void S9xPutImage (int width, int height);
void S9xParseDisplayArg (char **argv, int &index, int argc);
void S9xToggleSoundChannel (int channel);
void S9xPutImage (int width, int height);
void S9xParseDisplayArg (char **argv, int &index, int argc);
void S9xToggleSoundChannel (int channel);