‘Clean-room reimplementation’ of DR-DOS hits early beta, modernizing the operating system 38 years after its debut — runs Doom, Warcraft, SimCity, and other period-appropriate titles

DR DOS version 9.0, a "clean-room reimplementation," is now in early beta testing, offering a modernized version of the operating system originally developed by Gary Kildall 38 years ago. The project aims to provide a legally unencumbered DOS experience for retrocomputing enthusiasts. The OS, now owned by Whitehorn Ltd. Co., has been rebuilt from scratch and supports classic games like Doom, Warcraft, and SimCity. Future updates will include enhancements like FAT32 filesystem support and additional drive letter support. Users are cautioned about potential rough edges and advised to test the OS on spare devices or in a virtual machine environment.