diff --git a/source/Indy.IL2CPU.Tests/Assembler/X86/MoveTests.cs b/source/Indy.IL2CPU.Tests/Assembler/X86/MoveTests.cs
index 92b703a11..351c49e5b 100644
--- a/source/Indy.IL2CPU.Tests/Assembler/X86/MoveTests.cs
+++ b/source/Indy.IL2CPU.Tests/Assembler/X86/MoveTests.cs
@@ -59,5 +59,18 @@ namespace Indy.IL2CPU.Tests.Assembler.X86 {
             new Move { Size = 8, DestinationReg = Registers.EBP, DestinationIsIndirect = true, SourceValue = 72 };
             Verify();
         }
+
+        [Test]
+        public void TestImmediateToMemorySimple16() {
+            new Move { Size = 16, DestinationReg = Registers.EAX, DestinationIsIndirect = true, SourceValue = 65 };
+            new Move { Size = 16, DestinationReg = Registers.EBX, DestinationIsIndirect = true, SourceValue = 66 };
+            new Move { Size = 16, DestinationReg = Registers.ECX, DestinationIsIndirect = true, SourceValue = 67 };
+            new Move { Size = 16, DestinationReg = Registers.EDX, DestinationIsIndirect = true, SourceValue = 68 };
+            new Move { Size = 16, DestinationReg = Registers.EDI, DestinationIsIndirect = true, SourceValue = 69 };
+            new Move { Size = 16, DestinationReg = Registers.ESI, DestinationIsIndirect = true, SourceValue = 70 };
+            new Move { Size = 16, DestinationReg = Registers.ESP, DestinationIsIndirect = true, SourceValue = 71 };
+            new Move { Size = 16, DestinationReg = Registers.EBP, DestinationIsIndirect = true, SourceValue = 72 };
+            Verify();
+        }
     }
 }
\ No newline at end of file
diff --git a/source/Indy.IL2CPU.Tests/Assembler/X86/VerificationData/MoveTests/ImmediateToMemorySimple16.asm b/source/Indy.IL2CPU.Tests/Assembler/X86/VerificationData/MoveTests/ImmediateToMemorySimple16.asm
new file mode 100644
index 000000000..c6c8107a6
--- /dev/null
+++ b/source/Indy.IL2CPU.Tests/Assembler/X86/VerificationData/MoveTests/ImmediateToMemorySimple16.asm
@@ -0,0 +1,10 @@
+use32
+org 0x200000
+			mov word [EAX], 0x41
+			mov word [EBX], 0x42
+			mov word [ECX], 0x43
+			mov word [EDX], 0x44
+			mov word [EDI], 0x45
+			mov word [ESI], 0x46
+			mov word [ESP], 0x47
+			mov word [EBP], 0x48
diff --git a/source/Indy.IL2CPU.Tests/Assembler/X86/VerificationData/MoveTests/ImmediateToMemorySimple16.bin b/source/Indy.IL2CPU.Tests/Assembler/X86/VerificationData/MoveTests/ImmediateToMemorySimple16.bin
new file mode 100644
index 000000000..7ac358562
Binary files /dev/null and b/source/Indy.IL2CPU.Tests/Assembler/X86/VerificationData/MoveTests/ImmediateToMemorySimple16.bin differ
diff --git a/source/Indy.IL2CPU.Tests/Indy.IL2CPU.Tests.csproj b/source/Indy.IL2CPU.Tests/Indy.IL2CPU.Tests.csproj
index 6503c220a..feb44ca1c 100644
--- a/source/Indy.IL2CPU.Tests/Indy.IL2CPU.Tests.csproj
+++ b/source/Indy.IL2CPU.Tests/Indy.IL2CPU.Tests.csproj
@@ -79,6 +79,12 @@
   <ItemGroup>
     <EmbeddedResource Include="Assembler\X86\VerificationData\MoveTests\ImmediateToRegister8.asm" />
   </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="Assembler\X86\VerificationData\MoveTests\ImmediateToMemorySimple16.asm" />
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="Assembler\X86\VerificationData\MoveTests\ImmediateToMemorySimple16.bin" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/source/Indy.IL2CPU/Assembler/x86/Move.cs b/source/Indy.IL2CPU/Assembler/x86/Move.cs
index 79eb2360a..4f6469a04 100644
--- a/source/Indy.IL2CPU/Assembler/x86/Move.cs
+++ b/source/Indy.IL2CPU/Assembler/x86/Move.cs
@@ -18,26 +18,18 @@ namespace Indy.IL2CPU.Assembler.X86 {
                 DestinationRegByte = 0,
                 SourceImmediate = true
             });  // immediate to register
-            //aData.EncodingOptions.Add(new InstructionData.InstructionEncodingOption {
-            //    OpCode = new byte[] { 0xC6 },
-            //    //NeedsModRMByte=true,
-            //    //OperandSize=InstructionSize.Word,
-            //    AllowedSizes=InstructionSizes.Word,
-            //    OperandSizeByte = 0,
-            //    OperandSizeBitShiftLeft = 0,
-            //    SourceImmediate = true
-            //});  // immediate to memory
             aData.EncodingOptions.Add(new InstructionData.InstructionEncodingOption {
                 OpCode = new byte[] { 0xC6 },
-                NeedsModRMByte=true,
+                NeedsModRMByte = true,
                 AllowedSizes = InstructionSizes.Word,
                 OperandSizeByte = 0,
                 OperandSizeBitShiftLeft = 0,
                 SourceImmediate = true,
-                DestinationRegByte=1,
-                DestinationMemory = true
+                DestinationRegByte = 1,
+                DestinationMemory = true,
+                DestinationReg=Registers.ESP
+                
             });  // immediate to memory
-
         }
 	}
 }
diff --git a/source/Indy.IL2CPU/Assembler/x86/_Infra/Instruction.cs b/source/Indy.IL2CPU/Assembler/x86/_Infra/Instruction.cs
index 7790682b2..6754a0751 100644
--- a/source/Indy.IL2CPU/Assembler/x86/_Infra/Instruction.cs
+++ b/source/Indy.IL2CPU/Assembler/x86/_Infra/Instruction.cs
@@ -317,6 +317,9 @@ namespace Indy.IL2CPU.Assembler.X86 {
 
         private static byte[] GetData(Indy.IL2CPU.Assembler.Assembler aAssembler, InstructionWithDestinationAndSourceAndSize aInstruction, InstructionData aInstructionData) {
             var xEncodingOption = GetInstructionEncodingOption(aInstruction, aInstructionData);
+            if(aInstruction.ToString() == "mov word [ESP], 0x47") {
+             Console.Write("");   
+            }
             ulong xSize = 0;
             Instruction.DetermineSize(aInstruction, aInstructionData, out xSize);
             if(xSize==0) {
@@ -338,7 +341,7 @@ namespace Indy.IL2CPU.Assembler.X86 {
             Array.Copy(xEncodingOption.OpCode, 0, xBuffer, xExtraOffset, xEncodingOption.OpCode.Length);
             byte? xSIB = null;
             if (xEncodingOption.NeedsModRMByte) {
-                xBuffer[xEncodingOption.OpCode.Length] = EncodeModRMByte(aInstruction.DestinationReg, aInstruction.DestinationIsIndirect, aInstruction.DestinationDisplacement > 0, aInstruction.DestinationDisplacement > 255, out xSIB);
+                xBuffer[xEncodingOption.OpCode.Length + xExtraOffset] = EncodeModRMByte(aInstruction.DestinationReg, aInstruction.DestinationIsIndirect, aInstruction.DestinationDisplacement > 0, aInstruction.DestinationDisplacement > 255, out xSIB);
                 //byte 
                 // = EncodeModRMByte()
                 //if(aInstruction.DestinationReg != Guid.Empty && !aInstruction.DestinationIsIndirect) {
@@ -349,11 +352,11 @@ namespace Indy.IL2CPU.Assembler.X86 {
                 //}
