From c7c9963db3e528740a170f2e7bbb76b40eb23c41 Mon Sep 17 00:00:00 2001
From: Adrian Conlon <Adrian.conlon@gmail.com>
Date: Sat, 16 Nov 2019 22:29:42 +0000
Subject: [PATCH] Actually, the refresh register is incremented halfway through
 M1, as the M1 pin is raised.  i.e. just before the refresh phase of the M1
 cycle.

Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
---
 Z80/Z80.cs | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/Z80/Z80.cs b/Z80/Z80.cs
index b6bcb39..7877333 100644
--- a/Z80/Z80.cs
+++ b/Z80/Z80.cs
@@ -442,15 +442,15 @@ namespace EightBit
 
         protected virtual void OnRaisingM1() => this.RaisingM1?.Invoke(this, EventArgs.Empty);
 
-        protected virtual void OnRaisedM1() => this.RaisedM1?.Invoke(this, EventArgs.Empty);
+        protected virtual void OnRaisedM1()
+        {
+            ++this.REFRESH;
+            this.RaisedM1?.Invoke(this, EventArgs.Empty);
+        }
 
         protected virtual void OnLoweringM1() => this.LoweringM1?.Invoke(this, EventArgs.Empty);
 
-        protected virtual void OnLoweredM1()
-        {
-            ++this.REFRESH;
-            this.LoweredM1?.Invoke(this, EventArgs.Empty);
-        }
+        protected virtual void OnLoweredM1() => this.LoweredM1?.Invoke(this, EventArgs.Empty);
 
         protected virtual void OnRaisingRFSH() => this.RaisingRFSH?.Invoke(this, EventArgs.Empty);