I got curious with this one, I've been using both MESS and Toshiya Takeda's emulator (eSCV) for this system. I found eSCV to have the better compatibility with only Pole Position 2 not working and Mappy playing way too fast due to (possibly) timing issues which also happens on MESS. The only problem with eSCV is that it only supports 1 controller, so you can't play 2 player games which is possible in MESS.
Anyway, I was checking progetto-SNAPS screenshots for SCV, here's a link:http://www.progettosnaps.net/mess_preview/scv.html
And surprisingly I see a screenshot for Pole Position 2, and it's stated that all captures were taken directly from MESS. So my question is how was it possible to capture that screen if the game simply hangs before starting a race? I can see any kind of configuration to change so I wonder how this was done?