Dunno about either. I should try some of the old ASM competition stuff on it.
One thing I find very interesting is that one enterprising soul has even tried extending it to emulate the Roland MT-32. I had a bunch of old games that sounded really awesome on the MT-32. I don't have it hooked up to the PC any more as it's in my guitar rack now and is the sound source for my bass pedals. Eventually I'll try to get the MT-32 emulator version of DosBox working, but for now I'm happy with the adlib/soundblaster emulation in there already.
Now I just need to figure out how to get it to stretch the aspect ratio of a 320x200 game so that it's more realistic looking. As it stands right now, it displays such games in a 640x400 window, meaning that it looks a little stretched. Even playing full screen, it still doesn't stretch to fit the screen. Odd...