diff --git a/src/BizHawk.Client.EmuHawk/Input/Input.cs b/src/BizHawk.Client.EmuHawk/Input/Input.cs
index e4b84c48e9..a3685b1443 100644
--- a/src/BizHawk.Client.EmuHawk/Input/Input.cs
+++ b/src/BizHawk.Client.EmuHawk/Input/Input.cs
@@ -331,6 +331,11 @@ namespace BizHawk.Client.EmuHawk
 			
 		}
 
+		/// <summary>
+		/// Controls whether MainForm generates input events. should be turned off for most modal dialogs
+		/// </summary>
+		public Func<bool, AllowInput> MainFormInputAllowedCallback;
+
 		private void UpdateThreadProc()
 		{
 			while (true)
@@ -390,12 +395,12 @@ namespace BizHawk.Client.EmuHawk
 					if (_newEvents.Count != 0)
 					{
 						//WHAT!? WE SHOULD NOT BE SO NAIVELY TOUCHING MAINFORM FROM THE INPUTTHREAD. ITS BUSY RUNNING.
-						AllowInput allowInput = GlobalWin.MainForm.AllowInput(false);
+						AllowInput allowInput = MainFormInputAllowedCallback(false);
 
 						foreach (var ie in _newEvents)
 						{
 							//events are swallowed in some cases:
-							if (ie.LogicalButton.Alt && ShouldSwallow(GlobalWin.MainForm.AllowInput(true), ie))
+							if (ie.LogicalButton.Alt && ShouldSwallow(MainFormInputAllowedCallback(true), ie))
 								continue;
 							if (ie.EventType == InputEventType.Press && ShouldSwallow(allowInput, ie))
 								continue;
@@ -461,7 +466,7 @@ namespace BizHawk.Client.EmuHawk
 			lock (this)
 			{
 				if (_inputEvents.Count == 0) return null;
-				AllowInput allowInput = GlobalWin.MainForm.AllowInput(false);
+				AllowInput allowInput = MainFormInputAllowedCallback(false);
 
 				//wait for the first release after a press to complete input binding, because we need to distinguish pure modifierkeys from modified keys
 				//if you just pressed ctrl, wanting to bind ctrl, we'd see: pressed:ctrl, unpressed:ctrl
diff --git a/src/BizHawk.Client.EmuHawk/MainForm.cs b/src/BizHawk.Client.EmuHawk/MainForm.cs
index f954bfb85f..4153f3023e 100644
--- a/src/BizHawk.Client.EmuHawk/MainForm.cs
+++ b/src/BizHawk.Client.EmuHawk/MainForm.cs
@@ -372,6 +372,40 @@ namespace BizHawk.Client.EmuHawk
 				Sound?.StartSound();
 			};
 
+			Input.Instance.MainFormInputAllowedCallback = yieldAlt => {
+				// the main form gets input
+				if (ActiveForm == this)
+				{
+					return Input.AllowInput.All;
+				}
+
+				// even more special logic for TAStudio:
+				// TODO - implement by event filter in TAStudio
+				if (ActiveForm is TAStudio maybeTAStudio)
+				{
+					if (yieldAlt || maybeTAStudio.IsInMenuLoop)
+					{
+						return Input.AllowInput.None;
+					}
+				}
+
+				// modals that need to capture input for binding purposes get input, of course
+				if (ActiveForm is HotkeyConfig
+					|| ActiveForm is ControllerConfig
+					|| ActiveForm is TAStudio
+					|| ActiveForm is VirtualpadTool)
+				{
+					return Input.AllowInput.All;
+				}
+
+				// if no form is active on this process, then the background input setting applies
+				if (ActiveForm == null && Config.AcceptBackgroundInput)
+				{
+					return Config.AcceptBackgroundInputControllerOnly ? Input.AllowInput.OnlyController : Input.AllowInput.All;
+				}
+
+				return Input.AllowInput.None;
+			};
 			Input.Instance.Adapter.FirstInitAll(Handle);
 			InitControls();
 
@@ -798,45 +832,6 @@ namespace BizHawk.Client.EmuHawk
 			AddOnScreenMessage("Core reboot needed for this setting");
 		}
 
-		/// <summary>
-		/// Controls whether the app generates input events. should be turned off for most modal dialogs
-		/// </summary>
-		public Input.AllowInput AllowInput(bool yieldAlt)
-		{
-			// the main form gets input
-			if (ActiveForm == this)
-			{
-				return Input.AllowInput.All;
-			}
-
-			// even more special logic for TAStudio:
-			// TODO - implement by event filter in TAStudio
-			if (ActiveForm is TAStudio maybeTAStudio)
-			{
-				if (yieldAlt || maybeTAStudio.IsInMenuLoop)
-				{
-					return Input.AllowInput.None;
-				}
-			}
-
-			// modals that need to capture input for binding purposes get input, of course
-			if (ActiveForm is HotkeyConfig
-				|| ActiveForm is ControllerConfig
-				|| ActiveForm is TAStudio
-				|| ActiveForm is VirtualpadTool)
-			{
-				return Input.AllowInput.All;
-			}
-
-			// if no form is active on this process, then the background input setting applies
-			if (ActiveForm == null && Config.AcceptBackgroundInput)
-			{
-				return Config.AcceptBackgroundInputControllerOnly ? Input.AllowInput.OnlyController : Input.AllowInput.All;
-			}
-
-			return Input.AllowInput.None;
-		}
-
 		// TODO: make these actual properties
 		// This is a quick hack to reduce the dependency on Globals
 		public IEmulator Emulator