Re-enabled exit (doesn't work), renamed the tests stage to "Kernel", moved the boot message to Cosmos.Kernel.Stages.Kernel, made a fail (unhandled exception) command, Made the RSOD (again).

source/Cosmos/Cosmos.Hardware/Old/Screen/Text.cs

@@ -10,7 +10,7 @@ namespace Cosmos.Hardware.Screen {
 		private static byte Color = 7;
 
 		public static unsafe void Clear() {
-			for (int i = 0; i < Columns * Lines; i++) {
+			for (int i = 0; i < Columns * (Lines + 1); i++) {
 				byte* xScreenPtr = (byte*)VideoAddr;
 				xScreenPtr += i*2;
 				*xScreenPtr = 0;

source/Cosmos/Cosmos.Kernel/Cosmos.Kernel.csproj

@@ -82,7 +82,7 @@
     <Compile Include="Old\Staging\DefaultStageQueue.cs" />
     <Compile Include="Old\Staging\IStage.cs" />
     <Compile Include="Old\Staging\StageQueue.cs" />
-    <Compile Include="Old\Staging\Stages\TestStage.cs" />
+    <Compile Include="Old\Staging\Stages\KernelStage.cs" />
     <Compile Include="StringFuncs.cs" />
     <Compile Include="Temp\Kudzu\PCI.cs" />
   </ItemGroup>

source/Cosmos/Cosmos.Kernel/Old/Staging/DefaultStageQueue.cs

@@ -7,7 +7,7 @@ namespace Cosmos.Kernel.Staging {
 	public class DefaultStageQueue : StageQueue {
 		public DefaultStageQueue()
 			: base () {
-			Enqueue (new Cosmos.Kernel.Staging.Stages.TestStage ());
+			Enqueue (new Cosmos.Kernel.Staging.Stages.KernelStage ());
 		}
 	}
 }

source/Cosmos/Cosmos.Kernel/Old/Staging/Stages/KernelStage.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Cosmos.Kernel.Staging.Stages {
+        public class KernelStage : StageBase {
+                #region IStage Members
+
+                public override string Name {
+                        get {
+                                return "Kernel";
+                        }
+                }
+
+				public override void Initialize() {
+                    System.Console.Clear();
+                    System.Console.BackgroundColor = ConsoleColor.Black;
+                    System.Console.ForegroundColor = ConsoleColor.Red;
+                    System.Console.WriteLine("Cosmos Kernel. Copyright 2007-2008 The Cosmos Project.");
+                    System.Console.WriteLine("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
+                    System.Console.ForegroundColor = ConsoleColor.White;
+                }
+
+                public override void Teardown() {
+                }
+
+                #endregion
+        }
+}

source/Cosmos/Cosmos.Kernel/Old/Staging/Stages/TestStage.cs

@@ -1,24 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace Cosmos.Kernel.Staging.Stages {
-        public class TestStage : StageBase {
-                #region IStage Members
-
-                public override string Name {
-                        get {
-                                return "Tests";
-                        }
-                }
-
-				public override void Initialize() {
-
-                }
-
-                public override void Teardown() {
-                }
-
-                #endregion
-        }
-}

source/Cosmos/Cosmos.Shell.Console/Commands/ExitCommand.cs

@@ -27,8 +27,7 @@ namespace Cosmos.Shell.Console.Commands
 
         public override void Execute(string param)
         {
-            //throw new NotSupportedException();
+            _exit();
-            //_exit();
         }
 
         public override void Help()

source/Cosmos/Cosmos.Shell.Console/Commands/FailCommand.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Cosmos.Shell.Console.Commands
+{
+    public class FailCommand : CommandBase
+    {
+        public override string Name
+        {
+            get { return "fail"; }
+        }
+
+        public override string Summary
+        {
+            get { return "Causes a kernel-level exception (RSOD)."; }
+        }
+
+        public override void Execute(string param)
+        {
+            throw new Exception("This is a test.");
+        }
+
+        public override void Help()
+        {
+            System.Console.WriteLine("fail");
+            System.Console.WriteLine(" Causes a kernel-level exception (RSOD).");
+        }
+    }
+}

source/Cosmos/Cosmos.Shell.Console/Cosmos.Shell.Console.csproj

@@ -49,6 +49,7 @@
     <Compile Include="Commands\DirCommand.cs" />
     <Compile Include="Commands\EchoCommand.cs" />
     <Compile Include="Commands\ExitCommand.cs" />
+    <Compile Include="Commands\FailCommand.cs" />
     <Compile Include="Commands\GuessCommand.cs" />
     <Compile Include="Commands\HelpCommand.cs" />
     <Compile Include="Commands\MatthijsCommand.cs" />
@@ -70,6 +71,10 @@
       <Project>{EF1F8912-AE8D-40B3-9857-5A2852986710}</Project>
       <Name>Cosmos.Build.Windows</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\Cosmos.Hardware.PC\Cosmos.Hardware.PC.csproj">
+      <Project>{B024FADF-EF04-4602-A0F4-49016D68B2AF}</Project>
+      <Name>Cosmos.Hardware.PC</Name>
+    </ProjectReference>
     <ProjectReference Include="..\Cosmos.Hardware\Cosmos.Hardware.csproj">
       <Project>{CE50FE98-9AC4-4B4D-ADC7-31F6DCD28755}</Project>
       <Name>Cosmos.Hardware</Name>

