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The Official DR DOS Website

DR DOS® is a fast, MS-DOS–compatible operating system for x86 PCs. Use it to run classic DOS software, write and debug low-level code, or boot a lean, dependable DOS on real and virtual hardware.

DR DOS dates back to 1988, when Digital Research shipped it as the sharper, more capable alternative to MS-DOS. Version 9.0 is a modern, all-new build, ready to run on everything from vintage PCs to today's virtual machines.

Latest Release: DR DOS 9.0 Revision 1393
Released November 11, 2026

Download DR DOS 9.0

What's Included

DR DOS 9.0 comes with a comprehensive set of commands and utilities:

Core File Management: CD, COPY, DEL, DIR, MD, MOVE, REN, TYPE, and more
EDIT Text Editor: Full-featured editor with colored display, menus, keyboard shortcuts, and clipboard support
System Utilities: MEM (memory information), VER (version), DATE, CLS, MORE
Advanced Tools: HEXDUMP for debugging, MOUSE driver support, REBOOT utility
Disk Tools: FDISK for partitioning and FORMAT for creating FAT12/FAT16 filesystems
Low-Level Access: PEEK, POKE, and JMP commands for direct memory manipulation and code execution

For Hackers: Very little modern software lets you touch the metal like this. Direct memory access makes DR DOS a hands-on platform for learning how operating systems really work, testing low-level code, and writing DOS software from the ground up.

Who Is This For?

DR DOS 9.0 is built for:

Retrocomputing enthusiasts keeping vintage PCs and classic software alive
Gamers running classic DOS games on real or emulated hardware
Developers working close to the metal in assembly and C
Students and educators exploring how operating systems actually work

Running DOS in production? The free download is a non-commercial beta. For commercial, embedded, and industrial deployments, with custom builds and vendor-backed support, see our commercial DR DOS solutions.