These files are useful for testing the C64 82S100-PLA (but also some compatible replacements) with the Xgecu T48/T56/TL866II Plus programmers/testers.
Further information:
http://www.breakintoprogram.co.uk/hardware/fixing-a-poorly-commodore-64-part-3
Thanks so much to The Retro Channel for providing these helpful resources https://www.youtube.com/watch?v=SQ0MVKTrAD4&lc