diff --git a/source/Indy.IL2CPU/Assembler/x86/ShiftLeft.cs b/source/Indy.IL2CPU/Assembler/x86/ShiftLeft.cs
index ff343ef78..8c39ce48f 100644
--- a/source/Indy.IL2CPU/Assembler/x86/ShiftLeft.cs
+++ b/source/Indy.IL2CPU/Assembler/x86/ShiftLeft.cs
@@ -12,9 +12,10 @@ namespace Indy.IL2CPU.Assembler.X86 {
                 NeedsModRMByte=true,
                 InitialModRMByteValue = 0xE0,
                 OperandSizeByte=0,
-                //ReverseRegisters = true,
+                ReverseRegisters = true,
                 DestinationReg=Guid.Empty,
-                SourceReg=Registers.CL
+                SourceReg=Registers.CL,
+                SourceRegByte=-1
             }); // register by CL
             aData.EncodingOptions.Add(new InstructionData.InstructionEncodingOption {
                 OpCode = new byte[] { 0xD2 },
diff --git a/source/Playgrounds/Matthijs/TestApp/Program.cs b/source/Playgrounds/Matthijs/TestApp/Program.cs
index 5e49e6988..2cf1b2d0b 100644
--- a/source/Playgrounds/Matthijs/TestApp/Program.cs
+++ b/source/Playgrounds/Matthijs/TestApp/Program.cs
@@ -12,15 +12,14 @@ namespace TestApp {
     class Program {
         class Renderer : Y86 {
             public void DoRender() {
-                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceValue = 30, DestinationValue = 65, DestinationIsIndirect = true, Size = 8 };
-                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceValue = 30, DestinationValue = 650, DestinationIsIndirect = true, Size = 8 };
-                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceValue = 30, DestinationValue = 650000, DestinationIsIndirect = true, Size = 8 };
-                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceValue = 300, DestinationValue = 65, DestinationIsIndirect = true, Size = 8 };
-                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceValue = 300, DestinationValue = 650, DestinationIsIndirect = true, Size = 8 };
-                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceValue = 300, DestinationValue = 650000, DestinationIsIndirect = true, Size = 8 };
-                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceValue = 300000, DestinationValue = 65, DestinationIsIndirect = true, Size = 8 };
-                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceValue = 300000, DestinationValue = 650, DestinationIsIndirect = true, Size = 8 };
-                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceValue = 300000, DestinationValue = 650000, DestinationIsIndirect = true, Size = 8 };
+                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceReg = Registers.CL, DestinationReg = Registers.AH, Size = 8 };
+                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceReg = Registers.CL, DestinationReg = Registers.AL, Size = 8 };
+                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceReg = Registers.CL, DestinationReg = Registers.BH, Size = 8 };
+                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceReg = Registers.CL, DestinationReg = Registers.BL, Size = 8 };
+                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceReg = Registers.CL, DestinationReg = Registers.CH, Size = 8 };
+                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceReg = Registers.CL, DestinationReg = Registers.CL, Size = 8 };
+                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceReg = Registers.CL, DestinationReg = Registers.DH, Size = 8 };
+                new global::Indy.IL2CPU.Assembler.X86.ShiftLeft { SourceReg = Registers.CL, DestinationReg = Registers.DL, Size = 8 };
             }
         }
         static void Main(string[] args) {