How will you modify a giant lookup table where the values are fixed in hardware? It's read-only. So what? The Heartbleed attack didn't modify OpenSSL at all

How will you modify a giant lookup table where the values are fixed in hardware? It's read-only. So what? The Heartbleed attack didn't modify OpenSSL at all, yet it was a colossally awful vulnerability. "The running process cannot be modified" does not mean it is "unhackable". A static lookup table could still enable all sorts of awful bugs. How do you guarantee all the entries are good, and don't have any unfortunate side-effects? I asked for a link so I could evaluate the actual system, rather than debate its theoretical merits.