Linflas
Lifer
This.
386s and 486s might technically qualify as "vintage," but I don't consider it as such. The "true" stuff is much older and radically different in terms of hardware and software. You can get emulators for Amiga, for example, but I've never had a great experience with them. The emulators never seem to get it quite right.
I worked with one called ASSIST to learn 360/370 assembler that worked surprisingly well.
https://en.wikipedia.org/wiki/ASSIST_(computing)