Port of EightBit library to .Net (unworking!)

Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>

EightBit/InputOutput.cs

@@ -0,0 +1,50 @@
+namespace EightBit
+{
+    using System;
+
+    public sealed class InputOutput
+    {
+        private byte[] input;
+        private byte[] output;
+
+        public InputOutput()
+        {
+            input = new byte[0x100];
+            output = new byte[0x100];
+        }
+
+        public event EventHandler<PortEventArgs> ReadingPort;
+        public event EventHandler<PortEventArgs> ReadPort;
+
+        public event EventHandler<PortEventArgs> WritingPort;
+        public event EventHandler<PortEventArgs> WrittenPort;
+
+        byte Read(byte port) { return ReadInputPort(port); }
+        void Write(byte port, byte value) { WriteOutputPort(port, value); }
+
+        byte ReadInputPort(byte port)
+        {
+            OnReadingPort(port);
+            var value = input[port];
+            OnReadPort(port);
+            return value;
+        }
+
+        void WriteInputPort(byte port, byte value) => input[port] = value;
+
+        byte ReadOutputPort(byte port) => output[port];
+
+        void WriteOutputPort(byte port, byte value)
+        {
+            OnWritingPort(port);
+            output[port] = value;
+            OnWrittenPort(port);
+        }
+
+        private void OnReadingPort(byte port) => ReadingPort?.Invoke(this, new PortEventArgs(port));
+        private void OnReadPort(byte port) => ReadPort?.Invoke(this, new PortEventArgs(port));
+
+        private void OnWritingPort(byte port) => WritingPort?.Invoke(this, new PortEventArgs(port));
+        private void OnWrittenPort(byte port) => WrittenPort?.Invoke(this, new PortEventArgs(port));
+    }
+}