DM42 hung, had to reset

If you're having problems with the hardware of a DM41X or DM42, post about them here.
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rudi
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Re: DM42 hung, had to reset

Post by rudi »

He he Massimo - I also think it sounds a bit drastic.
I had a look here: https://technical.swissmicros.com/dm42/ ... t_fat_disk
But I'm not 100% comfortable with how to perform the operation. I'll remain in orbit and consider nuking it a bit longer ;-)
/Rudi

DM-42 (s/n 06999), HP-42S, HP-35s, HP-11c, HP-32SII (ex HP-41CV, ex HP-75C, ex HP-48G + a lot, really lot of a accessories)
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rprosperi
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Re: DM42 hung, had to reset

Post by rprosperi »

rudi wrote:
Thu May 12, 2022 5:19 pm
He he Massimo - I also think it sounds a bit drastic.
I had a look here: https://technical.swissmicros.com/dm42/ ... t_fat_disk
But I'm not 100% comfortable with how to perform the operation. I'll remain in orbit and consider nuking it a bit longer ;-)
LOL, what Massimo posted is funny and ironic; it's exactly what I was going to end my post above with, but wasn't sure the reference would be picked up. Shoulda known.... :)

The flashing procedure is as absolutely simple as it looks, and it does not damage the flash.

The whole procedure looks like this:

A. Connect to PC via USB mode
B. Copy the entire FAT contents to a folder on the PC, somewhere, as a reference
C. Disconnect DM42 from PC (after telling PC to disconnect drive of course...)
D. Go into the DMCP menu and nuke it! (er... format the FAT)
E. Connect to PC again
F. Rebuild all the Folders using File Explorer or Finder, with exact same names
G. Move NEW copies of files into all the folders, using your copy from B. as a reference only for which files you need
DO NOT COPY THE FILES YOU SAVED, they may be corrupt
H. Copies of files for a 'standard', new DM42 are available here: https://technical.swissmicros.com/dm42/fat/
I. Disconnect from PC (after telling PC to disconnect drive of course...)
J. Enjoy your DM42!
--bob p

DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
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rudi
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Re: DM42 hung, had to reset

Post by rudi »

Thanks for the detailed instructions. I’ll give it a go and report back.
/Rudi

DM-42 (s/n 06999), HP-42S, HP-35s, HP-11c, HP-32SII (ex HP-41CV, ex HP-75C, ex HP-48G + a lot, really lot of a accessories)
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rudi
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Re: DM42 hung, had to reset

Post by rudi »

Done, FAT reformatted.
I'll keep an eye on the calculator and report back, if it starts behaving strange again.

One strange thing I noticed just before, the HELP folder on the DM42 was empty?
/Rudi

DM-42 (s/n 06999), HP-42S, HP-35s, HP-11c, HP-32SII (ex HP-41CV, ex HP-75C, ex HP-48G + a lot, really lot of a accessories)
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rprosperi
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Re: DM42 hung, had to reset

Post by rprosperi »

rudi wrote:
Thu May 12, 2022 9:46 pm
Done, FAT reformatted.
I'll keep an eye on the calculator and report back, if it starts behaving strange again.

One strange thing I noticed just before, the HELP folder on the DM42 was empty?
Great, glad it was easy to follow.

I'd guess that the help file got clobbered when the FAT was damaged; there's no way to ever know for sure, but as it's all back now, suppose it doesn't matter.

Good luck and thanks for leaving the feedback that it was easy to do, it will encourage the next person that needs help and reads this.
--bob p

DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
newbrain
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Re: DM42 hung, had to reset

Post by newbrain »

rprosperi, edited by newbrain wrote:
Thu May 12, 2022 6:02 pm
...(after telling PC to disconnect drive of course...)...
...(after telling PC to disconnect drive of course...)...
Unless one has an oldish version of Windows 10, this has not been needed for more than 3 years (unless one fiddles with default policies), one less thing to think of while troubleshooting.

It does not hurt, though (and of course yanking a drive in the middle of writing is not good).
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rudi
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Re: DM42 hung, had to reset

Post by rudi »

Yes - on my Windows 11, Windows File Explorer closes automatically, when USB Disk mode is exited on hte DM42
/Rudi

DM-42 (s/n 06999), HP-42S, HP-35s, HP-11c, HP-32SII (ex HP-41CV, ex HP-75C, ex HP-48G + a lot, really lot of a accessories)
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DA74254
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Re: DM42 hung, had to reset

Post by DA74254 »

newbrain wrote:
Fri May 13, 2022 10:26 am
rprosperi, edited by newbrain wrote:
Thu May 12, 2022 6:02 pm
...(after telling PC to disconnect drive of course...)...
...(after telling PC to disconnect drive of course...)...
Unless one has an oldish version of Windows 10, this has not been needed for more than 3 years (unless one fiddles with default policies), one less thing to think of while troubleshooting.

It does not hurt, though (and of course yanking a drive in the middle of writing is not good).
That's not entirely correct. I'm running Win11 and yanking out a CFExpress card (which basically mounts as an SSD) will shut down your PC imediately. As in equivalent to yanking out the power plug.
Esben
DM42 SN: 00245, WP43 Pilot SN:00002, DM32 SN: 00045 (Listed in obtained order).
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