Thank you this really helps.

One last question do the individual files. There seems to be 3 distinct file groups:

0b.txt - 8t.txt

l0.txt - l3.txt

r0.txt-r3.txt

Do each of these represent different ROMs or different logical parts of the two ROMs? Or am I reading too much into the naming convention?

By the way - brilliant work. This is really a fascinating read.