MiSTer FPGA Forum

I couldn't get the diagonals to work but I assigned 2,4,6,8 to U,L,R,D on the right stick through the core's "Define Intellivision Buttons" process. Works great with Night Stalker as that game only fires in 4 directions. You can press Menu each time you want to skip unneeded buttons/numbers like 5,7,9 and assign the others to preference.