From fdcff015dc7465859597459da07bca7ec9714266 Mon Sep 17 00:00:00 2001
From: BearOso <bearoso@gmail.com>
Date: Sat, 27 Apr 2024 17:44:21 -0500
Subject: [PATCH] CPU: Stop emulation if CPU is deadlocked.

---
 cpuexec.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/cpuexec.cpp b/cpuexec.cpp
index b905f018..aa43b2ff 100644
--- a/cpuexec.cpp
+++ b/cpuexec.cpp
@@ -143,6 +143,14 @@ void S9xMainLoop (void)
 			Op = CPU.PCBase[Registers.PCw];
 			CPU.Cycles += CPU.MemSpeed;
 			Opcodes = ICPU.S9xOpcodes;
+
+			if (CPU.Cycles > 1000000)
+			{
+				Settings.StopEmulation = true;
+				CPU.Flags |= HALTED_FLAG;
+				S9xMessage(S9X_FATAL_ERROR, 0, "CPU is deadlocked");
+				return;
+			}
 		}
 		else
 		{