After 4 years, ARMX is changing its call sign. EMUX now features both ARM and MIPS device emulation, in a unified framework! Join us as we unveil EMUX and take you into the inner workings of emulating both ARM and MIPS IoT devices. We will be releasing a new Docker image featuring a MIPS CTF challenge to test your MIPS exploit development skills. Slides from my workshop at Ringzer0's December 2021 Workshop Advent Calendar.