[hotnfresh]

Some early PCs would boot to a basic environment if it couldn’t boot to any other OS. Not sure if that extended to machines that could run Win3.1, but IBM 8088 PC-XTs (and similar, but that’s what I had) definitely did that, though normally one would boot them to DOS.

[cassianoleal]

MSX would boot to BASIC by default. It was possible to run MSX-DOS instead but not entirely necessary.