Fixed per scanline interrupts. No artifacts in MMCOI

Core/SmsMachine.cs

@@ -73,5 +73,30 @@ namespace Core
                 }
             }
         }
+        public void SaveState(string filePath)
+        {
+            using (var fs = new System.IO.FileStream(filePath, System.IO.FileMode.Create))
+            using (var bw = new System.IO.BinaryWriter(fs))
+            {
+                Cpu.SaveState(bw);
+                MemoryBus.SaveState(bw);
+                VideoProcessor.SaveState(bw);
+                AudioProcessor.SaveState(bw);
+            }
+        }
+
+        public void LoadState(string filePath)
+        {
+            if (!System.IO.File.Exists(filePath)) return;
+
+            using (var fs = new System.IO.FileStream(filePath, System.IO.FileMode.Open))
+            using (var br = new System.IO.BinaryReader(fs))
+            {
+                Cpu.LoadState(br);
+                MemoryBus.LoadState(br);
+                VideoProcessor.LoadState(br);
+                AudioProcessor.LoadState(br);
+            }
+        }
     }
 }