Red Viper v1.3.1 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 release adds some compatibility fixes for Zero Racers and Red Alarm.
Note that on old 3DS, performance is currently dodgy for both of the newly released games, Zero Racers and Dragon Hopper. New 3DS works fine though. In any case, please show Nintendo some thanks by playing the games on Switch!
Fix wireframe layering in Zero Racers
Fix title screen animation tearing in Zero Racers
Fix wireframe layering on controller menu in Red Alarm
Hopefully minor performance improvements in Test Chamber

Download: Red Viper v1.3.1
Source:Here