You had previously posted on this question I had once before.
And you had posted an example.
I finally took the time to try and pick it apart and finally understood how it was doing it.

We can really only do things with 1 byte and I saw that you were getting the high byte in the first lookup table and then just adding 1 to dptr or acc either way to get the low byte.

And then storing those to be placed in DPTR later for then next lookup table.

very nice routines

Thank you.