US EditionMicrosoft Open-Sources "the Earliest DOS Source Code Discovered to Date"
8 Articles
8 Articles
45 years after its release, the source code of the very first 86-DOS has just landed on GitHub. Microsoft took advantage of this anniversary to publish the original assembly listings, accompanied by several versions of PC-DOS 1.00 and MS-DOS 1.25, under MIT license. All this is in the DOS-History/Paterson-Listings repository, and yes, all is compileable. These listings, Tim Paterson in person had kept them in his drawers since 1980. At that time…
After MS-DOS 1.x and 2.x in 2018 and MS-DOS 4.x in 2024, Microsoft has made the kernel 1.0 of 86-DOS and PC-DOS as well as numerous exciting internal documents and assembler expressions freely accessible to everyone.
DOS 1.00 source code is opened by Microsoft
Microsoft isn’t exactly known for being a leader in the open source community. From Bill Gates’ 1976 “An Open Letter to Hobbyists” to the present day, the company has made it clear that it isn’t too fond of sharing. However, once decades have passed since the last penny was squeezed out of a product, Microsoft is more willing to spill some secrets. Fortunately for those who are interested in early personal computing history, DOS 1.00 now falls i…
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