From 20c21177ea7672b414e36474194e2176ac9e0630 Mon Sep 17 00:00:00 2001
From: Christian Speckner <christian.speckner@mayflower.de>
Date: Tue, 17 Oct 2017 22:05:27 +0200
Subject: [PATCH] No jitter simulation during the initial garbage frames.

---
 src/emucore/tia/frame-manager/FrameManager.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/emucore/tia/frame-manager/FrameManager.cxx b/src/emucore/tia/frame-manager/FrameManager.cxx
index 6d2b407f8..283b6e7d1 100644
--- a/src/emucore/tia/frame-manager/FrameManager.cxx
+++ b/src/emucore/tia/frame-manager/FrameManager.cxx
@@ -143,7 +143,10 @@ void FrameManager::setState(FrameManager::State state)
   switch (myState) {
     case State::waitForFrameStart:
       notifyFrameComplete();
-      myJitterEmulation.frameComplete(myCurrentFrameFinalLines);
+
+      if (myTotalFrames > Metrics::initialGarbageFrames)
+        myJitterEmulation.frameComplete(myCurrentFrameFinalLines);
+
       notifyFrameStart();
 
       myVsyncLines = 0;