RetroCopy v0.666B is released.RetroCopy is an attempt to emulate the Sega Master System and Nintendo Entertainment System at the cycle level.It also includes a custom OpenGL powered 3D interface which shows things like the gameboxes. It is currently only available for Windows, with 32bit and 64bit versions available. RetroCopy is a new Master System emulator for Windows.

RetroCopy v0.666B Changelog:
-[EMU] Added accurate Sega Genesis / Megadrive emulation. It should be the most accurate Genesis emulator available as it is nearly completely cycle accurate. Features include crisp stereo sound emulation, gameplay rewind, Sega Virtua Processor (SVP used in Virtua Racing), EEPROM, SRAM, accurate interlace emulation (Sonic 2 - 2 player mode). Takes advantage of 64bit (x64) CPUs. More details here :- http://www.retrocopy.com/sega-genesis.aspx
-[EMU] Added cycle accurate stereo sound to gamegear. Used by Outrun, Aleste, Galaga, Woody Pop, Xmen etc
-[GUI] Mouse cursor now disappears after 3 seconds of inactivity so it's not obscuring gameplay
-[CORE] Added option that lets RetroCopy manage how CPU cores are used. Useful for some AMD systems running on Windows XP if they have timing problems
-[CORE] Fixed memory leak in game loading
-[SOUND] Changed the ingame "fullscreen" to Stereo sound. The 3D world still uses mono as the TV's don't have two separate virtual speakers for the sound to come from yet.
-[SOUND] Fixed bug which could cause glitches in the sound on some systems

Download: RetroCopy v0.666B
Source:Here