nixOS DOOM CHIP-8 OS\6 QNX SDP 7.1 OS\5 dog Super Dimension Fortress 8086emu OS\4 OS\3 OS\2 OS\1 8086 CompilerFun.DD 2 KVM QNX SDP 8.0 Snake in 1K talking to the system in scratch CompilerFun.DD dawnos/SUBLEQ domt gamble discord ai agent