public static StoredInstruction DeepCopy(StoredInstruction instruction)
{
return(new StoredInstruction(instruction.Name, instruction.OpCode, instruction.OperandLength, null)
{
Operand = instruction.Operand,
PC = instruction.PC,
extendedInstruction = instruction.extendedInstruction
});
}
// We are about to step
public void OnPreBreakpointStep()
{
// Pop the current instruction and store it in our history
executionHistory.Enqueue(StoredInstruction.DeepCopy(NextInstructions[0]));
NextInstructions.RemoveAt(0);
// Only show last x instructions
if (executionHistory.Count == Instruction_Depth)
{
executionHistory.Dequeue();
}
}
public void PeekSequentialInstructions()
{
if (dmg.PoweredOn == false)
{
return;
}
NextInstructions.Clear();
int lookAheadBytes = 0;
for (int i = 0; i < Instruction_Depth; i++)
{
ushort pc = (ushort)(dmg.cpu.PC + lookAheadBytes);
byte opCode = dmg.memory.ReadByte(pc);
lookAheadBytes++;
var newInstruction = StoredInstruction.DeepCopy(dmg.cpu.GetInstruction(opCode));
NextInstructions.Add(newInstruction);
ushort operandValue = 0;
if (newInstruction.OperandLength == 1)
{
operandValue = dmg.memory.ReadByte((ushort)(dmg.cpu.PC + lookAheadBytes));
lookAheadBytes++;
}
else if (newInstruction.OperandLength == 2)
{
operandValue = dmg.memory.ReadShort((ushort)(dmg.cpu.PC + lookAheadBytes));
lookAheadBytes += 2;
}
newInstruction.Operand = operandValue;
newInstruction.PC = pc;
if (opCode == 0xCB && dmg.cpu.GetExtendedInstruction((byte)operandValue) != null)
{
newInstruction.extendedInstruction = dmg.cpu.GetExtendedInstruction((byte)operandValue).DeepCopy();
}
}
}