Konami SCC
The Konami SCC (Sound Custom Chip or Sound Creative Chip) is a custom sound chip that was developed by Konami with Yamaha. It is one of several sound/memory management chips Konami developed in-house that ended up in use in home computer and video game systems from the late 1980s into the 1990s until the fourth generation systems were prolific.
Read more about Konami SCC: Uses, Physical Description, Capabilities, Programming The SCC, Deformation Register (98E0h), More On Memory