public void AddInstruction(Instruction instruction)
{
instructions.Add(instruction);
}
private Instruction GetZeroPageAlternative(Instruction instruction)
{
Instruction zeroPageAlternative = null;
if ((operandValue & 0xFF00) == 0)
{
switch (instruction.OperandKind)
{
case OperandKind.Absolute:
Instruction.TryFind(instruction.Mnemonic, OperandKind.ZeroPage, out zeroPageAlternative);
break;
case OperandKind.AbsoluteX:
Instruction.TryFind(instruction.Mnemonic, OperandKind.ZeroPageX, out zeroPageAlternative);
break;
case OperandKind.AbsoluteY:
Instruction.TryFind(instruction.Mnemonic, OperandKind.ZeroPageY, out zeroPageAlternative);
break;
}
}
return zeroPageAlternative;
}
public static bool TryFind(string mnemonic, OperandKind operandKind, out Instruction instruction)
{
return SupportedInstructions.TryGetValue(GetKey(mnemonic, operandKind), out instruction);
}
private void OnInstructionResolved(Instruction instruction)
{
instruction = GetZeroPageAlternative(instruction) ?? instruction;
var operandLo = (byte) (operandValue & 0xFF);
var operandHi = (byte) ((operandValue & 0xFF00) >> 8);
AddOpCode(instruction.OpCode);
switch (instruction.Length)
{
case 1:
break;
case 2:
AddOpCode(operandLo);
break;
case 3:
AddOpCode(operandLo);
AddOpCode(operandHi);
break;
}
}
private static void AddInstruction(Instruction instruction)
{
SupportedInstructions.Add(GetKey(instruction.Mnemonic, instruction.OperandKind), instruction);
}