Thank you for this, this is a wonderful resource!
I found the link to download an ASCII version of 1984 by reading the readme.txt file, the anchor link seemed broken.
Hope this helps another seeker:
https://orwell.ru/Download/1984/e84_asc.zip
One of the cool things I think about 1984 that occurred to me while re-reading the appendix now as suggested by the article is that in order for Orwell to say something very new about our civilization, or at least to say something old but to many new people, he needed to invent his own language to do it. In a sense there's mirror between what Orwell is doing with his book, in telling our society about itself, and what Ingsoc was doing to Oceania, in limiting thought to goodthink. They both invented a new language in order to relate a new meaning. I like that, and there's something...peculiar about books that invent a lot of new terms. Like LOTR and Harry Potter. There's something "generationally transformative" about such books, maybe. In a sense sci-fi is all-in on this sort of word coining, Matrix, Terminator, Star Trek.
Nineteen Eighty-four is sort of sci-fi. It's set in the future. And then the appendix, is set even further in the future talking in staid and "encycolpaedia"-like tone about the time of the events of the book as if it is in the past. What if Orwell was a time traveler, who wrote 1984 after a visit to a possible future, and was told that by writing this book, that future would not persist. Then on his second trip back to the future he verified he'd changed that timeline by writing his book, and lifted the appendix to 1984 from an encyclopedia on "the rise and fall of English socialism" from the future after the collapse of the political system his book had helped undo. Closed time like curves.