Subzero just released a new version of the SMS / GG emulators with a screen bugfix for the a320.
over 80 percents of games can be run properly, that’all.
A = A
B = B
X = Start / Pause
^ = hard reset
Power = menu
Put the .sim files in the GAME root directory
Put some .sim or .gg games somewhere and launch them from your dingoo.