diff --git a/BizHawk.Emulation.Cores/Consoles/Atari/2600/Atari2600.cs b/BizHawk.Emulation.Cores/Consoles/Atari/2600/Atari2600.cs
index 587688fa25..444fc820a8 100644
--- a/BizHawk.Emulation.Cores/Consoles/Atari/2600/Atari2600.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Atari/2600/Atari2600.cs
@@ -43,7 +43,9 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 			this.game = game;
 
 			if (!game.GetOptionsDict().ContainsKey("m"))
+			{
 				DetectMapper();
+			}
 
 			Console.WriteLine("Game uses mapper " + game.GetOptionsDict()["m"]);
 			HardReset();
@@ -56,6 +58,14 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 			{
 				case 2048: m = "2K"; break;
 				case 4096: m = "4K"; break;
+				case 8192: m = "F8"; break;
+				case 16384: m = "F6"; break;
+				case 12288: m = "FA"; break;
+				case 32768: m = "F4"; break;
+				case 65536: m = "EF"; break;
+				case 131072: m = "MC"; break;
+				case 262144: m = "3F"; break;
+				case 524288: m = "3F"; break;
 			}
 			game.AddOption("m", m);
 		}