Technology

‘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

Source

Tom's Hardware

Published

Mar 15, 2026

TL;DR

AI Generated

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.

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Jensen Huang snubbed by White House for President Trump’s China state visit — Nvidia CEO not on roster, which includes Apple's Tim Cook and Elon Musk

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Dell SupportAssist update is crashing PCs with constant blue screens and reboot loops — the boot service built for system recovery is the culprit of unending instability

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‘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

TL;DR

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Jensen Huang snubbed by White House for President Trump’s China state visit — Nvidia CEO not on roster, which includes Apple's Tim Cook and Elon Musk

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‘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

TL;DR

Similar Articles

Jensen Huang snubbed by White House for President Trump’s China state visit — Nvidia CEO not on roster, which includes Apple's Tim Cook and Elon Musk

Amazon employees admit to using AI unnecessarily to pump up internal usage scores — workers complain of intense pressure to use AI tools

Compromised Mistral AI and TanStack packages may have exposed GitHub, cloud and CI/CD credentials in 'mini Shai Hulud' malware infection — supply-chain campaign spreads across npm and AI developer ecosystems like wildfire

Dell SupportAssist update is crashing PCs with constant blue screens and reboot loops — the boot service built for system recovery is the culprit of unending instability