Arm10 is the chip that handles the internal calculations of the 3DS. It's basically the brain of the system. Earlier today, I was playing Smash 4, and my opponent was at 996%. However, Smash does not show the decimal percent your opponent is at, so it builds up and the console goes along. However, the game was not normally meant for a stock to survive over 900%. Fox's laser does 1.2%. Eventually my opponent reached the exploitable percent, where the shown percent is 998% but in reality is actually 998.8%. Smash usually doesn't go above 999% but this trick causes the arm10 processor to halt and seek instruction from the game, as you achieve 1000% without the game knowing. Since Fox's laser does exactly 1.2%. This exploit can be used to write executable code where the game freezes, potentially loading a homebrew launcher Arm10 userland is more or less the same arm10 kernel, so we could easily gain access to other CPUs' kernel modes. This means illegit CIA installing on any firmware Smash runs on. Sorry 4.5 fanboys. What do you think this exploit could potentially be used for? The arm10 processor is used very early, around the same time arm9 is initialized. Along with Arm9Loaderhax, a great combo could see potential.