A couple years ago, I posted here asking for help to emulate a little system known as the Monon Color. Much to my surprise, David Haywood stepped up and said he would work on it. This led to what we currently have in mame as you can see here: https://github.com/mamedev/mame/blob/master/src/mame/drivers/monon_color.cpp
Unfortunately, he has not been able to continue working on it. Would anybody be willing to continue the progress made?