45 years later, earliest DOS source code transcribed from a stack of old printouts found in a garage — code was open-sourced to mark 86-DOS 1.00’s anniversary

Microsoft has open-sourced the earliest DOS source code, including the 86-DOS 1.00 kernel, PC-DOS 1.00 pre-release kernels, and utilities, to commemorate the 45th anniversary of 86-DOS 1.00. The code was transcribed from old dot matrix printouts found in Tim Paterson's garage and is now available on GitHub. This release offers insight into the development of MS-DOS/PC-DOS and operating system development practices of that era. Tinkerers can explore the code and even find tips on compiling and assembling the sources on Paterson's GitHub repository.