Fixed the .address property behaviour

src/memory/mmc.js

 
   get address(){return this.__addr;}
   set address(a){
-    if (a >= 0 && a < this.size){
-      this.__addr = a;
-      let offset = 0;
-      for (let s=0; s < this.__switches.length; s++){
-        if (a >= offset && a < offset + this.__switches[s].mem.size){
-          this.__sidx = s;
-          this.__switches[s].mem.address = a - offset;
-          break;
-        } else {
-          offset += this.__switches[s].mem.size;
-        }
+    this.__addr = Math.min(this.size - 1, Math.max(0, a));
+    let offset = 0;
+    for (let s=0; s < this.__switches.length; s++){
+      if (this.__addr >= offset && this.__addr < offset + this.__switches[s].mem.size){
+        this.__sidx = s;
+        this.__switches[s].mem.address = this.__addr - offset;
+        break;
+      } else {
+        offset += this.__switches[s].mem.size;
       }
     }
   }