Atari 2600: Implemented the reset button

BizHawk.Emulation/Consoles/Atari/2600/Atari2600.Core.cs

@@ -13,6 +13,8 @@ namespace BizHawk
 		public M6532 m6532;
 		public TIA tia;
 
+		bool resetSignal;
+
 		// The Atari 2600 memory mapper looks something like this...usually
 
 		// N/A  Page #  
@@ -122,6 +124,13 @@ namespace BizHawk
 		public void FrameAdvance(bool render)
 		{
 			Frame++;
+			if (resetSignal)
+			{
+				//cpu.PC = cpu.ReadWord(MOS6507.ResetVector);
+				m6532.resetOccured = true;
+				//m6532.swchb &= 0xFE;
+				//cpu.FlagI = true;
+			}
 			//cpu.Execute(228);
 			//cpu.Execute(2000);
 
@@ -143,6 +152,7 @@ namespace BizHawk
 				}
 				
 			}
+			resetSignal = Controller["Reset"];
 			//clear the framebuffer (hack code)
 			if (render == false) return;
 			/*

BizHawk.Emulation/Consoles/Atari/2600/M6532.cs

@@ -19,6 +19,10 @@ namespace BizHawk.Emulation.Consoles.Atari
 
 		Atari2600 core;
 
+		public byte swchb = 0x0B;
+
+		public bool resetOccured = false;
+
 
 		public M6532(MOS6507 cpu, byte[] ram, Atari2600 core)
 		{
@@ -79,7 +83,9 @@ namespace BizHawk.Emulation.Consoles.Atari
 					}
 					else if (maskedAddr == 0x02) // SWCHB
 					{
-						return 0x3F;
+						bool temp = resetOccured;
+						resetOccured = false;
+						return (byte)(0x0A | (temp ? 0x00 : 0x01));
 					}
 					else if (maskedAddr == 0x03) // SWBCNT
 					{
@@ -130,6 +136,10 @@ namespace BizHawk.Emulation.Consoles.Atari
 
 					interruptEnabled = ((addr & 0x08) != 0);
 				}
+				else if ((addr & 0x04) == 0 && (maskedAddr & 0x03) == 0x02)
+				{
+					swchb = value; 
+				}
 				else
 				{
 					Console.WriteLine("6532 register write: " + maskedAddr.ToString("x"));