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) " Z( C% Z( N4 n8 q9 ?& JFME-7是一块声音芯片,说明如下: 8 k/ N( o% j. m( xThe 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