> 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 > > https://drive.google.com/open?id=0B2v4WRwISEQRWWFFdVpCZWFTZEU > > In subfolder pdf/dec/pdp11/1145
Thanks, Jay! 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... :-) --FritzM.