Fair enough; I missed that mikro2nd mentioned safety-critical systems. In that case, sure, let's adapt the whole environment to allow for those mode changes. I

Fair enough; I missed that mikro2nd mentioned safety-critical systems. In that case, sure, let's adapt the whole environment to allow for those mode changes. I was thinking more about systems where no lives are at stake, and there I think there's no need to change modes, one can be DISRUPTIVE ENOUGH by using the same IO channels, which are quite flexible already.