public void Cycle(Chip8Processor cpu, Chip8Memory[] ram, Chip8GPU gpu)
{
cpu.Opcode = (short)(ram[cpu.pc].value << 8 | ram[cpu.pc + 1].value);
char test = (char)(cpu.Opcode & 0xF000);
switch (cpu.Opcode & 0xF000)
{
case 0x0000: //call, disp_clear, return
if ((char)(cpu.Opcode >> 12 & 0x0) != 0x00) //call (0NNN)
{
}
else
{
if ((char)(cpu.Opcode & 0x000E) != 0x000E) //return (00EE)
{
}
else //disp_clear (00E0)
{
}
}
return;
case 0x1000: //goto NNN (1NNN)
cpu.pc = (ushort)(cpu.Opcode & 0x0FFF);
//TODO: make sure pc doesnt have to move 2 after this as well
//TODO: gotos and jumps suck make sure this emulates right once more of emu is working
return;
case 0x2000: //call subroutine
return;
case 0x3000: //skip next inst if Vx == xxNN
return;
case 0x4000: //skip next inst if Vx != xxNN
return;
case 0x6000: //set Vx to value NN
v[cpu.Opcode & 0x0F] = (char)(cpu.Opcode & 0x00FF);
cpu.pc += 2;
return;
case 0xA000: //set I to ANNN for address use
logging.Add(string.Format("Set I to {0}", (ushort)(cpu.Opcode & 0x0FFF)));
i = (ushort)(cpu.Opcode & 0x0FFF);
pc += 2;
return;
case 0xD000: //draw Vx, Vy, N (DXYN)
pc += 2;
return;
}
}
private void button1_Click(object sender, EventArgs e)
{
//load pong.rom
cpu = new Chip8Processor();
BinaryReader rom = new BinaryReader(File.OpenRead(@"C:\Users\Michael\source\repos\Chip8Emulator\pong.rom"));
ram = new Chip8Memory[4096];
for (int i = 0; i < ram.Length; i++)
{
ram[i] = new Chip8Memory();
}
cpu.LoadGameIntoRAM(rom, ram);
rom.Close();
//TODO: need to fill out static data like the font
gpu = new Chip8GPU();
input = new Chip8Input();
taskPause = false;
cpu.Initialize(cpu);
cycle = new Task(() => Cycle(cpu, ram));
Cycle(cpu, ram);
}
