Interesting i wonder if they're emulating it.?? and if so whether the code could be probed to help with the emulation of Zero Team and as yet one other non working game using the cop prot Seibu cup Soccer, i guess we'll need to keep an eye on certain MAME dev blogs and the commits to find out either way.
Edit seems they are indeed using some form of emulator Zero team being the latest in a long line of games released under the Arcade Archives label, hmm i never knew these games were being rereleased before now which is strange seeing as im big into arcade games and all.