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) F$ p, k, m% m5 K+ bFME-7是一块声音芯片,说明如下:% [ O1 b& V. V1 v) I. J
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