Hi, I'm working on the same thing now and I have to admit your story thoroughly confuses me.
16 bytes times 2 makes 32 bits, but 8 by 8 bits make 64, so I'm guessing now a tile is 4 bits deep by 8 bits long, since there are rows of 4 tiles, thus 32 bits, making a total depth of 8 tiles?
I'm...