magnetic cards and different card readers



#6

Can magnetic cards written by a card reader be read by a different card reader?

I'm assuming same kind of calculator (say 2 HP 67s or 2 HP-41s).

I know that in principle it should work, but I was wondering how *well* it works in practice.

Thanks!

Alex Binca


#7

It sure is suppose to work! In fact, that's the best way to test out repaired card readers. I first make sure that the reader can read its own writing (so to speak), then make sure that it can read the Standard Pac cards finally I make sure that it can read cards written by at least one other 67/97 (or 65 or 41) and can write cards that the other calcualtor can read. I do all these tests repeatedly and only accept a repair if there are no errors. (This means that I have to re-do a repair about 1 out of 3 times.)


#8

The magnetic cards have separate and parallel data and clock tracks, so there is enoug information on the card to allow for synchronizing, even with mechanical variations and tolerances.

In fact, the same principle is used in the hand-pulled (!) card reader/writer of the HP75; so it accomodates differences between the pulling power of differen people (or the same person over time)

#9

Also, the HP41 reader can read, translate, and execute almost all HP67/HP97 programs automatically.


#10

Also, the TI-59 had a module ("RPN simulator") that would translate/interpret (most?) programs originally written for the HP-97.

I got such a module a while ago, but I haven't tried it yet. I believe that it is not really practical, but I always found the idea kind of whimsical,

-- Paul Novaes


Possibly Related Threads...
Thread Author Replies Views Last Post
  hp-41 Cards Marcel Samek 8 1,305 11-07-2013, 11:13 PM
Last Post: Garth Wilson
  re-recording original cards aj04062 2 676 09-15-2013, 10:32 AM
Last Post: Dieter
  magnetic strip malfunction aurelio 7 1,086 01-14-2013, 12:25 AM
Last Post: aurelio
  Series 80 EPROM cards Paul Berger (Canada) 0 619 12-08-2012, 07:50 PM
Last Post: Paul Berger (Canada)
  Anyone willing to read some HP41 cards? LarryLion 10 1,335 09-05-2012, 01:48 AM
Last Post: Juergen Keller
  HP 48SX Solve Equation Library Cards Mike Hein 3 773 08-22-2012, 01:07 PM
Last Post: Chris Dreher
  Question about magnetic cards for the HP-41C Card Reader Namir 2 627 08-15-2012, 12:15 PM
Last Post: Namir
  HP41 Card Reader not Pulling Card Colin Verrilli 14 1,675 07-29-2012, 05:53 PM
Last Post: Randy
  HP-67/97 Mag Cards...Can they be marketed again? Matt Agajanian 11 1,471 05-14-2012, 10:22 PM
Last Post: Dale Reed
  HP65 program cards compatibility aurelio 2 643 05-04-2012, 04:43 AM
Last Post: aurelio

Forum Jump: