Hi, we're still trying to get our hp 9815a and 9815s going. The "s" is intermittent now. Sometimes the memory is 904 steps; other times it is the full 3720. But now we are wondering if the old program cassette tapes are still working.
Does anyone have a 100% known-to-be-working hp 9815a or 9815s? If so, would you be willing to run our DC 100 cassette tapes on your calculator? We need to learn whether anything is on these tapes. If there are still programs on the tapes, we would like to list the programs in hard copy via the printer, and we also want to make backup tapes. We have a roll of themal paper, and some new DC 100 tapes.
Thank you. Frank