private Opcode ExecuteDecode(byte singleByteInstruction, byte parameter)
{
_builder.Clear();
_builder.Add(singleByteInstruction);
_builder.Add(parameter);
return(_builder.Opcode);
}
private Opcode ExecuteDecode(byte singleByteInstruction, UInt16 parameter)
{
_builder.Clear();
_builder.Add(singleByteInstruction);
_builder.Add((byte)(parameter & 0xFF));
_builder.Add((byte)(parameter >> 8));
return(_builder.Opcode);
}
public bool AddOpcodeByte(OpcodeByte opcodeByte)
{
var valid = _opcodeBuilder.Add(opcodeByte);
if (valid)
{
_cycles.OpcodeDefinition = _opcodeBuilder.Opcode.Definition;
}
return(valid);
}
public bool AddOpcodeByte(OpcodeByte opcodeByte)
{
if (_opcodeBuilder.IsEmpty)
{
_instructionAddress = (ushort)(Cpu.Registers.PC - 1);
}
var valid = _opcodeBuilder.Add(opcodeByte);
if (valid)
{
_opcodeBuilder.Opcode.Address = _instructionAddress;
_cycles.OpcodeDefinition = _opcodeBuilder.Opcode.Definition;
}
return(valid);
}