I love the games Double Dragon 1 and Double Dragon 2, but I can't stand the slowdowns. I see two solutions for the slowdowns, which I tried to research with no result.
1. Slider controls
Here you can overclock the cpus. The values aren't saved though

. Do I have to enable an option, or is there a diff file ?
2. Create a cheat
I guess this should also be possible. My problem is that I have the option to enable or disable cheats, but not to create one. Isn't that part of the official releases ? Do I need another build ?
I'm currently using MAME 0.141. I do know how to compile my own version and add diffs to the source. Any help is appreciated.