You can put DOS on a USB key and boot basically any 21st century x86 box straight into DOS.
I have a hobby project that does just that:
https://github.com/lproven/usb-dos
And yes, that includes UEFI boxes:
https://github.com/CSMWrap/CSMWrap
(No, I have not tried this myself yet. I own very few UEFI-only machines. I personally have no use for it.)
You can put DOS on a USB key and boot basically any 21st century x86 box straight into DOS.
I have a hobby project that does just that:
https://github.com/lproven/usb-dos
And yes, that includes UEFI boxes:
https://github.com/CSMWrap/CSMWrap
(No, I have not tried this myself yet. I own very few UEFI-only machines. I personally have no use for it.)