82104A Card Reader (revision 1F) bug?


In the (HP41) 82180A Extended Functions/Memory Module manual addendum there is reference to a "Card Reader (Revision 1F or earlier) bug", where the VERIFY function may conflict with an 82181A X MEMORY module if plugged into Port 2.

Can anyone tell me how to identify a Card Reader as "Revision 1F or earlier"?


Catalog 2 will give you a list of all plug-ins you have in the 41C.


Thank you, I just worked it out - CATALOG 2 returns the name of the card reader. I have two, one says "CARD READER" and the other "CARD RDR 1G". The former has a 1980 serial number, the latter 1984. So I guess the first one is "Revision 1F or earlier". Time to go to bed....


Hi, Brian;

I remember the earlier 82104A had a "CARD READER" identifier, and the later ones had their versions added to it. I own two working readers, and the earliest of them has a strange bug. Its ID is "CARD RDR 1E", os I guess that the F-type versions would indicate it as well. The newer shows "CARD RDR 1G".

Just my 2¢.


Luiz (Brazil)

Possibly Related Threads…
Thread Author Replies Views Last Post
  Reasonable price for a 41C, Quad Mem, Time, Navigation and Card reader module? Eelco Rouw 10 4,766 12-12-2013, 01:52 AM
Last Post: Eelco Rouw
  hp-67 card reader problem. Marcel Samek 5 3,233 12-09-2013, 09:09 PM
Last Post: Paul Berger (Canada)
  HP Prime - Revision Suggestion - Setting the Clock Bill Triplett 5 2,161 11-15-2013, 12:36 AM
Last Post: Joe Horn
  HP-97 card reader pinch roller axle davorin 2 1,628 09-15-2013, 08:47 AM
Last Post: aj04062
  HP-97 Card Reader davorin 3 1,910 09-13-2013, 04:21 PM
Last Post: Stephan Matthys
  HP-67 Card Reader Repair Question aj04062 1 1,517 08-08-2013, 11:15 AM
Last Post: Randy
  New revision of the PowerCL & Manual Ángel Martin 2 2,305 06-11-2013, 01:43 AM
Last Post: Ángel Martin
  Hp-67 card reader: tantalum capacitor identification Ignacio Sánchez 8 3,269 06-02-2013, 07:26 PM
Last Post: aj04062
  HEPAX Revisited: Revision 1E available Ángel Martin 4 1,613 05-03-2013, 01:57 PM
Last Post: Diego Diaz
  Testing card reader motor for 65 Michae Altmann 2 1,639 03-17-2013, 09:24 PM
Last Post: Randy

Forum Jump: