This is original "black-and-white" GameBoy (DMG-01) emulator. It supports variety of mappers, boot from internal ROM and has nice-looking LCD effect. Compatibility is pretty high.
It is very portable with minimal code modifications and can be used for educational purposes.
Controls in Windows:
Arrows = Direction
A - SELECT
S - START
Z - B
X - A
Enter - press all buttons at once (to do game save or reset etc.)
Escape - exit emulator
F8 - Switch frame limiter on/off
F9 - Switch LCD effect on/off
F12 - Turn sound on/off (maybe buggy)
git clone https://github.com/emu-russia/dmgemu.git
cd dmgemu
mkdir build
cd build cmake .. make
./dmgemu zelda.gb