* isatables CSV files are from Microwatt decode1.vhdl which is
CC 4.0 Copyrighted
+ https://github.com/antonblanchard/microwatt/blob/master/decode1.vhdl
* isatables fields.txt is from the OpenPOWER v3.0B specification which
is managed by the OpenPOWER Foundation
* isa markdown files are extracted from the OpenPOWER v3.0B specification which