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)/ [ u- R `! S- m. j
FME-7是一块声音芯片,说明如下: 8 M6 N. p- c9 w6 r+ y1 u6 ]9 G5 x5 oThe 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