Regarding”Hando”, webmaster of GP32-Xtreme rlyeh ported a Colecovision-Emulator over to the GP32. It seems to work very fine. here are a few lines from Hando’s posting:

After sending a fMSX emulator for GBAX competition, Rlyeh has ported another emulator for GP32. This time his choice was ColecoVision emulator.In August 1982, Coleco released the ColecoVision. It was a new $175 videogame system with graphics and sound superior to both the Atari 2600 and the Intellivision. What really”made”the ColecoVision, however, was its pack-in game: the mega-popular Donkey Kong. In any event, Coleco’s console went on to become one of the most popular game machines among 1980s players, as well as among today’s classic gamers. (info from Classic Gaming Museum)Back to nowadays 🙂 There is no public release of this emu yet, but it is going to happend soon. Emulator works with fullspeed and frameskip=0 at 66MHX clock, has full sound support, load normal/zipped/gzipped roms. And of course there are plenty arcade classic games for this system, so it is worth of waiting. You can see more screens from emu (screenshots was taken by me on Geepee emulator so they have some glitches which do not exist on GP32) after clicking more.