Not really PC-98-hardware-related, not really master.lib-related, so
yeah, that's really the best place for it.
Part of P0116, funded by [Anonymous] and Lmocinemod.
Too bad we still have to bother with renaming the function via #define
in the few cases where an executable contains two or more copies of
this function. We can't just make it `static`, since TH02 MAINE.EXE
actually does far-call it from a different segment (and thus,
translation unit).
Part of P0094, funded by Yanga.
nmlgc