public void CanSetSpriteAtByteBorderBit()
{
var sprite = new byte[5];
sprite[0] = 0xff;
var display = new TestDisplay();
var cpu = new CPU(new Memory(), display, null);
cpu.SetSprite(8, 0, sprite, 1);
// 0 1 2 3
// 0000000011111110000000000000000
// 0x0 0xff 0x0 0x0
Assert.AreEqual(0xff, display.Screen[1]);
}
public void CanSetSprite1()
{
var sprite = new byte[5];
sprite[0] = 0x20;
sprite[1] = 0x60;
sprite[2] = 0x20;
sprite[3] = 0x20;
sprite[4] = 0x70;
var display = new TestDisplay();
var cpu = new CPU(new Memory(), display, null);
cpu.SetSprite(4, 4, sprite, 5);
display.Print();
}
public void CanDetectCollisions()
{
var sprite = new byte[1];
sprite[0] = 0x20; // 00100000 lsb = 00000100 msb
var display = new TestDisplay();
display.Screen[0] = 0x4; // 00100000 lsb
var memory = new Memory();
memory.LoadAt(sprite, 0x300);
var cpu = new CPU(memory, display, new Keyboard());
cpu.Register[0] = 0;
cpu.Register[1] = 0;
cpu.AddressRegister = 0x300;
cpu.ProcessInstruction(0xd011);
Assert.AreEqual(1, cpu.Register[0xf]);
}
public void Run(string programpath)
{
var display = new ConsoleDisplay();
var keyboard = new ConsoleKeyboard();
memory = new Memory();
cpu = new CPU(memory, display, keyboard);
disassembler = new Disassembler();
// Load ROM
var romfile = File.OpenRead("ROM.bin");
var rom = new byte[512];
romfile.Read(rom, 0, 512);
romfile.Close();
memory.InitializeROM(rom);
// Load Program
var programfile = File.OpenRead(programpath);
var program = new byte[3584];
programfile.Read(program, 0, 3584);
memory.LoadProgram(program);
// Start clock
Stopwatch sw = new Stopwatch();
var cpuspeed = 6 * Stopwatch.Frequency / 1000;
while (true){
var debug = keyboard.CheckKeys();
if (debug){
StartDebugging();
debug = false;
continue;
}
if(!sw.IsRunning || sw.ElapsedTicks > cpuspeed) {
cpu.Clock();
sw.Restart();
}
}
}
public void CanSetSpriteAtOddBit()
{
var sprite = new byte[5];
sprite[0] = 0xff;
var display = new TestDisplay();
var cpu = new CPU(new Memory(), display, null);
cpu.SetSprite(10, 0, sprite, 1);
display.Print();
// 0 1 2 3
// 0000000000111111100000000000000
// 0000000011111110000000011000000 msb -> lsb
// 0x0 0x3f 0xc0 0x0
Assert.AreEqual(0xfc, display.Screen[1]);
Assert.AreEqual(0x03, display.Screen[2]);
}
public void CanWrapSpriteAtY()
{
var sprite = new byte[5];
sprite[0] = 0xff;
sprite[1] = 0xff;
var display = new TestDisplay();
var cpu = new CPU(new Memory(), display, null);
cpu.SetSprite(0, 31, sprite, 2);
Assert.AreEqual(0xff, display.Screen[31*8]);
Assert.AreEqual(0xff, display.Screen[0]);
}
public void CanWrapSpriteAtX()
{
var sprite = new byte[5];
sprite[0] = 0xff;
var display = new TestDisplay();
var cpu = new CPU(new Memory(), display, null);
cpu.SetSprite(62, 0, sprite, 1);
// 62 63 |64 65
// 11111100 00000000 |00000000 00000011
// 00111111 00000000 |00000000 11000000 lsb
// 0xfc 0x0 0x0 0x3
display.Print();
Assert.AreEqual(0xc0, display.Screen[7]);
Assert.AreEqual(0x3f, display.Screen[0]);
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Chip8Android.Resource.Layout.Main);
SetClickHandler(Resource.Id.button0);
SetClickHandler(Resource.Id.button1);
SetClickHandler(Resource.Id.button2);
SetClickHandler(Resource.Id.button3);
SetClickHandler(Resource.Id.button4);
SetClickHandler(Resource.Id.button5);
SetClickHandler(Resource.Id.button6);
SetClickHandler(Resource.Id.button7);
SetClickHandler(Resource.Id.button8);
SetClickHandler(Resource.Id.button9);
SetClickHandler(Resource.Id.buttonA);
SetClickHandler(Resource.Id.buttonB);
SetClickHandler(Resource.Id.buttonC);
SetClickHandler(Resource.Id.buttonD);
SetClickHandler(Resource.Id.buttonE);
SetClickHandler(Resource.Id.buttonF);
Chip8View view = (Chip8View)FindViewById(Resource.Id.chip8view);
var memory = new Memory();
memory.InitializeInterpreterBuffer();
int appno = 2;
var apps = new string[]{
"IBM Logo.ch8",
"Brix.ch8",
"Keypad Test.ch8",
"Trip8 Demo.ch8"
};
var stream = Assets.Open(apps[appno]);
byte[] buffer = new byte[3584];
stream.Read(buffer, 0, 3584);
memory.LoadProgram(buffer);
keyboard = new KeyboardHandler();
var chip8 = new CPU(memory, view, keyboard);
timer = new System.Timers.Timer(1);
timer.Elapsed += (sender, e) => chip8.Clock();
timer.Enabled = true;
// GridView view = (GridView)FindViewById(Resource.Id.gridview);
// view.Adapter = new ImageAdapter(this.BaseContext);
}