private void OpenROM(object sender, EventArgs e)
{
// Show the dialog and get result.
DialogResult result = openFileDialog1.ShowDialog();
if (result == DialogResult.OK) // Test result.
{
string path = openFileDialog1.FileName;
rom ROM = new rom();
cpu CPU = new cpu();
ram RAM = new ram();
byte[] ROMByte = File.ReadAllBytes(path);
int num1 = 0x8000;
int num2 = 0xc000;
ROM.Init(ROMByte, RAM);
RAM.Init();
Buffer.BlockCopy(ROM.ROMBytes, 0x10, RAM.Memory, num1, 0x4000);
if (ROM.NumOfPRGBlocks == 1)
{
Buffer.BlockCopy(ROM.ROMBytes, 0x10, RAM.Memory, num2, 0x4000);
}
Debug.WriteLine(RAM.Memory[0x8000]);
Debug.WriteLine(RAM.Memory[0xC5F5]);
CPU.PowerUp();
CPU.RunROM(ROM, RAM);
}
Console.WriteLine(result); // <-- For debugging use.
}
public void Init(byte[] ROMData, ram RAMvar)
{
RAM = RAMvar;
NumOfPRGBlocks = ROMData[4];
NumOfCHRBlocks = ROMData[5];
ROMBytes = ROMData;
PRGBytes = ROMData.Skip(16).Take(KBSize * NumOfPRGBlocks).ToArray();
}
public MainForm()
{
Debug.WriteLine("hello world");
//
// The InitializeComponent() call is required for Windows Forms designer support.
//
InitializeComponent();
//
// TODO: Add constructor code after the InitializeComponent() call.
//
//TODO: Unhardcode path.
//string path = @"C:\Users\510628\Desktop\SharpDevelop\Projects\NesCom\ROms\Earthbound_Zero_(P)_(H).nes";
//string path = @"C:\Users\510628\Desktop\SharpDevelop\Projects\NesCom\ROms\Super Mario Bros (E).nes";
//string path = @"C:\Users\510628\Desktop\SharpDevelop\Projects\NesCom\ROms\sample.nes";
string path = @"C:\Users\510628\Desktop\SharpDevelop\Projects\NesCom\ROms\nestest.nes";
rom ROM = new rom();
cpu CPU = new cpu();
ram RAM = new ram();
byte[] ROMByte = File.ReadAllBytes(path);
int num1 = 0x8000;
int num2 = 0xc000;
ROM.Init(ROMByte, RAM);
RAM.Init();
Buffer.BlockCopy(ROM.ROMBytes, 0x10, RAM.Memory, num1, 0x4000);
if (ROM.NumOfPRGBlocks == 1)
{
Buffer.BlockCopy(ROM.ROMBytes, 0x10, RAM.Memory, num2, 0x4000);
}
Debug.WriteLine(RAM.Memory[0x8000]);
Debug.WriteLine(RAM.Memory[0xC5F5]);
CPU.PowerUp();
CPU.RunROM(ROM, RAM);
}
public void RunROM(rom SelfROM, ram SelfRAM)
{
//Load ROM
ROM = SelfROM;
RAM = SelfRAM;
PC_Register = 0x8000;
//Run ROM
IsRunning = true;
byte CurrentByte;
while (IsRunning)
{
//Get byte at Program Counter
CurrentByte = ROM.GetByte(PC_Register);
//Turn Byte into Instruction
switch (CurrentByte)
{
case 0x0:
BRKInstruction(CurrentByte);
break;
case 0x10:
BPLInstruction(CurrentByte);
break;
case 0x18:
CLCInstruction(CurrentByte);
break;
case 0x20:
JSRInstruction(CurrentByte);
break;
case 0x24:
BITZePgInstruction(CurrentByte);
break;
case 0x30:
BMIInstruction(CurrentByte);
break;
case 0x38:
SECInstruction(CurrentByte);
break;
case 0x45:
EORZePgInstruction(CurrentByte);
break;
case 0x4C:
JMPAbsInstruction(CurrentByte);
break;
case 0x50:
BVCInstruction(CurrentByte);
break;
case 0x58:
CLIInstruction(CurrentByte);
break;
case 0x60:
RTSInstruction(CurrentByte);
break;
case 0x69:
ADCImmInstruction(CurrentByte);
break;
case 0x70:
BVSInstruction(CurrentByte);
break;
case 0x78:
SEIInstruction(CurrentByte);
break;
case 0x85:
StaZePgInstruction(CurrentByte);
break;
case 0x86:
StxZePgInstruction(CurrentByte);
break;
case 0x8D:
StaAbsInstruction(CurrentByte);
break;
case 0x8E:
StxAbsInstruction(CurrentByte);
break;
case 0x90:
BCCInstruction(CurrentByte);
break;
case 0x9A:
TXSInstruction(CurrentByte);
break;
case 0xA0:
LDYImmInstruction(CurrentByte);
break;
case 0xA2:
LDXImmInstruction(CurrentByte);
break;
case 0xA5:
LdaZePgInstruction(CurrentByte);
break;
case 0xA9:
LDAImmInstruction(CurrentByte);
break;
case 0xAA:
TAXInstruction(CurrentByte);
break;
case 0xAD:
LdaAbsInstruction(CurrentByte);
break;
case 0xB0:
BCSInstruction(CurrentByte);
break;
case 0xB8:
CLVInstruction(CurrentByte);
break;
case 0xBD:
LdaAbsXInstruction(CurrentByte);
break;
case 0xC0:
CPYImmInstruction(CurrentByte);
break;
case 0xC9:
CMPImmInstruction(CurrentByte);
break;
case 0xCA:
DEXInstruction(CurrentByte);
break;
case 0xE0:
CPXImmInstruction(CurrentByte);
break;
case 0xEA:
NOPInstruction(CurrentByte);
break;
case 0xED:
INXInstruction(CurrentByte);
break;
case 0xD0:
BNEInstruction(CurrentByte);
break;
case 0xD8:
CLDInstruction(CurrentByte);
break;
case 0xF0:
BEQInstruction(CurrentByte);
break;
case 0xF8:
SEDInstruction(CurrentByte);
break;
default:
Debug.WriteLine("OpCode not implemented!!!");
throw new NotImplementedException("OpCode not implemented!!!");
}
PC_Register += InstructionLength;
Debug.WriteLine("PC Register: " + PC_Register.ToString("X"));
}
}
