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Welcome to FreeDOS

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FreeDOS 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 FreeDOS.
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You can play your favorite DOS games on FreeDOS. 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!
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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 FreeDOS, and you'll be good to go!
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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 FreeDOS can fit in very well.

FreeDOS is open source software! It doesn’t cost anything to download and use FreeDOS. You can also share FreeDOS for others to enjoy! And you can view and edit our source code, because all FreeDOS programs are distributed under the GNU General Public License or a similar open source software license.

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Latest Updates

Doszip Commander 2.65

The Doszip Commander is an LFN-aware TUI file manager (similar to Norton Commander) with built-in Zip and UnZip. The latest release fixes two bugs: + fixed home directory + fixed empty disk error. The second bug was if you have a formatted floppy disk that does not have a label and contains no files, Doszip could not read the floppy. Both bugs are now fixed in version 2.65. You can find it at Doszip on GitHub. We've also mirrored the new release on the FreeDOS Files Archive at Ibiblio, under /util/file/doszip-commander

Happy 29th anniversary to FreeDOS!

In 1994, several of us got together around a pretty neat idea. We liked DOS, but Microsoft was clearly moving completely to Windows. "The next version of Windows," they said, "would do away with DOS." We wanted to keep DOS around, so we decided to write our own. That project, announced 29 years ago TODAY on June 29 1994, was the FreeDOS Project. Thanks to everyone who is (or has been) part of FreeDOS! 29 years is a long time for any open source project, and I'm looking forward to more years to come.

I can't recognize everyone in one post, but it's because of people like Jerome, Ralf, Tom, Gregory, Eric, Tk Chia, Steffan, Bart, Pat, Aitor, Bernd, Wilhelm, Mercury, Michael, Paul, Liam, Bret, Rugxulo, .. and loads of other people who made FreeDOS what it is, and keep FreeDOS going. Thank you to everyone who finds and reports bugs, updates documentation, translates to other languages, fixes issues, adds new features, and writes new programs!

To celebrate our anniversary, I wanted to show that anyone can contribute to FreeDOS. It's not that hard to rewrite many the core DOS utilities, and you don't have to be an expert programmer to write your own versions of the basic tools. Check out this programming video {YouTube} to see a simple way that anyone can write their own programs that replace the standard DOS commands.

EtherDFS ver 0.8.3

EtherDFS is an 'installable filesystem' TSR for DOS. It maps a drive from a remote computer (typically Linux-based) to a local drive letter, using raw ethernet frames to communicate. Mateusz Viste published a new version of EtherDFS today: version 0.8.3 fixes a bug kindly reported by Jerome Shidel. You can download the new version from the EtherDFS website on SourceForge. We've also mirrored this release on the FreeDOS Files Archive at Ibiblio, under /net/etherdfs

libm-0.5 math library

Gregory Pietsch has released version 0.5 of his libm library. lbim is a public domain math library that provides solid support for math functions. This should be C99 and POSIX compliant. Gregory says about this release: "This is the latest version. I believe I have all the functions in libm implemented here" and asks that you please download and test. You can find it in the FreeDOS Files Archive at Ibiblio, under /devel/libs/libm

New V8 Power Tools for FreeDOS

The latest version of V8Power Tools for DOS is now available. This includes the new VTEST beta for general testing. VTEST is a powerful and flexible command line tool to perform all kinds of tests in batch files, including comparing strings, files, and numbers. You can find more information at V8 Power Tools or download from V8 downloads. Thanks to Jerome Shidel for his great work on V8 Power Tools!

Next FreeDOS virtual get-together

We had a lot of folks on today's virtual get-together! I love seeing people "in person." Save the date for the next FreeDOS virtual get-together. The next virtual meet-up will be on Sunday, July 23 at 11am US/Central. We alternate topics every month, and July's focus will be "technical." This is a great time to do live debugging or discuss programming topics, and bring those ideas back to the freedos-devel email list for further discussion.

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