So I also managed to get it compiled in fba-xxx and got s1945ii (not iii, that'll need a vmm) running at ~45 fps. However, the game was massively buggy, drawing random sprites everywhere. Once I get the bug fixed, it likely will improve greatly (as sprite drawing is generally pretty slow...). My friend kenshiro also tried it with an older version of mingw and the bug was present there also. ATM, I'm downloading all the crap to install VC and see how it goes from there. I'm terribly unexcited about all of this.