Microsoft has released the MS-DOS 4.00 source code, binaries, disk images, and documentation. The source code, which is nearly 45 years old, has been released under the MIT license, allowing ...

Microsoft's version of MS-DOS 4.0 was originally released back in 1986 after a joint development with IBM for portions of the code, and a somewhat difficult relationship between the two at the ...

DR-DOS allowed me to run 4 instances of WWIV BBS on a 486DX2. Two Zyxel and two US Robotics modems. 20GB of downloads (on request, CD/tape library), 450 feeds/channels.

Working with internet archivists and software enthusiasts, OSPO and Starfrost were able to find the full source code of MS-DOS 4.00, which Microsoft is now releasing together with Ozzie's beta ...