source/Cosmos/Cosmos.Shell.Console/Program.cs

@@ -23,21 +23,11 @@ namespace Cosmos.Shell.Console {
 			Kernel.Staging.DefaultStageQueue stages = new Cosmos.Kernel.Staging.DefaultStageQueue();
 			stages.Enqueue(new Prompter());
 
-			System.Console.Clear();
-			System.Console.BackgroundColor = ConsoleColor.Black;
-			System.Console.ForegroundColor = ConsoleColor.Red;
-			System.Console.WriteLine("Cosmos Kernel. Copyright 2007-2008 The Cosmos Project.");
-			System.Console.WriteLine("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
-			System.Console.ForegroundColor = ConsoleColor.Green;
-			System.Console.WriteLine("Now Booting...");
-
-			System.Console.ForegroundColor = ConsoleColor.White;
-			System.Console.WriteLine("Success.");
-			System.Console.WriteLine(Kernel.StringFuncs.TimeString());
 			stages.Run();
-			System.Console.WriteLine("Done");
-
 			stages.Teardown();
+
+            // Halt system.
+            while (true) ;
 		}
 	}
 }

source/Cosmos/Cosmos.Shell.Console/Prompter.cs

@@ -27,7 +27,8 @@ namespace Cosmos.Shell.Console {
 			_commands.Add(new Commands.ClsCommand());
 			_commands.Add(new Commands.DirCommand());
 			_commands.Add(new Commands.EchoCommand());
-			//_commands.Add(new Commands.ExitCommand(Stop)); // TODO: Fix this.
+			_commands.Add(new Commands.ExitCommand(Stop)); // TODO: Fix this.
+            _commands.Add(new Commands.FailCommand());
 			_commands.Add(new Commands.GuessCommand());
 			_commands.Add(new Commands.HelpCommand(_commands));
 			_commands.Add(new Commands.TestsCommand());

source/Cosmos/Cosmos.Shell.Console/Tests/StringTest.cs

@@ -29,6 +29,11 @@ namespace Cosmos.Shell.Console.Tests
             Assert("0123456789"[5] == '5', "\"0123456789\"[5] == '5'");
             Assert("a" != "b", "\"a\" != \"b\"");
             Assert('a'.ToString() == "a", "'a'.ToString() == \"a\"");
+
+            Assert(("a" + "b") == "ab", "\"a\" + \"b\" == \"a\" + \"b\"");
+            StringBuilder builder = new StringBuilder("a");
+            builder.Append("b");
+            Assert(builder.ToString() == "ab", "(stringbuilder)");
         }
     }
 }

source/Indy.IL2CPU.Assembler/Assembler.cs

@@ -11,37 +11,18 @@ namespace Indy.IL2CPU.Assembler {
 		//public const string CurrentExceptionDataMember = "__CURRENT_EXCEPTION__";
 		public static Exception CurrentException;
 		public static void PrintException() {
-			Console.BackgroundColor = ConsoleColor.Blue;
+			Console.BackgroundColor = ConsoleColor.DarkRed;
-			Console.ForegroundColor = ConsoleColor.White;
+			Console.ForegroundColor = ConsoleColor.Yellow;
-			string xClearLine = new String(' ', Console.WindowWidth);
+            Console.Clear();
-			for (int i = 0; i < Console.WindowHeight; i++) {
+
-				Console.Write("                                                                                ");
+			Console.WriteLine("Cosmos Kernel. Copyright 2008 The Cosmos Project.");
-			}
+			Console.WriteLine("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
-			//Console.Clear();
-			System.Console.WriteLine("Cosmos Kernel. Copyright 2008 The Cosmos Project.");
-			System.Console.WriteLine("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
 			Console.WriteLine("");
+			Console.WriteLine("An unhandled kernel exception occurred.");
 			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("BSOD's Rule!");
-			Console.WriteLine("");
-			Console.Write("Unhandled error occurred: ");
-			System.Diagnostics.Debugger.Break();
             Console.WriteLine(CurrentException.ToString());
 			Console.WriteLine("");
-			Console.WriteLine("");
+			Console.WriteLine("The Cosmos Project would appreciate your feedback about this issue.");
-			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("");
-			Console.WriteLine("");
 		}
 
 		private static FieldDefinition mCurrentExceptionRef;