bsnes/sfc/coprocessor/nss/nss.hpp

struct NSS {
  uint8 dip;

  void init();
  void load();
  void unload();
  void power();
  void reset();

  void set_dip(uint16 dip);
  uint8 read(unsigned addr);
  void write(unsigned addr, uint8 data);
};

extern NSS nss;