HP 41 private programm


I have an old (navigation)programm (cards) for my HP-41CX which I want to modify, but it says "private" in the moment I want to edit it. How to overcome this problem?



have a look here. For sure, the answer is there.



Thank you very much Luiz!


This shorter procedure worked for me just fine:

1. Load the program from the card (to be the last program in memory).

2. GTO ..

3. PRGM CAT 1 R/S (immediately after CAT 1)

4. SST (until you see .END. REG xxx)

5. DEL 001 (at .END. REG xxx)

6. <- (back arrow)




I tried this sequence (or somethink close to it) some times, and it worked only with one of the 41's I tested. it seems to me (I think I read it somewhere) a slight change in the 41's OS did not allow it to work; I'm not sure, it must be checked.

It makes me remember the way the first enthusiasts got into Synth Prgm: by removing memory modules in the 41C. The kbd-only procedures were needed with the advent of the 41CV: no way to change mem modules.

How I miss this kind of brainy activity... not in my brain (going fine so far), just in the neighborhood. And I miss the release of this sort of teasing little boxes, too.



If it worked on one of your HP41 this should be enough to de-private the program. ;-)

If you have a ZEN-ROM at hand, you may use RAMED to change the END of your PROGRAM. Or take your program to an emulator of the HP41 (there are some useful arround) and manipulate it there.


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 5,698 12-05-2013, 02:40 AM
Last Post: Hans Brueggemann
  Removing the private status of a file (HP-71b) Klaus 4 1,472 08-28-2009, 03:38 AM
Last Post: Marcus von Cube, Germany
  HP41 Private Function Winfried 0 705 04-07-2008, 05:19 AM
Last Post: Winfried
  A word of precaution on private bidding Han 12 2,785 11-14-2006, 10:58 AM
Last Post: David Smith
  Copying Private HP41 programs Bill Lafferty 8 2,017 06-12-2006, 03:29 AM
Last Post: Vassilis Prevelakis
  Anyone want hp 41 to 41 infra-red data transfer? don wallace 38 8,591 09-21-2005, 04:17 PM
Last Post: don wallace
  Private ROM on HP-41, some observations (long) Miki Mihajlovic 5 1,522 11-12-2004, 01:54 PM
Last Post: Mike (Stgt)
  Breaking Private on HP71 Forrest 10 2,450 11-09-2004, 06:23 AM
Last Post: Veli-Pekka Nousiainen
  Private end code for 41 CX Paul 8 2,001 10-14-2002, 10:50 AM
Last Post: paul
  Private End Code - Bumped Paul 1 754 10-14-2002, 08:06 AM
Last Post: Mike (Stgt)

Forum Jump: