From 051d21bebb7f1cd8da1ef56c567a7fb0edd610f5 Mon Sep 17 00:00:00 2001
From: Thomas Jentzsch <tjentzsch@yahoo.de>
Date: Sun, 19 Sep 2021 17:39:17 +0200
Subject: [PATCH] improved TIA randomization

---
 src/emucore/tia/TIA.cxx | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/emucore/tia/TIA.cxx b/src/emucore/tia/TIA.cxx
index 75d4ac0b4..cf0b35be8 100644
--- a/src/emucore/tia/TIA.cxx
+++ b/src/emucore/tia/TIA.cxx
@@ -200,13 +200,20 @@ void TIA::reset()
   initialize();
 
   if(myRandomize)
+  {
     for(uInt32 i = 0; i < 0x10000; ++i)
     {
       uInt16 address = mySystem->randGenerator().next() & 0x3F;
-      uInt8 value = mySystem->randGenerator().next();
-      poke(address, value);
-      cycle(2); // process delay queue
+      if(address <= 0x2F)
+      {
+        uInt8 value = mySystem->randGenerator().next();
+
+        poke(address, value);
+        cycle(2); // process delay queue
+      }
     }
+    cycle(100); // just to be sure :)
+  }
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -