plain old FIXEDSYS will never display anything outside of 1-255, except for font linking where capable.
U+0301 is outside of 1-255. In absence of font-linking, nothing could be displayed.
In Fixedsys Excelsior 3.01 NoLig, it looks goofy/broken, because ligaturization is purposefully damaged. I think that's why it doesn't work at least.
