Sure :) although I don't know if that still means that the inner emulator is "highly portable" or "just works" exactly - at least compared to any other software.
(At the end of the day you shouldn't be running ZSNES anyway. In terms of accuracy, compatibility, even security: way better SNES emulators out there.)
(At the end of the day you shouldn't be running ZSNES anyway. In terms of accuracy, compatibility, even security: way better SNES emulators out there.)