diff --git a/BizHawk.Emulation/CPUs/CP1610/CP1610.cs b/BizHawk.Emulation/CPUs/CP1610/CP1610.cs
index 3172dafb78..5d9fb40012 100644
--- a/BizHawk.Emulation/CPUs/CP1610/CP1610.cs
+++ b/BizHawk.Emulation/CPUs/CP1610/CP1610.cs
@@ -15,7 +15,7 @@ namespace BizHawk.Emulation.CPUs.CP1610
 		public int TotalExecutedCycles;
 		public int PendingCycles;
 
-		public Func<ushort, byte> ReadMemory;
-		public Action<ushort, byte> WriteMemory;
+		public Func<ushort, ushort> ReadMemory;
+		public Action<ushort, ushort> WriteMemory;
 	}
 }
diff --git a/BizHawk.Emulation/CPUs/CP1610/Disassembler.cs b/BizHawk.Emulation/CPUs/CP1610/Disassembler.cs
index 9cc05f3c7a..27f846a308 100644
--- a/BizHawk.Emulation/CPUs/CP1610/Disassembler.cs
+++ b/BizHawk.Emulation/CPUs/CP1610/Disassembler.cs
@@ -7,6 +7,8 @@ namespace BizHawk.Emulation.CPUs.CP1610
 {
 	public sealed partial class CP1610
 	{
+		public const string UNKNOWN = "???";
+
 		public string Disassemble(ushort pc, out int bytesToAdvance)
 		{
 			bytesToAdvance = 1;
@@ -47,7 +49,7 @@ namespace BizHawk.Emulation.CPUs.CP1610
 							break;
 						case 0x3:
 							// Unknown opcode.
-							break;
+							return UNKNOWN;
 					}
 					if (register != 0x3)
 						result += " R" + register + ",";
@@ -1178,7 +1180,7 @@ namespace BizHawk.Emulation.CPUs.CP1610
 				case 0x3FF:
 					throw new NotImplementedException();
 			}
-			return "???";
+			return UNKNOWN;
 		}
 	}
 }
diff --git a/BizHawk.Emulation/Consoles/Intellivision/MemoryMap.cs b/BizHawk.Emulation/Consoles/Intellivision/MemoryMap.cs
index cfda4b2d22..94591780bb 100644
--- a/BizHawk.Emulation/Consoles/Intellivision/MemoryMap.cs
+++ b/BizHawk.Emulation/Consoles/Intellivision/MemoryMap.cs
@@ -7,15 +7,15 @@ namespace BizHawk.Emulation.Consoles.Intellivision
 {
 	public sealed partial class Intellivision
 	{
-		private byte[] STIC_Registers;
-		private byte[] Scratchpad_RAM;
-		private byte[] PSG_Registers;
-		private byte[] System_RAM;
-		private byte[] Executive_ROM;
-		private byte[] Graphics_ROM;
-		private byte[] Graphics_RAM;
+		private ushort[] STIC_Registers;
+		private ushort[] Scratchpad_RAM;
+		private ushort[] PSG_Registers;
+		private ushort[] System_RAM;
+		private ushort[] Executive_ROM;
+		private ushort[] Graphics_ROM;
+		private ushort[] Graphics_RAM;
 
-		public byte ReadMemory(ushort addr)
+		public ushort ReadMemory(ushort addr)
 		{
 			switch (addr & 0xF000)
 			{
@@ -39,7 +39,7 @@ namespace BizHawk.Emulation.Consoles.Intellivision
 			throw new NotImplementedException();
 		}
 
-		public void WriteMemory(ushort addr, byte value)
+		public void WriteMemory(ushort addr, ushort value)
 		{
 			switch (addr & 0xF000)
 			{