Search found 118 matches

by Nigel (UK)
Thu Mar 21, 2024 12:13 pm
Forum: C47/C43, WP43, WP34S
Topic: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm
Replies: 27
Views: 1152

Re: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm

I'm glad you're going to build the code yourself; I hope you can find ways to improve it. Just for the benefit of other readers: you don't have to install the buildchain to try out the program as the .pgm file is already there in the build/ folder. If you're going to look at the code, here are some ...
by Nigel (UK)
Wed Mar 20, 2024 4:28 pm
Forum: C47/C43, WP43, WP34S
Topic: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm
Replies: 27
Views: 1152

Re: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm

Maybe I wasn't clear. zzswap displays all files in the qspi/ folder that have the extension ".bin". I think you are correct that for the calculator to recognise a file as a QSPI file it has to have "_qspi" in its name, but that wasn't what I was taking about. The file selection s...
by Nigel (UK)
Wed Mar 20, 2024 3:07 pm
Forum: C47/C43, WP43, WP34S
Topic: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm
Replies: 27
Views: 1152

Re: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm

Glad you like it! It's up there now, "there" being this Gitlab repository . Look at the README.md file for instructions; it's displayed by default below the files section. There is help in the program itself, but it's limited. Please try it, and report any problems. And pleeeeeeeease back ...
by Nigel (UK)
Wed Mar 20, 2024 12:21 am
Forum: C47/C43, WP43, WP34S
Topic: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm
Replies: 27
Views: 1152

Re: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm

I’ve now written the program (it’s called zzswap) so it didn’t take too long. It appears to work as I intended but I’d like to check it further before uploading it. It’s late now so it should appear sometime tomorrow.

Nigel (UK)
by Nigel (UK)
Mon Mar 18, 2024 11:48 pm
Forum: C47/C43, WP43, WP34S
Topic: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm
Replies: 27
Views: 1152

Re: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm

How about doing this using a separate program on the calculator? Call it zzswitch.pgm to make it easy to find on screen. The procedure to follow would be something like this: Exit from the calculator you are using and get to the DMCP menu, saving your state as you go if your program doesn't do it au...
by Nigel (UK)
Mon Mar 18, 2024 1:57 pm
Forum: C47/C43, WP43, WP34S
Topic: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm
Replies: 27
Views: 1152

Re: A Method To Quickly Change Between DM42 pgm And Any Alternative pgm

A couple of comments: The QSPI files have to be copied, as they get deleted when used. However the .pgm files could live permanently in the top-level directory. This isn't quite so tidy, but disk space is rather limited! How much of this could be done on the calculator itself? DMCP has disk-handling...
by Nigel (UK)
Sat Mar 16, 2024 1:06 pm
Forum: Third Party DM42 firmware builds
Topic: Serious damage possible by installing 3rd party products?
Replies: 13
Views: 533

Re: Serious damage possible by installing 3rd party products?

I imagine that the code for the DMCP menu lives in flash memory, so it's permanent until it is overwritten. DMCP is the operating system for the SwissMicros DM42 platform. Programs such as C47 etc. interact with the screen, keyboard, disk, etc. through calls to functions provided by the DMCP softwar...
by Nigel (UK)
Fri Mar 15, 2024 7:01 pm
Forum: Third Party DM42 firmware builds
Topic: Serious damage possible by installing 3rd party products?
Replies: 13
Views: 533

Re: Serious damage possible by installing 3rd party products?

So, as a summary we could state: a usable recipe to crash the calculator is using a worn out battery and then writing a nice state file. But it would only succeed on software which has no built-in safety guards for this case. ...and even then no lasting damage is done. You may lose the disk content...
by Nigel (UK)
Fri Mar 15, 2024 6:59 pm
Forum: Third Party DM42 firmware builds
Topic: Serious damage possible by installing 3rd party products?
Replies: 13
Views: 533

Re: Serious damage possible by installing 3rd party products?

[...] Of course, some of the builds that I've loaded crash the system, but I have always been able to recover either by pressing the Reset button - or (in bad cases) holding down "-" while pressing Reset. [...] Thank you for the concise report! You said holding down "-" while pr...
by Nigel (UK)
Fri Mar 15, 2024 1:52 pm
Forum: Third Party DM42 firmware builds
Topic: Serious damage possible by installing 3rd party products?
Replies: 13
Views: 533

Re: Serious damage possible by installing 3rd party products?

I would be interested in other people's answers to this as well. My own experience comes mostly from developing the WP34S port to the DM42. While doing this I have flashed calculator memory roughly one thousand times (literally) and there seem to be no bad consequences. Of course, some of the builds...