public void PostByteSimpleX_0_15()
        {
            for (var offset = 0; offset < 16; offset++)
            {
                TestContext.WriteLine("postbyte simple X: {0}", offset);

                Init();
                readMemoryAddress = new List <byte>()
                {
                    (byte)offset
                };
                cpu.set("flags", 0);
                cpu.regX  = 0;
                cpu.regPC = 0;
                var result = cpu.PostByte();
                Assert.That(result, Is.EqualTo(offset));
                Assert.That(cpu.flagsToString(), Is.EqualTo("efhinzvc"));
                Assert.That(cpu.regX, Is.EqualTo(0));
                Assert.That(cpu.tickCount, Is.EqualTo(1));
                Assert.That(readMemoryAddressAccess[0], Is.EqualTo(0));
            }
        }