Fully testing HP 41



I love old hp calculators since i'm young, but too expensive for me at that time ;-)

Now, I could purchase several ones (67, 41c, 41cv, 41cx), not to store them in a shelf but to have the pleasure of using them daily :-)

For 67, it exist a program that fully test it, but I've none for 41...
So my question is: is it possible to find on the market the Service Roms used to deeply test them ? Is there an alternative to this ?

Thanks a lot for your help and experience.


In the case of the 41C, 41CV and 41CX there are specific ROM modules that were used to test the functions.

There is no "blanket program" akin to the 67/97 or 65 families, or self tests such as the voyager and later families.

If you have a CLONIX and PIC programmer you can configure the clonix to be a TEST ROM.

Not to helpful, I know, so test the old fashioned way. try out functions and compare the answers to a known source.

Cheers, Geoff



I know I saw somewhere that if you have the 67 test (on magnetic card) you can modify the test to run on the HP41.

I remember starting to try that once but didn't get back to it...


The card reader for the 41 has a routine built in to convert programs from a 67/97 to run on the 41.


The problem with the 67 diagnostic is that it doesn't test all the extras that the 41C has:

nested executes
time functions
x memory
x functions
rom module connections

It does test the 67 extensiviley. Also, the error codes that arise will be on the most part meaningless as they are specific to the 67.

Cheers, Geoff


Thanks a lot for your answers.

I'll try to find one of those old test rom.



I have two HP-41 test modules. I remember one labled "PCP ET 11966". I don't remember what it does. You can borrow them for testing and copying if you want to.




See this article . Some details about the HP 41c/v/x service Modules.

Possibly Related Threads…
Thread Author Replies Views Last Post
  HP-41(CL): The easiest way to transfer FOCAL programs from a Linux PC to the HP-41 Geir Isene 13 5,663 12-05-2013, 02:40 AM
Last Post: Hans Brueggemann
  Testing card reader motor for 65 Michae Altmann 2 1,629 03-17-2013, 09:24 PM
Last Post: Randy
  [WP 34S] New GCC - Testing required Marcus von Cube, Germany 3 1,545 01-07-2013, 01:59 PM
Last Post: Marcus von Cube, Germany
  Testing the water Ken McPherson 0 855 08-07-2012, 09:18 PM
Last Post: Ken McPherson
  HP48SX seems fully functional won't run SELF TESTS? Bruce Larrabee 5 1,988 07-16-2012, 11:04 PM
Last Post: Luiz C. Vieira (Brazil)
  NCEES and Computer Based Testing Richard Garner 2 1,247 04-10-2012, 07:14 PM
Last Post: Steve Fennell
  WP 34S: Memory Allocation - New Document / Testing Marcus von Cube, Germany 0 794 11-09-2011, 11:48 AM
Last Post: Marcus von Cube, Germany
  WP 34S: Some testing required Marcus von Cube, Germany 27 7,563 10-15-2011, 11:15 AM
Last Post: Marcus von Cube, Germany
  OT: Help with Testing Random Number Generators Namir 5 1,829 08-01-2011, 11:20 PM
Last Post: Paul Dale
  Testing functionality of older HP calculators Pat Slattery 2 1,100 05-25-2011, 09:18 PM
Last Post: Pat Slattery

Forum Jump: