The first batch of scanning is done... 600dpi, CCITT
Group 4 except for
the cover pages which are LZW.
You will find them in my Google Drive at
In subfolder pdf/dec/pdp11/1145
I note with some amusement pencil annotations on various pages, relating to the very same
bits of parity circuitry that I am investigating! It looks like somebody else might have
been having a go down the same path... :-)