protected override void Initialize()
{
this.IsMouseVisible = true;
this.IsFixedTimeStep = true;
this.TargetElapsedTime = new TimeSpan(4000); // only if IsFixedTimeStep is true
bool testROM = true;
if (testROM)
{
CPU.instructionFecther.LoadSourceFile(@".\ROM\SpaceInvaders1978\TEST-ROM2.json", SourceFileFormat.JSON_HEX);
}
else
{
CPU.instructionFecther.LoadSourceFile(@".\ROM\SpaceInvaders1978\INVADERS-H.json", SourceFileFormat.JSON_HEX);
//Debug.Write("Next file2\n");
CPU.instructionFecther.LoadSourceFile(@".\ROM\SpaceInvaders1978\INVADERS-G.json", SourceFileFormat.JSON_HEX);
//Debug.Write("Next file3\n");
CPU.instructionFecther.LoadSourceFile(@".\ROM\SpaceInvaders1978\INVADERS-f.json", SourceFileFormat.JSON_HEX);
//Debug.Write("Next file4\n");
CPU.instructionFecther.LoadSourceFile(@".\ROM\SpaceInvaders1978\INVADERS-E.json", SourceFileFormat.JSON_HEX);
CPU.instructionFecther.ParseCurrentContent();
}
List <string> spaceInvadersAsm = new List <string>();
string SpaceInvadersAsmPath = @"..\..\..\..\Misc\OutputFiles\SpaceInvaders.8080asm";
if (File.Exists(SpaceInvadersAsmPath))
{
File.Delete(SpaceInvadersAsmPath);
}
File.WriteAllLines(SpaceInvadersAsmPath, CPU.instructionFecther.FetchAllCodeLines());
Memory.RAM2File(); //NO WRITING FOR THE TIME BEING
Memory.RAM2FileHTML();
int memoryPointer = 0;
foreach (byte _byte in CPU.instructionFecther.FetchAllCodeBytes())
{
Memory.RAMMemory[memoryPointer] = _byte;
memoryPointer++;
Memory.TextSectionSize++;
}
//CPU.instructionFecther.ResetInstructionIterator(); //this is overly complicated, better get it from RAM
DisplayBuffer.Init(GraphicsDevice, Color.Black, Color.White);
DisplayBuffer.GenerateDisplay(); //Inverted colours. This is bad test, first frame will come emtpy always
DisplayBuffer.GenerateRAMDisplay();
screenBitmap = DisplayBuffer.videoTexture; // First screencap
RAMBitmap = DisplayBuffer.RAMtexture; // First screencap
base.Initialize();
}
protected override void Draw(GameTime gameTime)
{
//Update VideoBuffer
DisplayBuffer.GenerateDisplay();
screenBitmap = DisplayBuffer.videoTexture;
GraphicsDevice.Clear(Color.CornflowerBlue);
spriteBatch.Begin();
// GUI elements
spriteBatch.Draw(oneCycle, positionOneCycleButton, Color.White);
spriteBatch.Draw(loopCycles, new Rectangle(280, 10, 80, 50), Color.White);
spriteBatch.Draw(RAMMeter, new Rectangle(20, 475, 800, 50), Color.White);
spriteBatch.DrawString(font, "Step ONE Instruction Cycle automatically", new Vector2(10, 70), Color.Black);
// PC, cycles and next instruction
spriteBatch.DrawString(font, "ProgramCounter(PC): $" + CPU.programCounter.ToString("X4") + " (Memory address of current instruction)", new Vector2(10, 100), Color.Black);
spriteBatch.DrawString(font, "StackPointer(SP): $" + CPU.stackPointer.ToString("X4") + " (Memory address of stack pointer)", new Vector2(10, 120), Color.Black);
spriteBatch.DrawString(font, "Cycle: " + CPU.cyclesCounter.ToString(), new Vector2(10, 140), Color.Black);
spriteBatch.DrawString(font, "Last executed CPU instruction:\n" + CPU.InstructionExecuting, new Vector2(10, 160), Color.Black);
// CPU Registers
string registers = "REGISTERS"
+ "\nA: " + BitConverter.ToString(new byte[] { CPU.registerA })
+ "\nB: " + BitConverter.ToString(new byte[] { CPU.registerB })
+ "\nC: " + BitConverter.ToString(new byte[] { CPU.registerC })
+ "\nD: " + BitConverter.ToString(new byte[] { CPU.registerD })
+ "\nE: " + BitConverter.ToString(new byte[] { CPU.registerE })
+ "\nH: " + BitConverter.ToString(new byte[] { CPU.registerH })
+ "\nL: " + BitConverter.ToString(new byte[] { CPU.registerL });
spriteBatch.DrawString(font, registers, new Vector2(10, 240), Color.Black);
string flags = "FLAGS"
+ "\nZERO: " + CPU.ZeroFlag.ToString()
+ "\nSIGN: " + CPU.SignFlag.ToString()
+ "\nPARITY: " + CPU.ParityFlag.ToString()
+ "\nCARRY: " + CPU.CarryFlag.ToString()
+ "\nAUX. CARRY: " + CPU.AuxCarryFlag.ToString();
spriteBatch.DrawString(font, flags, new Vector2(120, 240), Color.Black);
// Cycles per second
spriteBatch.DrawString(font, "Cyles per second: " + CPU.CPS, new Vector2(140, 400), Color.Black);
spriteBatch.DrawString(font, "Subroutine: " + CPU.comment, new Vector2(140, 420), Color.Black);
// Display!!
spriteBatch.Draw(screenBitmap, pos, null, Color.White, RotationAngle, origin, 1.0f, SpriteEffects.None, 0f);
//Display RAM
spriteBatch.Draw(RAMBitmap, posRAM, null, Color.White, rotationAngleRAM, origin, 1.0f, SpriteEffects.None, 0f);
spriteBatch.End();
base.Draw(gameTime);
}