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)+ T) _! k4 C! M: B3 `3 @3 x0 k
FME-7是一块声音芯片,说明如下: ! l6 g/ i4 f- |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