Originally Posted by TeamE
the v.smile emu from segher boots more games as MAME. mame's driver is based on this emu, but what's the difference why some games do not boot?

Segher continued to develop his emulator. I ported it over to MAME exactly once and have not updated it since. And I don't have the interest to re-port it or update it right now. It's as simple as that.