Oh dear the entire https://www.lyonlabs.org site is offline *and* excluded from archive.org.

It's a massive archive of vintage and modern GEOS and C64 material a lot of it seemingly not found elsewhere.

@damieng archive.ph seems to have at least some of it: https://archive.ph/IIOAR

@buherator Yeah found a few pages there plus also this had a bunch of stuff including the pdf I was after https://codeberg.org/Cenbe