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) # W( ?; o7 t3 V4 f Z2 @1 ^% N Y* pFME-7是一块声音芯片,说明如下: 6 P6 B: a3 E0 Y2 E+ a3 y3 ~, R, yThe 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