                 // todo: add more ModRM stuff
             }
-            if (aInstruction.DestinationReg != Guid.Empty) {
+            if (aInstruction.DestinationReg != Guid.Empty && !xEncodingOption.NeedsModRMByte) {
                 xBuffer[xEncodingOption.DestinationRegByte + xExtraOffset] |= (byte)(EncodeRegister(aInstruction.DestinationReg) << xEncodingOption.DestinationRegBitShiftLeft);
             }
             if(xSIB!=null) {
-                xBuffer[xEncodingOption.OpCode.Length + 1] = xSIB.Value;
+                xBuffer[xEncodingOption.OpCode.Length + xExtraOffset + 1] = xSIB.Value;
                 xExtraOffset++;
             }
             // todo: add more options
@@ -366,7 +369,7 @@ namespace Indy.IL2CPU.Assembler.X86 {
             }
             if (xEncodingOption.OperandSizeByte.HasValue) {
                 if (aInstruction.Size > 8) {
-                    xBuffer[xEncodingOption.OperandSizeByte.Value + xExtraOffset] |= (byte)(1 << xEncodingOption.OperandSizeBitShiftLeft);
+                    xBuffer[xEncodingOption.OperandSizeByte.Value + xOpCodeOffset] |= (byte)(1 << xEncodingOption.OperandSizeBitShiftLeft);
                 }
             }
 
diff --git a/source/Playgrounds/Matthijs/TestApp/Program.cs b/source/Playgrounds/Matthijs/TestApp/Program.cs
index 10f6fda21..c200b5432 100644
--- a/source/Playgrounds/Matthijs/TestApp/Program.cs
+++ b/source/Playgrounds/Matthijs/TestApp/Program.cs
@@ -1,4 +1,4 @@
-//#define BINARY
+#define BINARY
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -12,14 +12,15 @@ namespace TestApp {
     class Program {
         class Renderer : Y86 {
             public void DoRender() {
-                new Move { DestinationReg = Registers.AL, SourceValue = 1 };
-                new Move { DestinationReg = Registers.BL, SourceValue = 2 };
-                new Move { DestinationReg = Registers.CL, SourceValue = 3 };
-                new Move { DestinationReg = Registers.DL, SourceValue = 4 };
-                new Move { DestinationReg = Registers.AH, SourceValue = 1 };
-                new Move { DestinationReg = Registers.BH, SourceValue = 2 };
-                new Move { DestinationReg = Registers.CH, SourceValue = 3 };
-                new Move { DestinationReg = Registers.DH, SourceValue = 4 };
+                new Move { Size = 8, DestinationReg = Registers.EAX, DestinationIsIndirect = true, SourceValue = 65 };
+                new Move { Size = 8, DestinationReg = Registers.EBX, DestinationIsIndirect = true, SourceValue = 66 };
+                new Move { Size = 8, DestinationReg = Registers.ECX, DestinationIsIndirect = true, SourceValue = 67 };
+                new Move { Size = 8, DestinationReg = Registers.EDX, DestinationIsIndirect = true, SourceValue = 68 };
+                new Move { Size = 8, DestinationReg = Registers.EDI, DestinationIsIndirect = true, SourceValue = 69 };
+                new Move { Size = 8, DestinationReg = Registers.ESI, DestinationIsIndirect = true, SourceValue = 70 };
+                new Move { Size = 8, DestinationReg = Registers.ESP, DestinationIsIndirect = true, SourceValue = 71 };
+                new Move { Size = 8, DestinationReg = Registers.EBP, DestinationIsIndirect = true, SourceValue = 72 };
+
             }
         }
         static void Main(string[] args) {