A dumb question ?

Discussion around the Swiss Micros DM42 calculator.
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HPMike
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A dumb question ?

Post by HPMike » Fri Dec 29, 2017 7:33 pm

Please forgive my ignorance, but I want to know if programs and data that I have saved using SETUP File Save Program and SETUP Calc.State Save State are preserved not only after a RESET, but also from battery removal/discharge. Is there anything that is not saved by these procedures ? TIA HPMike.
DM15L, S/N 00548. DM42, SN: 00159.

Geoff Quickfall
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Re: A dumb question ?

Post by Geoff Quickfall » Fri Dec 29, 2017 7:57 pm

Boy is that a stupid,... wait a second, good question!

I use USB and save the entire fat to a backup folder on my laptop as well as save state and save file. What else Is saved in save state???

Geoff
Last edited by Geoff Quickfall on Sat Dec 30, 2017 12:53 am, edited 1 time in total.

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Walter
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Re: A dumb question ?

Post by Walter » Fri Dec 29, 2017 10:36 pm

AFAIK the entire user RAM is saved in flash memory so it will survive a battery loss as well.
DM42 SN: 00041 --- Follower of Platon.

HP-35, HP-45, ..., HP-50, WP 34S, WP 31S, DM16L

Thomas Okken
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Re: A dumb question ?

Post by Thomas Okken » Fri Dec 29, 2017 11:17 pm

The Free42 state includes everything the real calculator remembers: programs, variables, registers, flags, the command line, etc. -- but also additional state like the position of the app window on the desktop, the names of the files used to capture printer output, auto-repeat mode...

Only David or Michael can answer definitively what, exactly, DM42 stores in its saved state.

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Guenter
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Re: A dumb question ?

Post by Guenter » Fri Dec 29, 2017 11:24 pm

HPMike wrote:
Fri Dec 29, 2017 7:33 pm
Please forgive my ignorance, but I want to know if programs and data that I have saved using SETUP File Save Program and SETUP Calc.State Save State are preserved not only after a RESET, but also from battery removal/discharge. Is there anything that is not saved by these procedures ? TIA HPMike.
Files and States are saved to the flash memory by saving them using the saving options from the SETUP :-)
Flash memory doesn't need any power to retain what's saved there. Thus changing the battery doesn't affect the flash memory.

But it always may occur that some strange forces find their way into your precious device, having some negative effect. Or you inadvertently invoke a check of the disk or do some kind of formatting or what else an adventurous user may try to test what treatment the DM42 can survive.

HTH, Günter
DM42 SN:00004 and SN:00184

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