Microsoft has released the code to MS-DOS 4.00 on GitHub; Dave takes you a tour of the code, builds it, and runs it on original hardware. For my book on lif...
DOS wasn’t a very complex OS and has already been reverse engineered more or less completely. Apps like DosBox already exist. It might cause a couple of minor revelations if/when the source is finally opened but I doubt it will have a big impact.
What are the consequences of this
Like does this mean they could develop an app where you just have a library with all those nostalgic legacy games
Very little. Older versions had already been open-sourced previously. This is specifically version 4.0, and the last version released was 8.0.
Technically correct, but 7 and 8 were part of Windows 9x.
The last standalone version was 6.22
DOS wasn’t a very complex OS and has already been reverse engineered more or less completely. Apps like DosBox already exist. It might cause a couple of minor revelations if/when the source is finally opened but I doubt it will have a big impact.