LINK

valuable information about the CMF format which i tried to reverse-engineer back in the "Recreative Game Maker" era, due to the lack of proper edition tool. My guess is that such tool did not exists except in the form of "take that MIdI file, and use this SBI (sound blaster instrument) for that midi instrument, etc. Perhaps they even simply had an OPL2 midi synthetizer so that they could plug a midi keyboard on it and be happy.