微软在 Github 上开源了 MS-DOS v1.25 和 v2.0 供开发者参考。
MS-DOS v1.25 and v2.0 Source Code
This repo contains the original source-code and compiled binaries for MS-DOS 1.25 and MS-DOS 2.0.
These are the same files originally shared at the Computer History Museum on March 25th 2014 and are being (re)published in this repo to make them easier to find, reference-to in external writing and works, and to allow exploration and experimentation for those interested in early PC Operating Systems.
The source files in this repo are for historical reference and will be kept static, so please don’t send Pull Requests suggesting any modifications to the source files, but feel free to fork this repo and experiment
您可以在 Github 上访问该项目的源码：Microsoft/MS-DOS。