case 0x100:     ret = "(System Reset)"; break;
        case 0x200:     ret = "(Machine Check)"; break;
        case 0x300:     ret = "(Data Access)"; break;
-       case 0x380:     ret = "(Data SLB Access)"; break;
+       case 0x380:
+               if (radix_enabled())
+                       ret = "(Data Access Out of Range)";
+               else
+                       ret = "(Data SLB Access)";
+               break;
        case 0x400:     ret = "(Instruction Access)"; break;
-       case 0x480:     ret = "(Instruction SLB Access)"; break;
+       case 0x480:
+               if (radix_enabled())
+                       ret = "(Instruction Access Out of Range)";
+               else
+                       ret = "(Instruction SLB Access)";
+               break;
        case 0x500:     ret = "(Hardware Interrupt)"; break;
        case 0x600:     ret = "(Alignment)"; break;
        case 0x700:     ret = "(Program Check)"; break;