I am trying to determine the revision date codes of three HP 2100/21MX diagnostic binary paper tapes in my possession. If anyone has the "Diagnostic Configurator Reference Manual" (HP number 02100-90157) with a print date later than August 1976 and earlier than January 1978, please check Table A-1 in Appendix A for the revision codes for the following diagnostic serial numbers: DSN 111202 -- 7900/01 CARTRIDGE DISC -- 12960-16001 DSN 111303 -- 7905 CARTRIDGE DISC -- 12962-16001 DSN 146100 -- PAPER TAPE READER-PUNCH -- 12597-16001 It's also possible that the revision codes are listed in the corresponding diagnostic operating manuals from that time period; these are the part numbers: 12960-90003 12962-90001 12597-90031 (I have the Configurator manuals before and after the above dates, and the DSNs bracket the ones I'm trying to identify.) -- Dave