Message #1 Posted by Kostas Kritsilas on 25 July 2007, 11:20 a.m.
I own two HP-97 calculators, and one HP-67. They all currently have the "gummy wheel" problem, which will be fixed shortly. My question concerns the magnetic strips/cards used in the various HP calulators, specifically, the HP-65, the HP-67/97, and the card reader on the HP 41 C/CV/CX.
1. Are the raw cards themselves the same? i.e. can the same card type be written and read on all the calculators, and by this I mean is there a difference in the heads/magnetic surface that the card readers in each of the calculators are designed for, or is there only one card type that is usable for all 3 machines/card readers?
2. I have read that the HP-67/97 cards can be read by the HP-41 card reader, and the HP-67/97 programs are translated in the card reader to allow them to be executed by the HP-41. Is this correct? Can the HP41 write onto the magnetic cards/strips that are readable or executable on the HP-67/97 (I am suspecting no, but would like confirmation)?
3. Can the HP-67/97 read or execute HP-65 programs? The recording density of the HP 67 is much greater, so I am assuming that the HP-65 cannot read the HP-67/97s cards.