-Mapped .ROM to Intellivision.

--If a future system uses this extension, the condition:

Rom[0] == 0xA8 && Rom[1] == (0xFF ^ Rom[2])

...can verify if the file is in fact an IntelliCart, though I doubt this is a permanent solution to the more underlying problem.

BizHawk.Emulation/Database/Database.cs

@@ -139,6 +139,7 @@ namespace BizHawk
 				case ".NES": Game.System = "NES"; break;
 				case ".A26": Game.System = "A26"; break;
 				case ".COL": Game.System = "COLV"; break;
+				case ".ROM":
                 case ".INT": Game.System = "INTV"; break;
 			}