We just open-sourced DOS 4 (and found binaries of Multitasking DOS 4) https://www.hanselman.com/blog/open-sourcing-dos-4
@shanselman Incredible release tho. But I still couldn't figure out why it errors out under the compiler, under a much more native environment than modern Windows. I did the build under FreeDOS 1.3 on an emulated Pentium II environment.
While I am looking forward to sorting through those issues, it's still nice that a piece of tech history is preserved in any way.
