Search found 192 matches
- Tue Oct 17, 2023 11:34 pm
- Forum: Discuss!
- Topic: Internal FAT Lifetime
- Replies: 11
- Views: 4834
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...
- Tue Oct 03, 2023 11:12 pm
- Forum: Hardware issues
- Topic: DM41X Memory Lost on Startup
- Replies: 10
- Views: 3273
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...
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...
- Fri Aug 11, 2023 2:35 am
- Forum: Hardware issues
- Topic: Upgraded keypad
- Replies: 168
- Views: 52966
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.
- Mon Sep 19, 2022 10:53 am
- Forum: Hardware issues
- Topic: Upgraded keypad
- Replies: 168
- Views: 52966
- Thu Sep 08, 2022 1:39 pm
- Forum: Hardware issues
- Topic: Upgraded keypad
- Replies: 168
- Views: 52966
Re: Upgraded keypad
For those in the Netherlands that need isopropyl alcohol https://www.deoplosmiddelspecialist.nl/ ... alcohol-1l
- Thu Sep 08, 2022 1:35 pm
- Forum: Hardware issues
- Topic: Upgraded keypad
- Replies: 168
- Views: 52966
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...
- Wed Aug 31, 2022 9:50 am
- Forum: Hardware issues
- Topic: Upgraded keypad
- Replies: 168
- Views: 52966
Re: Upgraded keypad
As far as I understand this is only for non registering keys and not for obtaining the new clicky keyboard feel.
- Sat Nov 20, 2021 1:51 pm
- Forum: Discuss!
- Topic: Inspiring the next generation of RPN users
- Replies: 96
- Views: 28813
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, ...
- Tue Nov 16, 2021 9:41 pm
- Forum: User Software Contributions
- Topic: QRBD a simple contest calculator
- Replies: 0
- Views: 4004
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
It can be downloaded here: https://www.hpmuseum.org/forum/thread-17714.html