I thought I’d slap together some github thing with MS-DOS 2.11 that’s been made buildable thanks to a whole host of other smart people. The default stuff out there expects you to build it under MS-DOS using the long obsoleted ‘append’ utility which can add directories to a search path. Instead I created a bunch of makefiles that take advantage of MS-DOS Player, and let you build from Windows.
dos211: just the MS-DOS 2.11 sources, I re-aranged stuff and made it (slightly) easier to rebuild on Windows. (github.com)
building should be somewhat straightforward, assuming you have the ms-dos player in your path. JUST MAKE SURE YOU UNZIP as TEXT mode. If you are getting a million errors you probably have them in github’s favourite unix mode.
As an example building the bios by running make. For the impatiend you can download dos211.zip, which includes a bootable 360kb disk image, and a 32Mb vmdk!