Download DR DOS 9.0

Current Release: DR DOS® 9.0 Revision 265 (Released February 28, 2026)

BETA SOFTWARE: DR DOS 9.0 is in active development. This software may cause data loss. Back up your data and avoid using on production systems.

Download Links

Release Build (Recommended for most users)
Debug Build

By downloading, you agree to our license terms: non-commercial use only, provided without warranty. See full license for details.

Debug builds are larger, slower, and output detailed debugging logs to COM1 (making that port unavailable for other uses). Only download the debug build if you're experiencing issues and need to provide diagnostic information for bug reports.

Quick Installation Guide

Getting started with DR DOS is straightforward:

Download the boot16.img.7z file from the links above
Extract the 7z archive to get the boot16.img disk image
Write the image to a USB drive or CompactFlash card using dd or similar disk imaging tool
Boot your computer or virtual machine from the media
DR DOS will start automatically - no installation required!

For detailed installation instructions, virtual machine setup, and troubleshooting, please see our comprehensive software manual.

System Requirements

DR DOS 9.0 runs on a wide variety of x86 hardware, both real and virtual:

Processor: Intel 386 compatible or higher
Memory: 2 MB RAM minimum
Display: VGA-compatible display adapter
Storage: FAT16 hard disk partition
BIOS: LBA or CHS disk addressing capability

DR DOS 9.0 works on both real vintage hardware and modern virtual machines including QEMU, VirtualBox, VMware, and others.

Previous Releases

Previous beta builds are available in our releases archive. Check our release notes to see what's been added in each revision.