Add reset button to colecovision

Fixes #992

BizHawk.Emulation.Cores/Consoles/Coleco/ColecoControllerDeck.cs

@@ -30,6 +30,10 @@ namespace BizHawk.Emulation.Cores.ColecoVision
 				Name = "ColecoVision Basic Controller",
 				BoolButtons = Port1.Definition.BoolButtons
 					.Concat(Port2.Definition.BoolButtons)
+					.Concat(new[]
+					{
+						"Power", "Reset"
+					})
 					.ToList()
 			};
 

BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.IEmulator.cs

@@ -12,6 +12,18 @@ namespace BizHawk.Emulation.Cores.ColecoVision
 		public void FrameAdvance(IController controller, bool render, bool renderSound)
 		{
 			_controller = controller;
+
+			// NOTE: Need to research differences between reset and power cycle
+			if (_controller.IsPressed("Power"))
+			{
+				HardReset();
+			}
+
+			if (_controller.IsPressed("Reset"))
+			{
+				SoftReset();
+			}
+
 			_cpu.Debug = _tracer.Enabled;
 			_frame++;
 			_isLag = true;

BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.cs

@@ -223,5 +223,17 @@ namespace BizHawk.Emulation.Cores.ColecoVision
 
 			////Console.WriteLine("Unhandled write at {0:X4}:{1:X2}", addr, value);
 		}
+
+		private void HardReset()
+		{
+			PSG.Reset();
+			_cpu.Reset();
+		}
+
+		private void SoftReset()
+		{
+			PSG.Reset();
+			_cpu.Reset();
+		}
 	}
 }