From d3b270dea85c6c108a8445688c7cfca88e9a0813 Mon Sep 17 00:00:00 2001
From: thrust26 <tjentzsch@yahoo.de>
Date: Sat, 8 Dec 2018 09:53:00 +0100
Subject: [PATCH] fixed trapping on 'read from write port' functionality for
 CPU dummy peeks

---
 src/debugger/CartDebug.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/debugger/CartDebug.cxx b/src/debugger/CartDebug.cxx
index c6d575f3d..a555cc720 100644
--- a/src/debugger/CartDebug.cxx
+++ b/src/debugger/CartDebug.cxx
@@ -171,7 +171,9 @@ void CartDebug::triggerReadFromWritePort(uInt16 addr)
   myRWPortAddress = addr;
   mySystem.setDirtyPage(addr);
 
-  if(myRWPortTriggersBreak)
+  if(myRWPortTriggersBreak &&
+     mySystem.m6502().lastReadAddress() &&
+     (mySystem.getPageAccessType(addr) & System::PA_WRITE) == System::PA_WRITE)
   {
     ostringstream msg;
     msg << "RWP[@ $" << Common::Base::HEX4 << addr << "]: ";