Playing Acorn Games with IBM PC on MS-DOS?

[fishy_fiz]

Nope, cant run dosbox on an archimedes, and especially not pc floppies.
Dosbox for risc os is for other risc os hardware (like rpi as kolla mentioned).

Also, you can run arcem, along with some other archimedes emulators under dos.
Pretty much anything using sdl can be used under dos if you use something like hx extender. You can also use some win9x software (command line mostly) using similar dos extensions.

[fishy_fiz]

Nah, probably not.
While not up to amiga os standards, risc os, for its time, wasnt too bad.
I personally quite like dos, but it is, and always was, quite archaic.
It has some advanced software, but it doesnt necessarily use OS functions.