i got metal gear1 working,what you have to do is in the configuration menu set the machine type to "msx2+" and your good to go,i also tried this setting with metal gear2 and it worked just fine.these were both the cartridge versions of the game. the different versions of the game out there like disc and cartridge,this is the file names of the roms i used. metalgear1(1987)(konami)(j).msx2 metalgear2-solidsnake(1990)(ko.msx2)