Updated with a Hex mode demo video:

Finally got a new mode working, thanks to the suggestion of Morgan. This mode displays the HEX values of the 64 bits, aka 16 nibbles or characters. The upper left nibble on the LED array is the first HEX character, and the lower right nibble on the LED array is the last HEX character. Stated another way, when the LED/CORE array is used as a 64-bit value, MSb is upper left, LSb is lower right.

I split the nibbles into two rows of eight for the OLED display in order to clearly display some "English" hex words. Yes, it is interactive too! I'll share a video when the OLED stability issue is resolved. The text keeps drifting across the screen, and it's very annoying. I need to figure out if this is an electronic or firmware logic or library problem.