public Instruction(VirtualMachine virtualMachine)
{
machine = virtualMachine;
Left = new Operand(machine);
Right = new Operand(machine);
}
private static void Main(string[] args)
{
AppDomain.CurrentDomain.UnhandledException += (sender, e) => DumpError((Exception)e.ExceptionObject);
var speed = VmSpeed.Medium;
var running = true;
Config = ConfigFile.Load("VmConfig.xml");
TextDisplay.Initialize(CharWidth, CharHeight);
window = new RenderWindow(new VideoMode(200 * CharWidth, 81 * CharHeight), "", Styles.Close);
window.SetFramerateLimit(Config.Framerate);
window.Closed += (sender, e) => window.Close();
display = new TextDisplay(200, 80);
memory = new Memory();
machine = new VirtualMachine(memory);
statusDisplay = new TextDisplay(200, 1);
machine.AttachDevice(new Devices.Motherboard(machine, display));
var devMap = new Dictionary<string, Type>()
{
{ "Controller", typeof(Devices.Controller) },
{ "Keyboard", typeof(Devices.Keyboard) },
{ "HardDrive", typeof(Devices.HardDrive) },
{ "Speaker", typeof(Devices.Speaker) },
};
foreach (var devConfig in Config.Devices)
{
var devName = devConfig.Name.ToString();
if (!devMap.ContainsKey(devName))
continue;
var devEnabledAttr = devConfig.Attribute("Enabled");
var devEnabled = devEnabledAttr == null || devEnabledAttr.Value.ToLower() == "true";
if (!devEnabled)
continue;
var device = (Device)Activator.CreateInstance(devMap[devName], window, machine, devConfig);
machine.AttachDevice(device);
}
var file = Config.DefaultFile;
if (args.Length > 0)
file = args[0];
if (error == null)
Load(file);
window.KeyPressed += (sender, eventArgs) =>
{
if (eventArgs.Code == Config.Pause)
running = !running;
if (eventArgs.Code == Config.ChangeSpeed)
speed = (VmSpeed)(((int)speed + 1) % 4);
if (eventArgs.Code == Config.Reload)
Load(file);
};
var previousSteps = new LinkedList<int>();
var ipX = 0;
var ipY = 0;
var spX = 0;
var spY = 0;
while (window.IsOpen())
{
window.DispatchEvents();
#region Stepping
var requestedSteps = 0;
var steps = 0;
switch (speed)
{
case VmSpeed.Slow:
requestedSteps = Config.Slow;
break;
case VmSpeed.Medium:
requestedSteps = Config.Medium;
break;
case VmSpeed.Fast:
requestedSteps = Config.Fast;
break;
case VmSpeed.Unlimited:
requestedSteps = int.MaxValue; // "unlimited"
break;
}
if (running && error == null)
{
try
{
var stopwatch = Stopwatch.StartNew();
while (stopwatch.Elapsed.TotalSeconds < (0.95 / Config.Framerate))
{
if (steps >= requestedSteps)
break;
for (var i = 0; i < 100; i++, steps++)
{
machine.Step();
}
}
}
catch (VmException e)
{
error = e.Message;
}
}
previousSteps.AddLast(steps);
if (previousSteps.Count > Config.Framerate)
previousSteps.RemoveFirst();
#endregion
display.DrawImage(0, 0, memory);
#region IP and SP markers
display.Set(ipX, ipY, Character.Create(background: 0));
display.Set(spX, spY, Character.Create(background: 0));
var ip = machine.IP / 2;
ipX = ip % 200;
ipY = ip / 200;
var sp = machine.SP / 2;
spX = sp % 200;
spY = sp / 200;
if (ipY < 80)
display.Set(ipX, ipY, Character.Create(background: 255));
if (spY < 80)
display.Set(spX, spY, Character.Create(background: 255));
#endregion
var statusString = "Paused";
if (error != null)
statusString = string.Format("ERROR: {0}", error);
else if (machine.Flags.HasFlag(VirtualMachine.Flag.Trap))
statusString = "Trapped";
else if (running)
statusString = string.Format("Running: {0} instructions per second ({1})", previousSteps.Sum(), speed);
statusDisplay.Clear(Character.Create(' '));
statusDisplay.DrawText(0, 0, statusString, Character.Create(foreground: 255));
display.Draw(window, new Vector2f(0, 0));
statusDisplay.Draw(window, new Vector2f(0, 80 * CharHeight));
window.Display();
}
machine.Dispose();
}
public abstract void Attach(VirtualMachine machine);
public Operand(VirtualMachine machine)
{
this.machine = machine;
}