diff --git a/BizHawk.Client.Common/config/Config.cs b/BizHawk.Client.Common/config/Config.cs
index 87a885805f..f75c4c9a11 100644
--- a/BizHawk.Client.Common/config/Config.cs
+++ b/BizHawk.Client.Common/config/Config.cs
@@ -542,7 +542,7 @@ namespace BizHawk.Client.Common
 		public bool NES_InQuickNES = true;
 		public bool SNES_InSnes9x = true;
 		public bool GBA_UsemGBA = true;
-		public bool A78_UseEmu7800 = true;
+		public bool A78_UseEmu7800 = false;
 		public bool SGB_UseBsnes = false;
 		public bool CoreForcingViaGameDB = true;
 		public string LibretroCore;
diff --git a/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs b/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs
index 62c478b1d0..71c5e25826 100644
--- a/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs
@@ -231,7 +231,8 @@ namespace BizHawk.Emulation.Cores.Atari.A7800Hawk
 			ser.Register<ITraceable>(_tracer);
 
 			SetupMemoryDomains();
-			HardReset();		
+			ser.Register<IDisassemblable>(cpu);
+			HardReset();
 		}
 
 		public DisplayType Region => _isPAL ? DisplayType.PAL : DisplayType.NTSC;