-void S9xUsage ();
-void S9xInitDisplay (int argc, const char **argv);
-void S9xDeinitDisplay ();
-void S9xInitInputDevices ();
-void S9xSetTitle (const char *title);
-void S9xProcessEvents (bool8_32 block);
-void S9xPutImage (int width, int height);
-void S9xParseDisplayArg (char **argv, int &index, int argc);
-void S9xToggleSoundChannel (int channel);
-void S9xSetInfoString (const char *string);
-int S9xMinCommandLineArgs ();