Because many of these chips were proprietary, finding detailed public documentation on them can be difficult. However, their role is essential: without a digital "map" of how this chip functions, the arcade games that rely on it cannot be played on modern computers. The Role of "MAME Exclusive" Content
Here is the legal distinction:
In the emulation community, "MAME exclusive" usually refers to arcade hardware that is only successfully emulated by MAME and not by other projects like FB Neo. sp5001abin mame exclusive