I see that you used Cowgod's Chip8 reference. That document gets a number of details subtly wrong. In particular, shift and load/store instructions. I strongly

I see that you used Cowgod's Chip8 reference. That document gets a number of details subtly wrong. In particular, shift and load/store instructions. I strongly encourage referring to the more accurate "Mastering Chip8": http://mattmik.com/files/chip8/mastering/chip8.html http://mattmik.com/files/chip8/mastering/chip8.html