From 5736f93fcd79de6fbb8fdc04fa4ddf6b74050a1f Mon Sep 17 00:00:00 2001
From: Christian Speckner <christian.speckner@mayflower.de>
Date: Mon, 4 Dec 2017 00:25:03 +0100
Subject: [PATCH] Add two "grace lines" of black when autodetecting ystart.

---
 src/emucore/Console.cxx | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/emucore/Console.cxx b/src/emucore/Console.cxx
index 763fb78dc..38e69324f 100644
--- a/src/emucore/Console.cxx
+++ b/src/emucore/Console.cxx
@@ -69,6 +69,10 @@
 
 #include "Console.hxx"
 
+namespace {
+  constexpr uInt8 YSTART_EXTRA = 2;
+}
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Console::Console(OSystem& osystem, unique_ptr<Cartridge>& cart,
                  const Properties& props)
@@ -245,7 +249,7 @@ void Console::autodetectYStart()
 
   myTIA->setFrameManager(myFrameManager.get());
 
-  myAutodetectedYstart = ystartDetector.detectedYStart();
+  myAutodetectedYstart = ystartDetector.detectedYStart() - YSTART_EXTRA;
 
   // Don't forget to reset the SC progress bars again
   myOSystem.settings().setValue("fastscbios", fastscbios);