MAMEWorld Forums - EmuChat

Usually games are only demoted to GNW when massive core or driver changes have taken place (see NES-based games in both MAME and MESS earlier this year), or games which in actual fact have never really worked in the first place (the Tekken 3 Ver.A dumps are an example of non-working games still listed as working, but in fact have never worked properly since being dumped, also producing the same results in non-public test versions of ZiNc back in 2004 or so).

Bang Bead (Prototype) [bangbedp] was removed from MAME as of 0.69 when another (real) Bang Bead set was added. The 'prototype' set turned out to be a decrypted bootleg/hack of the original version with a 100% match after comparing both sets after decryption of bangbead. On the real board/cartridge, only the physical ROM chips are different (bangbedp uses more smaller capacity ROMs), and the 'prototype' uses the S1 ROM, of which encrypted NeoGeo games do not.

Also, a few 'recent' Cave games were removed a while ago due to the company's request. Better to have a handful of non-rare games removed for the time being rather than having MAME itself removed.