It was written in assembly code: https://github.com/microsoft/MS-DOS/tree/master/v2.0/source https://github.com/microsoft/MS-DOS/tree/master/v2.0/source This i

It was written in assembly code: https://github.com/microsoft/MS-DOS/tree/master/v2.0/source https://github.com/microsoft/MS-DOS/tree/master/v2.0/source This is a very old version, but I've seen bits and pieces of the last one they shipped and things like command.com and the "kernel" were nearly the same as this, except for maybe some memory management changes. What part did you want to reimplement?