internal关键词用于限定成员变量访问范围(没记错的话,C++太久没看了) ! N+ y/ m$ |9 J2 \% Q; DFME-7是一块声音芯片,说明如下:( o* G/ g" a" _, [
The FME-7 was made by Sunsoft and used as an extension soundchip in Nintendo Famicom / NES Games. It was only used in a single Sunsoft Game (Gimmick!) and is otherwise known as the Mapper 69