From db194a828849f2dc8c55f1cd5c8d74050621a2b5 Mon Sep 17 00:00:00 2001
From: TollyH <ptolemyhill@sky.com>
Date: Mon, 23 Oct 2023 15:35:35 +0100
Subject: [PATCH] Fix multiplication carry flag behaviour

---
 Processor.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Processor.cs b/Processor.cs
index 189c745..e6d23b4 100644
--- a/Processor.cs
+++ b/Processor.cs
@@ -454,7 +454,7 @@ public bool Execute(bool runUntilHalt, Stream? stdoutOverride = null)
 
                                 Registers[(int)Register.rsf] &= ~(ulong)StatusFlags.Overflow;
 
-                                if (result < initial)
+                                if (result < initial && mathend != 0)
                                 {
                                     Registers[(int)Register.rsf] |= (ulong)StatusFlags.Carry;
                                 }