Added support for OR r8, r/m8 instruction (opcode 0x0A) with tests

X86DisassemblerTests/OrInstructionTests.cs

@@ -0,0 +1,49 @@
+namespace X86DisassemblerTests;
+
+using System;
+using Xunit;
+using X86Disassembler.X86;
+
+/// <summary>
+/// Tests for OR instruction handlers
+/// </summary>
+public class OrInstructionTests
+{
+    /// <summary>
+    /// Tests the OR r8, r/m8 instruction (0x0A)
+    /// </summary>
+    [Fact]
+    public void TestOrR8Rm8()
+    {
+        // Arrange
+        byte[] code = { 0x0A, 0xC8 }; // OR CL, AL
+        
+        // Act
+        Disassembler disassembler = new Disassembler(code, 0x1000);
+        var instructions = disassembler.Disassemble();
+        
+        // Assert
+        Assert.Single(instructions);
+        Assert.Equal("or", instructions[0].Mnemonic);
+        Assert.Equal("cl, al", instructions[0].Operands);
+    }
+    
+    /// <summary>
+    /// Tests the OR r8, m8 instruction (0x0A) with memory operand
+    /// </summary>
+    [Fact]
+    public void TestOrR8M8()
+    {
+        // Arrange
+        byte[] code = { 0x0A, 0x00 }; // OR AL, BYTE PTR [EAX]
+        
+        // Act
+        Disassembler disassembler = new Disassembler(code, 0x1000);
+        var instructions = disassembler.Disassemble();
+        
+        // Assert
+        Assert.Single(instructions);
+        Assert.Equal("or", instructions[0].Mnemonic);
+        Assert.Equal("al, byte ptr [eax]", instructions[0].Operands);
+    }
+}