def stop_emulation(self):
logger.debug("stop SIS")
if self.sis:
progress = QtProgress(self)
progress.start(title="Halting", text="Wait while threads stop")
progress.update(value=20)
self.sis.stop()
progress.update(value=30)
self.sis.join()
self.sis = None
progress.end()
self._active = False
self.info_viewer.hide()