diff --git a/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs b/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs
index c680c70227..78e2996d6d 100644
--- a/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs
@@ -41,7 +41,7 @@ namespace BizHawk.Emulation.Cores.Atari.A7800Hawk
 
 		public MOS6502X cpu;
 		public Maria maria;
-		private bool _isPAL;
+		public bool _isPAL;
 		public M6532 m6532;
 		public TIA tia;
 
@@ -189,6 +189,10 @@ namespace BizHawk.Emulation.Cores.Atari.A7800Hawk
 			{
 				mapper = new MapperDefault();
 			}
+			if (m=="A78SG")
+			{
+				mapper = new MapperSG();
+			}
 
 			mapper.Core = this;
 		}