Link should be:
https://lunduke.locals.com/post/5565411/ms-dos-4-0-source-code-fails-to-compile https://lunduke.locals.com/post/5565411/ms-dos-4-0-source-co...
Changed now from https://lunduke.substack.com/p/ms-dos-40-source-code-fails-to-compile https://lunduke.substack.com/p/ms-dos-40-source-code-fails-t.... Thanks!