public void Signed_16bit()
{
TestContext.WriteLine("signed 16bit");
var val0 = (short)cpu.signed16(0);
var val7fff = (short)cpu.signed16(0x7FFF);
var val8000 = (short)cpu.signed16(0x8000);
var valffff = (short)cpu.signed16(0xFFFF);
//ushort valUndef = cpu.signed16();
Assert.That(val0, Is.EqualTo(0));
Assert.That(val7fff, Is.EqualTo(32767));
Assert.That(val8000, Is.EqualTo(-32768));
Assert.That(valffff, Is.EqualTo(-1));
//Assert.That(valUndef, Is.EqualTo(undefined));
}