Hi, little post to say that now, here is a Coleco emulator for Dingoo. You don't need Linux to use it, it's a native Dingoo SIM file.
Put ColecOO.SIM in your GAME directory. Put your .COL games where you want.
Use "Interesting game" from Dingoo menu and choose your .COL file, the emu will launch with the game
Again, i used s2d sdk to make this emulator because i can't do some nice sound without it.
You can see my webpage about it here : ColeCOO For Dingoo. Also, the website is in French
Dowload here : ColeCOO