Red Viper v1.2.1 is released. A Virtual Boy emulator for the Nintendo 3DS continuing mrdanielps's work on r3Ddragon, which is itself based on Reality Boy / Red Dragon. It uses a dynamic recompiler with busywait detection and a hardware-accelerated renderer to achieve high performance on the 3DS's limited hardware.

Red Viper Changelog:
This is a minor bugfix and optimization release.
Added some HLE for slow code in Virtual League Baseball 2 - multiplayer should now run at full speed on old 3DS
Fixed an issue where after toggling anaglyph mode, the home menu would run slowly

Download: Red Viper v1.2.1
Source:Here