Tidy Up

Core/Audio/SmsApu.cs

@@ -33,7 +33,9 @@ namespace Core.Audio
             0.1584f, 0.1258f, 0.1000f, 0.0794f, 0.0630f, 0.0501f, 0.0398f, 0.0f
         };
 
+#pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring as nullable.
         public SmsApu()
+#pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring as nullable.
         {
             Registers[1] = 0x0F;
             Registers[3] = 0x0F;

Core/Io/SmsIoBus.cs

@@ -6,8 +6,12 @@ namespace Core.Io
 {
     public class SmsIoBus : IIoBus
     {
+#pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring as nullable.
         public SmsVdp VideoProcessor { get; set; }
+#pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring as nullable.
+#pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring as nullable.
         public SmsApu AudioProcessor { get; set; }
+#pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring as nullable.
 
         // Joypad State (0xFF means no buttons pressed - the SMS uses Active-Low logic!)
         public byte Joypad1Keyboard = 0xFF;