There's a 4 page Datasheet for the DM74S571, here:
http://theoddys.com/acorn/Semiconduc...iconductor.pdf
And it doesn't look like it end unexpectedly, although there may be a separate section in the original databooks (probably on various archive / bitsavers etc. websites) on programming their PRON's, from what I recall.
Edit: Attached is an edied version of the NS 1977 Memory databook, that has (1 page) programming procedure for these, and also has the contents index, which appears to show from page numbers order that the 74S571 datasheet had 5 pages in that version.