Search found 192 matches

by EM41
Tue Oct 17, 2023 11:34 pm
Forum: Discuss!
Topic: Internal FAT Lifetime
Replies: 11
Views: 4686

Re: Internal FAT Lifetime

The flash memory is a macronix MX 25R6435F with a read write lifetime of 100.000 cycles. Source, my own DM41 (its IC 1) and https://www.macronix.com/Lists/Datasheet/Attachments/8868/MX25R6435F,%20Wide%20Range,%2064Mb,%20v1.6.pdf If you flash the memory 10 times a day the memory will in theory last m...
by EM41
Tue Oct 03, 2023 11:12 pm
Forum: Hardware issues
Topic: DM41X Memory Lost on Startup
Replies: 10
Views: 3174

Re: DM41X Memory Lost on Startup

I had exactly the same with my beta DM41, there was something with the PCB, I received a new and the keyboard was DM42. Unzip attached file and copy to the root of the calc. And your problem sounds like a battery problem, just get a set from another store, could be a bad batch, DM's are very battery...
by EM41
Tue Aug 22, 2023 7:02 pm
Forum: DM41X
Topic: HP-97
Replies: 3
Views: 44512

Re: HP-97

Didier extracted the cardreader rom and modified it in such a way that it runs on the DM41. It contains the HP-97 conversion functions so you can basically run almost all HP-97 programs on the DM-41. If you just want to run your old stuff I would give it a try. Have a look here https://forum.swissmi...
by EM41
Fri Aug 11, 2023 2:35 am
Forum: Hardware issues
Topic: Upgraded keypad
Replies: 168
Views: 51224

Re: Upgraded keypad

Just installed the new foil on my DM41 beta that had some problems with missing keystrokes. Problems are gone and the keyboard overall is much better now. Its worth changing if you have the beta.
by EM41
Mon Sep 19, 2022 10:53 am
Forum: Hardware issues
Topic: Upgraded keypad
Replies: 168
Views: 51224

Re: Upgraded keypad

redglyph wrote:
Mon Sep 19, 2022 9:37 am
In conclusion, I'll be more patient next time and wait until everything had time to be ironed out. :)
Whats the fun of that, I had the best time of my life betatesting the DM41 with bugs, errors, keys leaving paint etc :D
by EM41
Thu Sep 08, 2022 1:39 pm
Forum: Hardware issues
Topic: Upgraded keypad
Replies: 168
Views: 51224

Re: Upgraded keypad

For those in the Netherlands that need isopropyl alcohol https://www.deoplosmiddelspecialist.nl/ ... alcohol-1l
by EM41
Thu Sep 08, 2022 1:35 pm
Forum: Hardware issues
Topic: Upgraded keypad
Replies: 168
Views: 51224

Re: Upgraded keypad

Here is the video explaining how to replace the foil: https://www.youtube.com/watch?v=31nGiNef2KY We should get them in a few weeks. :) As far as I understand this is only for non registering keys and not for obtaining the new clicky keyboard feel. Isn't that the same? Older keys were not registeri...
by EM41
Wed Aug 31, 2022 9:50 am
Forum: Hardware issues
Topic: Upgraded keypad
Replies: 168
Views: 51224

Re: Upgraded keypad

As far as I understand this is only for non registering keys and not for obtaining the new clicky keyboard feel.
by EM41
Sat Nov 20, 2021 1:51 pm
Forum: Discuss!
Topic: Inspiring the next generation of RPN users
Replies: 96
Views: 27690

Re: Inspiring the next generation of RPN users

Oh dear, you have also to include the 68 % flag for 1 sigma confidence, used in social and other fake sciences. But in engineering you usually use 2 sigma (95 %) and in critical applications such as medical and aeronautical applications 3 sigma (99,7 %). Depends what profession you are coming from, ...
by EM41
Tue Nov 16, 2021 9:41 pm
Forum: User Software Contributions
Topic: QRBD a simple contest calculator
Replies: 0
Views: 3829

QRBD a simple contest calculator

I couldn't upload the program and documentation here because the manual violates the maximum file size.
It can be downloaded here: https://www.hpmuseum.org/forum/thread-17714.html