ChipAte Emulation

I am writing my first wmulator and since there arent many good tutorials out there... I want to make sure Im on the right track.

My first question...

Is this the proper way of emulatiing the CPU?

Code:

---

void CpuEmulation()
{
  OpCode = (Memory[PC] << 8) + Memory[PC + 1];

  switch(OpCode&0xF000)
  {
    case 0x0000:
      if(OpCode&0x00F0 == 0xE)
        ClearScreen();
      PC+=2;
    break;

    case 0x1000:
      MemoryPosition = OpCode&0x0FFF;
      PC+=2;
    break;

    case 0x3000:
      if(V[OpCode&0x0F00] == OpCode&0x00FF) PC += 4;
      else PC += 2;
    break;

    case 0x5000:
      if(V[OpCode&0x0F00] == OpCode&0x00F0) PC += 4;
      else PC += 2;
    break;

    case 0x6000:
      V[OpCode&0x0F00] = OpCode&0x00FF;
      PC+=2;
    break;

    case 0x7000:
      V[OpCode&0x0F00] += OpCode&0x00FF;
      PC+=2;
    break;

    case 0x8000:
      if(OpCode&0x000F == 0)
        V[OpCode&0x0F00] = V[OpCode&0x00F0];
      PC+=2;
    break;

    case 0xB000:
      MemoryPosition = OpCode&0x0FFF + V[0];
      PC+=2;
    break;
  }
}

---

You mean other than the fact that you're using globals everywhere?

Quzah.

I take it, thats a bad thing....

Look, this is the first time ive tried to program anything other than a game. I am just trying to figure out if Im doing this the right way, or if there is a better way. I was thinking I might have to shift some more bits or something :p

I am going to attach my source code and see if any one can give me some pointers. Not to tell me how stupid I am for doing something, just to kindly give me advice. :rolleyes:

Working from a decnet set of examples might be a good thing to try.

http://koti.mbnet.fi/~atjs/mc6809/

whether you are close to writing it correctly or not its still a damn good attempt.
im sure i saw a whole lot of emulator dev tutorials somewhere...

I have managed to load a rom and it actually draws a few thing on the screen. I found a really good explanation of all the Instructions of the chip8, but I cant figure out how to implement the 'I' address register... :confused:

Out of curiosity, I looked up chip-8 and found alot of info on this forum.

gg