public int Shift(int tms, int tdi)
{
if (tms != 0)
{
tms = 1;
}
if (tdi != 0)
{
tdi = 1;
}
_sp.Write((byte)(0x80 | (tms << 1) | tdi));
byte ret = _sp.Read();
if (_verbose)
{
Console.WriteLine("tms = {0}, tdi = {1}, tdo = {2}", tms, tdi, ret);
}
return(ret);
}