10-06-2011, 05:45 PM
It is due to the emulation of the chips that might not be perfect and Konami's custom chips are hard to emulate. Anyway according to MAMEtesters, there is a bug in the emulation that seems similar to the one that you described here: http://mametesters.org/view.php?id=1858
Until if or when it gets fixed, you might have to try an older version of MAME. Anything older than 0.118u2 (where it crashes at the 2nd boss) should do.
Until if or when it gets fixed, you might have to try an older version of MAME. Anything older than 0.118u2 (where it crashes at the 2nd boss) should do.