Just found out about this site. Below is DOS V1.1 and V2.0 with theyr source code. I hope the
The Computer History Museum is a nonprofit organization with a four-decade history as the world’s leading institution exploring the history of computing and its ongoing impact on society. The Museum is dedicated to the preservation and celebration of computer history and is home to the largest international collection of computing artifacts in the world, encompassing computer hardware, software, documentation, ephemera, photographs, oral histories, and moving images.