diff --git a/BizHawk.Emulation/Consoles/Intellivision/Intellicart.cs b/BizHawk.Emulation/Consoles/Intellivision/Intellicart.cs
index e110c7ea3d..850619d473 100644
--- a/BizHawk.Emulation/Consoles/Intellivision/Intellicart.cs
+++ b/BizHawk.Emulation/Consoles/Intellivision/Intellicart.cs
@@ -9,22 +9,90 @@ namespace BizHawk.Emulation.Consoles.Intellivision
 	{
 		private ushort[] memory = new ushort[65536];
 
+		private ushort[] CRC16_table =
+		{
+			0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
+			0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
+			0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
+			0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
+			0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
+			0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
+			0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
+			0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
+			0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
+			0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
+			0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
+			0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
+			0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
+			0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
+			0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
+			0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
+			0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
+			0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
+			0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
+			0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
+			0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
+			0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
+			0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
+			0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
+			0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
+			0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
+			0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
+			0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
+			0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
+			0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
+			0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
+			0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
+		};
+
+		private ushort UpdateCRC16(ushort crc, byte data)
+		{
+			return (ushort)((crc << 8) ^ CRC16_table[(crc >> 8) ^ data]);
+		}
+
+		private ushort UpdateCRC16_Block(ushort crc, byte[] data, int start, int length)
+		{
+			for (int item = 0; item < length; item++)
+				crc = UpdateCRC16(crc, data[start + item]);
+			return crc;
+		}
+
 		public void Parse()
 		{
 			// Check to see if the header is valid.
 			if (Rom[0] != 0xA8 || Rom[1] != (0xFF ^ Rom[2]))
 				throw new ArgumentException();
+			int offset = 3;
+			for (int segment = 0; segment < Rom[1]; segment++)
+			{
+				int start = offset;
+				int low = Rom[offset++] << 8;
+				int high = (Rom[offset++] << 8) + 0xFF;
+				// This range is invalid if it starts at an higher range than it ends.
+				if (high < low)
+					throw new ArgumentException();
+				for (int addr = low; addr <= high; addr++)
+				{
+					int data;
+					data = (Rom[offset++] << 8) | (Rom[offset++] & 0xFF);
+					WriteCart((ushort)addr, (ushort)data);
+				}
+				int expected = (Rom[offset++] << 8) | (Rom[offset++] & 0xFF);
+				int actual = UpdateCRC16_Block(0xFFFF, Rom, start, 2 * (high - low) + 2);
+				// Check if there is an invalid CRC.
+				if (expected != actual)
+					throw new ArgumentException();
+			}
 		}
 
-		public ushort ReadMemory(ushort addr, out bool responded)
+		public ushort? ReadCart(ushort addr)
 		{
-			responded = false;
-			return 0;
+			return null;
 		}
 
-		public void WriteMemory(ushort addr, ushort value, out bool responded)
+		public bool? WriteCart(ushort addr, ushort value)
 		{
-			responded = false;
+			return null;
 		}
 	}
 }
diff --git a/BizHawk.Emulation/Interfaces/ICart.cs b/BizHawk.Emulation/Interfaces/ICart.cs
index 29c07ae47e..3e85b03e6c 100644
--- a/BizHawk.Emulation/Interfaces/ICart.cs
+++ b/BizHawk.Emulation/Interfaces/ICart.cs
@@ -7,7 +7,7 @@ namespace BizHawk
 {
 	public interface ICart
 	{
-		ushort ReadMemory(ushort addr, out bool responded);
-		void WriteMemory(ushort addr, ushort value, out bool responded);
+		ushort? ReadCart(ushort addr);
+		bool? WriteCart(ushort addr, ushort value);
 	}
 }
diff --git a/BizHawk.MultiClient/MainForm.cs b/BizHawk.MultiClient/MainForm.cs
index a4a275bfb6..4cd6f0926b 100644
--- a/BizHawk.MultiClient/MainForm.cs
+++ b/BizHawk.MultiClient/MainForm.cs
@@ -2509,7 +2509,7 @@ namespace BizHawk.MultiClient
 					"Genesis (experimental)", "*.gen;*.smd;*.bin;*.cue;%ARCH%",
 					"Gameboy (experimental)", "*.gb;%ARCH%",
 					"Colecovision (very experimental)", "*.col;%ARCH%",
-                    "Intellivision (very experimental)", "*.int;%ARCH%",
+                    "Intellivision (very experimental)", "*.int;*.bin;*.rom;%ARCH%",
 					"PSX Executables (experimental)", "*.exe",
 					"All Files", "*.*");
 			}