Discover how open source and open hardware have revolutionized the retro computing community in this 46-minute conference talk from linux.conf.au 2022. Delve into projects replacing scarce CPUs, explore firmware that has spawned numerous 8-bit homebrew computers, and witness the resurrection of a 1970s operating system. Learn about the exciting fusion of old and new technologies that create nostalgic yet innovative computing experiences. Examine the impact of Raspberry Pi, explore projects like Omega 500 and AmigaPi, and understand the performance implications of these developments. Gain insights into the thriving retro homebrew community, the significance of Z80 CPUs, and the revival of CP/M. Featuring demonstrations and discussions on various hardware components, this talk offers a comprehensive look at the intersection of modern open-source principles and classic computing.