public void RETTest()
{
PrivateObject z = new PrivateObject(new Z80(new Memory48K()));
Z80_Accessor target = new Z80_Accessor(z);
target.PC = 0x3535;
target.SP = 0x5000;
target.Memory[0x5000] = 0xb5;
target.Memory[0x5001] = 0x18;
target.RET();
Assert.IsTrue(target.SP == 0x5002 && target.PC == 0x18b5, "Error: RET");
}