Edit in JSFiddle

SS = {
 
    setup: function(target, signals, slots){
       
        function fireSetup(sigName){ return function(){
            console.log('told to fire signal: ' + sigName, arguments);
           
            if(this._listeners[sigName])
            for(var i = 0; i < this._listeners[sigName].length; i++){
                this._listeners[sigName][i].apply(this, arguments);
            }
        } }
        
        var i;
        
        // setup helper methods
        for(i in this){
            if(this.hasOwnProperty(i) && i !== 'setup'){
                target[i] = this[i];      
            }
        }
        
        // setup signals
        for(i = 0; i < signals.length; i++){
           target['_'+signals[i]] = fireSetup(signals[i]);
            target[signals[i]] = signals[i];
        }
        
        console.log('target after signals', target);
        
        // setup slots
        for(i in slots){
            target[i] = slots[i];   
        }
        
        return target;
    }
               
               
    ,connect: function(signal, slot){
        if(typeof slot !== 'function') throw new Error('Slot must be a function');
        if(typeof(this['_' + signal]) !== 'function') throw new Error('Signal not found: ' + signal);
                
        if(!this._listeners) this._listeners = {};
        if(!this._listeners[signal]) this._listeners[signal] = [];
        
        this._listeners[signal].push(slot);
    }
    ,disconnect: function(){}
            ,emit: function(sig){}
};

        
        
        
        (function(exports){
        
            
            //var signals = {
            //     ready: function ready(){}
            //    ,data: function data(){}
            //    ,die: function die(){}    
            //}
            
            var signals = ['READY', 'DATA', 'DIE'];
                
            // SLOTS
            var slots = {
                refresh: function refresh(data){ console.log('told to refresh'); }   
            }
            
            function MyObj(){}
            MyObj.prototype = {
                
                doSomethingAsync: function(){
                    var self = this;
                    setTimeout(function(){
                        self._DATA('behold! i am data!', 'so am i');
                    }, 1000);
                }    
                
            };
            
            
            SS.setup(MyObj.prototype, signals, slots);
            window.MyObj = MyObj;
            
        })(window);

        var my = new MyObj();
        var myToo = new MyObj();
        my.doSomethingAsync();
        my.connect(my.DATA, myToo.refresh);
        console.log(my, MyObj, MyObj.prototype);