Implemented a load of Z80 OpCodes. Added SimpleIOBus.

Desktop/Form1.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Windows.Forms;
 using Core.Cpu;
+using Core.Io;
 using Core.Memory;
 
 namespace Desktop
@@ -9,6 +10,7 @@ namespace Desktop
     {
         private Z80 _cpu = null!;
         private MemoryBus _memoryBus = null!;
+        private SimpleIoBus _simpleIoBus = null!;
 
         public Form1()
         {
@@ -22,16 +24,16 @@ namespace Desktop
             {
                 // 1. Initialize the memory bus
                 _memoryBus = new MemoryBus();
+                _simpleIoBus = new SimpleIoBus();
 
-                // 2. Load the ROM from disk
-                // Make sure "48.rom" matches the name of the file you added to your project
+                // 2. Load the ROM 
                 byte[] romData = RomLoader.Load("48.rom");
 
                 // 3. Inject the ROM into the memory bus
                 _memoryBus.LoadRom(romData);
 
                 // 4. Initialize the CPU with the populated memory
-                _cpu = new Z80(_memoryBus);
+                _cpu = new Z80(_memoryBus, _simpleIoBus);
 
                 DebuggerForm debugger = new DebuggerForm(_cpu, _memoryBus);
                 debugger.Show();