From be8db22d6c1db1464bf96e740b91f23ed9ceffdf Mon Sep 17 00:00:00 2001
From: adelikat <adelikat@tasvideos.org>
Date: Sun, 1 Mar 2020 10:10:47 -0600
Subject: [PATCH] mgba- throw NotImplemented on callbacks with no address, we
 don't support that yet (likely ever)

---
 .../Consoles/Nintendo/GBA/MGBAMemoryCallbackSystem.cs        | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/MGBAMemoryCallbackSystem.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/MGBAMemoryCallbackSystem.cs
index c2155e3204..21b07ac5d8 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/MGBAMemoryCallbackSystem.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/MGBAMemoryCallbackSystem.cs
@@ -43,6 +43,11 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 				throw new InvalidOperationException($"{callback.Scope} is not currently supported for callbacks");
 			}
 
+			if (!callback.Address.HasValue)
+			{
+				throw new NotImplementedException("Wildcard callbacks (no address specified) not currently implemented.");
+			}
+
 			var container = new CallbackContainer(callback);
 
 			if (container.Callback.Type == MemoryCallbackType.Execute)