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) ( ^' B* ?9 L: k! p$ w0 U1 SFME-7是一块声音芯片,说明如下: ~' t3 i' l+ [! h- Y/ K' h. E
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