a2gs_xortest
2022-09-29 John Tsiombikasfoo master
2022-09-15 John Tsiombikasfixed off-by one on palette setup
2022-09-15 John Tsiombikasfixed pixel order, added LARGE option
2022-09-14 John Tsiombikasxor not right
2022-09-14 John Tsiombikaspalette test