I am looking for information on old microprocessors. Specifically, does anyone know where I can get a copy (preferably a PDF) of old application notes, user manuals, and datasheets for the Signetics 2650 microprocessor that was heavily marketed in the 1970s? Signetics was aqcuired by Philips in 1975 and subsequently the signetics 2650 became the SC26 series of Philips.

Thanks!