[h]TGB Dual[/h] What is TGB Dual? TGB Dual is a GB/GBC emulator with support for the “EXT” serial port, most notably used for multiplayer games requiring the game link cable.
How to compile the library
git clone https://github.com/libretro/tgbdual-libretro.git
cd tgbdual-libretro
make
Screenshots
I used the “Sufami Turbo” game type in the libretro API for the dual-GB mode, because it seems it was the best fit for loading and saving two games’ SRAM with RetroArch. Unfortunately, that means the RTC isn’t saved in dual-GB mode.
Netplay has some issues I have yet to work out.