Freedos – Dosbox Download is an open source DOS-compatible operating system that you can use to play classic DOS games, run legacy business software, or develop embedded systems. Any program that works on MS-DOS should also run on

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You can play your favorite DOS games on And there are a lot of great classic games to play: Wolfenstein 3D, Doom, Commander Keen, Rise of the Triad, Jill of the Jungle, Duke Nukem, and many others!


Need to recover data from an old business program? Or maybe you need to run a report from your old finance system? Just install your legacy software under, and you’ll be good to go!


Many embedded systems run on DOS, although modern systems may instead run on Linux. If you support an older embedded system, you might be running DOS. And can fit in very well. is open source software! It doesn’t cost anything to download and use You can also share for others to enjoy! And you can view and edit our source code, because all programs are distributed under the GNU General Public License or a similar open source software license.

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What’s New

lDebug is a 86-DOS debugger similar to the MS-DOS Debug tool. lDebug is based on DEBUG/X 1.13 to 1.18 as released by Japheth, which was based on Paul Vojta original DEBUG. C. Masloch has updated lDebug release 1 as a package. We announced lDebug a month ago, but there are a few features to note about this version, including: + Arbitrary unsigned 32-bit expression evaluator + Bootloaded mode and its BOOT commands + Script file reading + /C command line option to pass commands to the debugger on startup + Extended online help + License changed to the open source Fair License (having asked Paul Vojta and received his confirmation). You can find the source at ecm”s webbed site with the package – we”ve also mirrored this at the files archive at Ibiblio under /dos/debug/ldebug

If you run on physical hardware, you might be interested in this ongoing experiment from Japheth: DOS32pae is a program that is supposed to be added (by a linker) to a 32-bit PE binary. This supports extra memory using PAE paging. And as Japheth shared recently: “there”s now even a real application: HDAPLAYX. This is a .wav player with the following features: – accesses the Intel HDA controller directly – loads the samples in extended memory beyond 4 GB (needs HimemSX) – NO “user interface” .. just starts to play, then launches a shell. The last “feature” is cool, because this allows to run another application during playing. So it”s possible to run DOOM and let the player emit some music in the background. Restriction: the HDA controller must support 64-bit physical addresses – and the machine must have more than 4 GB!” It”s all still a bit experimental, and definitely for adventurers only. If you run in a virtual machine, DOS32pae is probably NOT for you. You can find the source code on GitHub or download the latest release directly: dos32pae_v1b.ZIP (zip file)

Fritz has updated the Help documentation. Major updates in this version include some minor fixes, and added French and Spanish languages (thanks to Lorenzo del Toro for Spanish translation and to Berki Yenigün for French language). Note that this release includes both HtmlHelp content and AMB content. AMB is the open “Ancient Machine Book” ebook format, also for I”ve mirrored this 1.0.8a release on the files archive at Ibiblio, under /dos/help/1.08. This is called “internet version” because this version is not (yet) completely supported by help.exe.

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You may have seen recently that Richard Stallman recently rejoined the Free Software Foundation on the Board of Directors. By appointing Stallman to the Board of Directors, the FSF reaffirms that they think Stallman”s behavior is okay. I”m not okay with that. I join others in calling on the FSF to hold Stallman accountable for his behavior, to remove him from any position of authority or leadership, and work to address the damage he has done to all open source communities. Until then, I will not associate with the FSF or GNU, and I will not participate in any events that include Stallman. Full statement is on my personal page.

Gregory Pietsch released an update to everyone”s favorite text editor, Edlin. This is a minor bugfix release. I think the changes will be visible if you compile this on Linux, the functionality on should remain the same. And yes, you really can compile Edlin for (I have). You can find Edlin on SourceForge. I”ve also mirrored this release on the files archive at Ibiblio, under /dos/edlin. Thanks Gregory!

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