More opcodes, some helpers

MCEmuCore.GBMonolith/IMemory.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace MCEmuCore.GBMonolith
+{
+    interface IMemory
+    {
+        byte ReadByte(int address);
+        ushort ReadShort(int address);
+        bool WriteByte(int address, byte value);
+        bool WriteShort(int address, ushort value);
+    }
+}