Someone (Randall Neff) from the Computer History Museum has scanned a lot of the documents from Knuth's personal collection; search for "Dijkstra" on this page:

Someone (Randall Neff) from the Computer History Museum has scanned a lot of the documents from Knuth's personal collection; search for "Dijkstra" on this page: https://archive.computerhistory.org/resources/text/Knuth_Don_X4100/PDF_index/KnuthDigitalArchive-Index.html https://archive.computerhistory.org/resources/text/Knuth_Don... The following document is labelled as the source code (the OS was called "THE"; see https://en.wikipedia.org/w/index.php?title=THE_multiprogramming_system&oldid=979514733 https://en.wikipedia.org/w/index.php?title=THE_multiprogramm...): https://archive.computerhistory.org/resources/text/Knuth_Don_X4100/PDF_index/k-1-pdf/k-1-C1063.6-source-THE-os.pdf https://archive.computerhistory.org/resources/text/Knuth_Don... (254 pages of assembly code), but there are also other related documents listed on the page.