OBTW, I'd love to do the "bannister in mame" thing, but I'm not sure I'll be able to get any web browsers working on this system.
I'm not sure whether the bannister.org-inside-MAME thing is still possible with older browsers these days, the forum software has had a major update since the last post was made in that topic (back in early 2017), as well as the site going to HTTPS. For example, a freshly-installed XP system with nothing but IE6 completely fails to load the site at all. Replying to a topic is also enough to slow down my old 2.8 GHz Celeron, whereas previously it was possible to use this forum at full speed even on a 486. By 1000 characters, I can watch the Celeron display the text character by character seconds after typing everything, getting progressively slower with every character typed (which didn't happen here until the update).