Well, in short, my question is: how does all this work?
For me, a VST is some kind of DLL plugin that I can load inside DAW software and such. Couldn't find one.
I found the -listmidi command in MAME already, and my MIDI interface is detected properly, and selected as default MIDI in.
But when I run the FB-01 machine with regular MAME, basically nothing happens. I get the UI, and the buttons appear to respond. But it doesn't give any sound when I play on my MIDI keyboard. I have no way of checking if the FB-01 machine even receives the MIDI input, let alone that it processes it.
As for AMAME, I read stuff about how it has a different UI, based on a WebGui. I can find the HTML files, which look like the example screenshots in GitHub. But I have no idea how I can get these from MAME. When I run MAME64.EXE from my build, I just get the same FB-01 machine UI as I got from regular MAME. And again, no sound.
Also, how would the IBM Music Feature Card emulation work with MAME?
Basically, I don't know anything about MAME, I just read all these things that it is supposed to support, but I can find absolutely no information on how I can set up and test these things.