Sega Dreamcast is a beautiful-looking game console, the last game console of Sega, and the game console that introduced online games to a generation. This project, Dreamcast One, see poster Temujin 123 for details Computerbase Forum, Put the cutting tool on that beautiful casing and drill it to install the mini game PC inside. This is an excellent work.
In the Dreamcast 7.48 inches × 7.71 inches × 2.97 inches (190 mm × 195.8 mm × 75.5 mm) chassis, Temujin 123 successfully installed AMD Ryzen 5 Pro 4650G, 16GB DDR4-3200 and three SSD Dereme You. Considering the limited space, it is wise to choose AMD 4650G APU instead of a separate GPU for the PC, but Temujin 123 has been successfully installed in the DVD-RAM drive of old laptops. The cooling comes from Noctua NH-L9a-AM4, there is a Wi-Fi 5 card instead of a 33K modem, and the four controller ports now support USB upgrades.
Dreamcast is already a mini gaming PC running Hitachi SH-4 32-bit RISC processor, 26MB of various RAM types and PowerVR2 GPU. It pioneered the use of off-the-shelf components to build a console. Its Windows CE operating system (with DirectX API to make porting PC games easy) and built-in modem made it very much like a PC at the time, as were keyboard and mouse peripherals.
Check out the forum posts to see how he did it, as well as a lot of pictures.