It uses the SEI333 (COPX-D3) system, which is relatively simple compared to what the original Zero Team uses and is already well-emulated.
I'd be interested to know if this set also removes 3P/4P support like the previously dumped set of New Zero Team. (Seibu actually kept the 3P/4P input reads in several of the SPI System games, despite that none of them actually support more than two players.)