public CPU(string romPath)
{
memory = new Memory(romPath);
OpcodeTable.GenerateOpcodeTable();
opcodeTable = OpcodeTable.OPCODE_TABLE;
// Test
//A = 0x11;
memory[0xFF44] = 0x91;
}
public void Tick()
{
if (!opcode.MoveNext())
{
if (OpcodeTable.ContainsKey(memory[reg.PC]))
{
opcode = OpcodeTable.Call(memory[reg.PC], memory, reg);
// Fetch takes 1 cycle
Debug.Log("\n{0:X2} - ", reg);
}
else
{
Console.Write("\nUnknown Opcode: {0:X2} at {1:X4}", memory[reg.PC], reg.PC);
Console.Write(" - {0}", reg);
alive = false;
}
}
}
public CPU(string romPath, string savePath)
{
memory = new Memory(romPath);
OpcodeTable.GenerateOpcodeTable();
opcodeTable = OpcodeTable.OPCODE_TABLE;
Debug.Log("\nLoading save state from file...");
byte[] stateDump = File.ReadAllBytes(savePath);
int lenCpuState = 2 + 2 + 1 + reg.Length;
PC = stateDump[0] | (stateDump[1] << 8);
SP = stateDump[2] | (stateDump[3] << 8);
interrupts = (stateDump[4] & 0x1) == 0x1;
toggleInterrupts = (stateDump[4] & 0x2) == 0x2;
Debug.Log("\nLoading register values from state dump...");
Array.Copy(stateDump, 5, reg, 0, reg.Length);
Debug.Log("\nCreating new array with ram dump data...");
byte[] ramDump = new byte[stateDump.Length - lenCpuState];
Array.Copy(stateDump, lenCpuState, ramDump, 0, ramDump.Length);
Debug.Log("\nPassing ram dump to memory class...");
memory.loadRAM(ramDump);
}
