From d6fbc23b60f1a16d0da9bff33e2c367c5e27db22 Mon Sep 17 00:00:00 2001
From: Christian Speckner <christian.speckner@mayflower.de>
Date: Wed, 29 Mar 2017 17:46:25 +0200
Subject: [PATCH] Fix cursor in frame preview.

---
 src/emucore/tia/TIA.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/emucore/tia/TIA.cxx b/src/emucore/tia/TIA.cxx
index 837596e93..18ecb4eed 100644
--- a/src/emucore/tia/TIA.cxx
+++ b/src/emucore/tia/TIA.cxx
@@ -759,7 +759,9 @@ void TIA::enableColorLoss(bool enabled)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 bool TIA::electronBeamPos(uInt32& x, uInt32& y) const
 {
-  x = clocksThisLine();
+  uInt8 clocks = clocksThisLine();
+
+  x = clocks < 68 ? 0 : clocks - 68;
   y = myFrameManager.getY();
 
   return isRendering();