following systems:Atari Lynx,Famicom,GameBoy (Color),GameBoy Advance,Neo Geo Pocket (Color), NES(both NTSC and PAL),PC Engine/TurboGrafx 16 (CD) and SuperGrafx,PC-FX,WonderSwan (Color).

Mednafen v1.23.0-UNSTABLE Changelog:
Expanded and harmonized the accepted value ranges for settings "sfspeed" and "ffspeed" to 0.25 through 15, for greater versatility.
Apple2: Added support for an RGB-style video mode, selectable with the new setting "apple2.video.mode".
Apple2: Added support for custom 16-color palettes(using one will automatically enable RGB mode).
NGP: Fixed broken voice playback in "Densetsu no Ogre Battle Gaiden".
NGP: Fixed eventual save-related hang in "The Last Blade".
PCE: Fixed compatibility issues with some Super CD-ROM² games when using a US system card image.
SNES-Faust: Made various changes to try to improve game compatibility.
SNES-Faust: Added CX4, SA-1, and SuperFX emulation.
SNES-Faust: Added setting "snes_faust.h_filter" to control handling(e.g. blending) of lores and hires video modes.
SS: Fixed hang at end of disc 1 of "Grandia", with horrible per-game hack.
SS: Fixed hang in "Fighters Megamix" that occurred after the intro FMV played(or was interrupted), with horrible per-game hack.
SS: Fixed flickering text in "Arcade's Greatest Hits".
SS: Fixed major graphical glitches during gameplay in "Whizz".
SS: Fixed much of the graphical glitching in "All-Star Baseball 97".
SS: Fixed many instances of rescue text flickering in "Burning Rangers".
SS: Fixed battle text truncation in "Albert Odyssey".
SS: Fixed flickering at the start of disc 2 of "Policenauts".
SS: Fixed hang/crash in "Space Jam".
SS: Fixed major game logic errors during battles in "Dragon Force II".
SS: Fixed early hangs in "Die Hard Trilogy", "GeGeGe no Kitarou", "Nobunaga no Yabou Shouseiroku", and "Formula Grand Prix - Team Unei Simulation".
SS: Fixed FMV glitches in "Gex" and "Slam 'n Jam 96".
SS: Fixed various graphical glitches in "Shunsai".
SS: Fixed graphical glitches on the character select screen in "Virtual Mahjong".
SS: Fixed missing title screen, main menu, and gameplay background graphics in "Ronde".
SS: Fixed explosion graphic glitches in "Thunder Force III" in "Thunder Force Gold Pack 1".
SS: Fixed hang that sometimes occurred after pausing in "Thunder Force AC" in "Thunder Force Gold Pack 2".
SS: Fixed FMV flickering in "Lunar".
SS: Fixed major graphical glitches in the later stages of "Shienryu" when on arcade mode.

Download: Mednafen v1.23.0-UNSTABLE x86
Download: Mednafen v1.23.0-UNSTABLE x64
Source: Here